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(c) Marek Trokenheim

1.b4 e5 2.Bb2 e4
Helsingborg defence

(...)

3.Na3 Bb4 4.Bg7 Ba3 5.c3+/-.

3.Na3 Nf6+= 4.c3 Be7 5.d3 0–0 6.Qc2 d5 7.0–0–0 (7.de4 Ne4 8.f3 Nf6-/+) 7...Bf5 8.h3 a5 9.g4 (9.b5 Bd6-/+) 9...Bg6 (9...ed3 10.ed3 ab4 11.gf5 ba3 12.Ba1–+) 10.Nb1? (better is 10.b5-/+) 10...ab4–+ 11.cb4 Bb4 12.a3 Be7 13.Nc3 (13.Kd2 Nbd7–+) 13...Ba3 14.g5 (14.Ba3 Ra3 15.Kd2 Qd6–+) 14...Nfd7 15.de4 Qg5 16.e3 de4 17.Ne4 (17.Kd2 Bb4–+) 17...Be4 (better is 17...Bb2 18.Kb2 Qe7 19.Qc3 Be4 20.f3–+) 18.Qe4 Qc5 (better is 18...Qf6 19.Ba3 Ra3–+) 19.Kb1 (19.Qc4 Bb2 20.Kb2 Qa3 21.Kc2–+) 19...Bb2 20.Bd3 (20.Qc4 Ra1 21.Kc2 Qf5 22.e4 Qf2 23.Qe2–+) 20...Ra1 21.Kb2 Qa3 22.Kc2 Ra2 0–1. Korisso – Hubert,Raphael (1800), Chateauroux op, 2005.

3.a4 d5 4.e3 Nf6 5.b5 (--> 1.b4 e5 2.Bb2 e4 3.e3 Nf6 4.b5 d5 5.a4).

3.b5 c5 4.c4 d5 5.e3 (5.cd5 Qd5 6.Nc3 Qe6=) 5...d4+= 6.ed4 cd4 7.f3 Qe7 (better is 7...Bf5!?+=) 8.fe4+/– Nf6 9.Bd4 Qe4 10.Qe2 b6?? (10...Nbd7 11.Nf3+/–) 11.Qe4 (better is 11.Bf6 Qe2 12.Be2+–) 11...Ne4 12.Nc3 (12.Be2 Ng5+–) 12...Nc3+/– 13.Bc3 Bb7 14.d4 Bd6 15.a4 0–0 16.a5 Nd7 17.d5 Nc5 18.Nf3 Rfe8 19.Kf2?? (better is 19.Kd1+–) 19...Ne4–+ 20.Ke3 Nc3 21.Kd2 Ne4 (21...Ne4 22.Kc2 Nf2–+) 0–1. Waibel,Ulrich (1830) – Worobjew,Viktor (2010), remoteschach.de, 2005.

3.c4 a5 4.b5 (4.Qc2 A) 4...Bb4?? 5.Bg7 (5.Qe4?! Kf8+=) 5...Nf6 6.Bh8+–; B) 4...Nf6=) 4...b6 (4...Nf6 5.Nc3=) 5.e3 Nf6 6.a3 (6.d3 Bb7=) 6...Bb7 7.Ne2 Bc5 (7...Be7 8.Nf4=) 8.Nf4 d6 (8...Be7 9.Be2=) 9.Be2 (9.d4 ed3 10.Bd3 Nbd7+=) 9...0–0= 10.0–0 Nbd7 11.d4 ed3 12.Nd3 Qe7 (12...Re8 13.Nc5 Nc5 14.Bf3=) 13.Nc3 Rfe8 14.Rc1 Rad8 15.Nf4 Ne5 (15...Rb8 16.Ncd5 Qd8 17.Nd3+=) 16.Ncd5 Nd5 17.cd5 Ng6 (17...Qg5 18.Qc2+=) 18.Nh5 (18.Ng6 fg6 19.Qd3 Bc8+/–) 18...f6 19.Ng3 Qf7 20.e4 Bc8 (20...f5 21.Nf5 (worse is 21.ef5 Ne5=) 21...Re4 22.Ng7 Bd5 23.Nh5+/–) 21.Bh5 Qd7 (21...Re7 22.Bg4+/–) 22.a4 Rf8 (22...Re7 23.Bg6 hg6 24.Bd4+/–) 23.Nf5 (23.Bg6 hg6 24.Qd3 Rde8+/–) 23...Nf4 (23...Ne5 24.Bg4 Ng4 25.Qg4+/–) 24.Bg4 Qe8 25.Rc4 (25.Qf3 Ng6+/–) 25...g6 (25...Ng6 26.Bh5+/–) 26.Nh6 Kg7 27.Qd2 Kh6 28.Qf4 g5 29.Qf3 Bg4 30.Qg4 Qd7 31.Qg3 Kg6 (31...Rde8 32.Re1+/–) 32.Kh1 (32.Bc1 Rde8+/–) 32...f5+/– 33.f4 g4 34.h3 h5 35.Qh4 Qf7 (35...gh3 36.Qg5 Kf7 37.gh3 Rg8 38.Qh5 Kf8+–) 36.hg4 hg4?? (36...fg4 37.f5 Kh6+–) 37.Qg5 Kh7 38.ef5 1–0. Dopper,Johan – Veer,W, corr ICCF tt, 1993.

3.c4 a6 4.Nc3 f5 5.a3 Nc6 6.e3 d6 7.Be2 Nh6 (7...Qg5 8.g3=) 8.d4 ed3 9.Bd3 g6? (better is 9...Be6!?+=) 10.Nd5+/– Ne5 11.f4 Nd3 (better is 11...c6!? 12.fe5 cd5 13.ed6 dc4 14.Bc4 Qh4 15.g3 Qc4 16.Bh8 Qe6+/–) 12.Qd3+– Ng4? (12...Rg8 13.Nf6 Ke7 14.Ng8 Ng8+–) 13.Bh8 (13...c6 14.Nc3+–) 1–0. Wall,Bill – Haden,Glen, internet, 2003.

3.c4 b6 4.a3 Bb7 (4...Nf6 5.d3 Bb7 6.e3=) 5.e3 (5.d3 Nf6=) 5...d6 (5...Nf6 6.d3=) 6.Qg4 (6.d3 Nf6=) 6...Nf6 7.Qh4 (7.Qg3 a6=) 7...Nbd7 8.f4 (8.Be2 Be7=) 8...ef3 (8...d5 9.cd5 Nd5 10.Qd8 Rd8 11.Nc3+=) 9.Nf3= Bf3 (9...a5 10.Be2=) 10.gf3+= Ne5 (10...c6 11.Rg1+=) 11.Qf2 Be7 (11...c6 12.Nc3+=) 12.Kd1 (12.f4 Ned7+/–) 12...0–0 (12...Ng6 13.f4+=) 13.f4 Neg4 14.Qf3 (14.Qg2 Qd7+=) 14...Qd7 (14...a5 15.h3 Nh6 16.b5+=) 15.h3 (15.Nc3 c6+=) 15...Nh6 16.Rg1 Qe6 (16...Nf5 17.Nc3+=) 17.Bd3 White prepares the advance f5 (17.Nc3 Rac8+/–) 17...Kh8 18.Nc3 Rg8 19.Ne4 (19.Nd5 Rac8 20.b5+/–) 19...Ne4 (19...Rae8 20.Qg2 Qd7 21.b5+/–) 20.Be4 (20.Qe4 Qe4 21.Be4 Rae8+–) 20...Rad8 (20...Rae8 21.Bd5 Qf5 22.e4+–) 21.f5 Qc4 22.f6 Threatening mate... how? 22...Bf8?? (better is 22...Qb3 23.Kc1 Bf8+/–) 23.fg7+– Bg7 24.Bf6 (24.Qf6 Bf6 25.Bf6 Rg7 26.Bg7 Kg8 27.Bh6 Kh8 28.Bg7 Kg8 29.Bf6 Kf8 30.Bh7+–) 24...Rde8+= 25.Bd5 (25.Bc6 Re6 26.Bg7 Rg7 27.Rg7 Qb3 (worse is 27...Kg7 28.Bd5 Qd3 29.Be6 fe6 30.Ke1+/–) 28.Kc1 Qc4 29.Kb2 Kg7=) 25...Qd3= 26.Rg5 c5 (26...Nf5 27.Qf5 (27.Rf5?? Bf6 28.Qf1 Qf1 29.Rf1 Ba1–+) 27...Qf5 28.Rf5 Bf6 29.Rc1 (worse is 29.Rf6 Rg1 30.Kc2 Ra1–/+) 29...Rg1 30.Kc2 Rc1 31.Kc1=) 27.Rc1 (27.Bg7 Rg7 28.Qf6+/–) 27...Qa6?? (better is 27...Re3! 28.Qe3 Qf1 29.Qe1 Qe1 30.Ke1 Re8 31.Kd1 Bf6+=) 28.Qf4 Qa4 (28...cb4 29.Rg1 (worse is 29.ab4 Rb8+–) 29...Ng4 30.Rg4 Qa4 31.Ke1+–) 29.Ke1 (better is 29.Ke2 Qa6 30.d3+–) 29...Qd7?? (29...Qa3 30.Rc4 b5 31.Rg7 Rg7 32.Qh6 Reg8 33.Rg4 Qa1 34.Ba1 f6 35.Bg8 Rg8 36.Qf6 Rg7 37.Qg7) 30.Rg7 Rg7 31.Qh6 Reg8 (31...Qg4 32.hg4 Reg8 33.Be4 cb4 34.Qh7) 32.Be4 1–0. Pavicevic,L – Tanaskovic,R, corr Yugoslavia, 1980.

3.c4 Qe7 4.a3= f6 (4...Nf6 5.Nc3=) 5.e3 (5.Nc3 c6+=) 5...a5= 6.b5 b6 7.Nc3 (better is 7.d4+=) 7...d6 (better is 7...Bb7!?+=) 8.Qh5+– g6 (8...Qf7 9.Qf7 Kf7 10.Ne4+–) 9.Qd5 Ra7 10.Qe4 (worse is 10.Ne4 Bb7 11.Nd6 Qd6 12.Qd6 Bd6–/+) 10...Qe4 (10...Bb7 11.Qc2+–) 11.Ne4 Bg7 12.Nf3 Be6 (12...Nd7 13.d4+–) 13.d4 (13.Be2 h6+–) 13...h5 (13...d5 14.Nc3 Ne7 15.Rc1+–) 14.d5 (14.Bd3 Bg4+–) 14...Bf5 (14...Bg4 15.Bd3+–) 15.Bd3 (15.Ng3 Bc8+–) 15...h4 (15...Nd7 16.Rd1+–) 16.0–0 a4 (16...Nd7 17.Rad1+–) 17.Nd4 (17.Rae1 Nd7+–) 17...Be4 18.Be4 Rh6 (18...f5 19.Bf3+–) 19.Ne6 f5?? (19...Bh8+–) 20.Ng7 Kf7 21.Bf3 Nf6 (21...Nd7 22.Ne6+–) 22.Ne6 Ne4 (22...Nbd7 23.Nd8 Ke8 24.Nc6+–) 23.Be4 fe4 24.Ng5 (24.f3 Nd7+–) 24...Ke7 25.f3 1–0. Wall,Bill – WhiteHouse, internet, 2005.

3.c4 Qg5 4.b5 Nf6 5.Nh3 Qc5 6.e3 d6 (6...Be7 7.Bd4 Qf5 8.d3=) 7.Bd4 Qb4 (7...Qf5 8.Nc3=) 8.Bc3 (8.Ng5 h6 9.a3 Qa5 10.Bf6 hg5+/–) 8...Qc5= 9.Bd4 Qb4 10.a3 Qa5 11.Bc3 (11.Qc2 Bh3 12.gh3 Nbd7+/–) 11...Qb6 12.Nf4 (better is 12.Bf6 gf6 13.Nf4+=) 12...h6?? (12...Nbd7 13.d3+=) 13.Be2 (13.Bf6 gf6 14.Nd5 Qa5 15.Nf6 Kd8 16.Ne4 Be6+–) 13...Bf5? (13...Nbd7 14.0–0+=) 14.0–0 (14.Bf6 gf6 15.Nd5 Qa5+/–) 14...c6 (14...Nbd7 15.f3+=) 15.a4 (15.Bf6 gf6 16.Nc3 Nd7+–) 15...cb5 (15...Be7 16.a5 Qc7 17.f3+=) 16.ab5 (16.Bf6 gf6 17.ab5 Nd7+–) 16...Nbd7 (16...d5 17.cd5 Qd8 18.Bc4+/–) 17.Bd4 Qc7 18.Nc3 (18.Ba7?! b6 19.Qa4 g5=; 18.Ra7?! Ra7 19.Ba7 b6+=) 18...Be7 (18...Qb8!? 19.Nfd5 Nd5 20.Nd5+–) 19.Ncd5+– (19.Ba7?! b6 20.Qa4 Bd8+/–; 19.Ra7?! Ra7 20.Ba7 b6+/–) 19...Nd5 (19...Qd8 20.b6! 0–0 21.ba7+–) 20.Nd5 (20.cd5?! Bf6 21.Rc1 Qd8 22.Bf6 Nf6+=) 20...Qc8 (20...Qd8 21.Bg4 (21.Ra7?! Ra7 22.Ba7 0–0+–; worse is 21.Ba7 Nf6+–; 21.Ne7?! Qe7 22.f3 0–0+/–) 21...Bg4 22.Qg4+–) 21.Bg7 (better is 21.b6!? Bd8 22.Ra7 Rg8+–) 21...Rg8 22.Bh6 (22.Ne7?! Ke7 23.Bh6 Bh3+=) 22...Nf6 (22...Bh3 23.Nf4 Nf6 24.f3 (24.Nh3 Qh3 25.g3 Rh8–/+) 24...Bg2 25.Ng2+/–) 23.Ne7 Ke7 24.Bf4 Ke8 (24...a6 25.d3 Qe6 26.Ra5+–) 25.d3 (25.Bd6 Qe6 26.c5 Nd7+–) 25...d5 (25...ed3 26.Bd3 d5 27.Be2+–) 26.cd5 (better is 26.de4!? de4 27.Qd4+–) 26...Nd5 27.Bg3 (27.Rc1 Nc3 28.Qd2 Ne2 29.Qe2 Qd7+–) 27...ed3? (better is 27...Nc3!? 28.Qc2 Ne2 29.Qe2 ed3+/–) 28.Bd3+– Bd3 (28...Nc3 29.Qc2 Bd3 30.Qd3+–) 29.Qd3 Ne7 (29...Rg5 30.Rfc1 Qd7 31.Qd4+–) 30.Qe4 (better is 30.Rfc1 Qf5 31.Qf5 Nf5 32.Rc7 Ng3 33.fg3+–) 30...b6?? (30...Rg4 31.Qf3 Rc4+–) 31.Bd6 Qe6 (31...Qd8 32.Be7 Rg4 33.Qg4 Qe7 34.Qg8 Qf8 35.Qg3+–) 32.Qa8 Kd7 (32...Qc8 33.Qa7 Nf5 34.Rac1+–) 33.Qa7 Kd6 34.Qb6 Ke5 35.f4 (35.Qd4 Kf5 36.Qf4 Kg6+–) 35...Kf6 (35...Kf5 36.Qc5 Nd5 37.Qc2 Qe4 38.Qe4 Ke4 39.Ra4 Kd3 40.Rd1 Ke3 41.Rd5+–) 36.Qd4 Kg6 37.Ra6 Qa6 38.ba6 Nf5 39.Qe5 f6 40.Qe6 (40.Qe4 Rg7 41.g4 Rf7 42.gf5 Kh5 43.Qg2 Rg7 44.Qg7 Kh4 45.Qg3 Kh5 46.Qh3) 40...Rf8 41.e4 Ne3 42.Rf3 Nd1 (42...Rd8 43.Rg3 Ng4 44.Rg4 Kh5 45.Qf5 Kh6 46.Qg6) 43.Rg3 Kh5 44.Qh3 1–0. GuestGBBL – GuestTCTZ, freechess.org, 2017.

3.c4 h5 4.e3 Bb4 5.Bg7 Rh7 6.Bc3 a5 7.a3 Bc3 8.Nc3 (worse is 8.dc3 Nf6+=) 8...c6? (better is 8...Nf6!?+=) 9.Ne4+– d5 10.cd5 cd5 11.Nc3 (11.Nd6 Qd6 12.Qc2 Rh6 13.Qc8 Qd8 14.Bb5 Nc6 15.Qb7 Nge7+–) 11...Nf6 12.Nf3 Bg4 13.h3 Bf3 14.Qf3 (14.gf3?! Nc6+/-) 14...d4 15.Bb5 Kf8 16.Qb7 Nbd7 (16...dc3 17.Qa8 Qd2 18.Kf1+–) 17.Nd5 (17.ed4!? Qe7 18.Kf1 Rb8+–) 17...Rb8 18.Qc6 Ne5 19.Qf6 (19.Nf6?! Nc6 20.Nh7 Kg8 21.Bc6 Kh7 22.Be4 Kg7+=) 19...Qd5 20.a4 Rb5? (better is 20...Rg7 21.Rh2 Rd8+–) 21.ab5 Nd3 (21...Rg7 22.Rf1+–) 22.Ke2 Qb5 (22...Ne5 23.Rhc1 (23.Ra5?? Qc4 24.Kd1 Qb3 25.Ke1 Qb1 26.Ke2 d3) 23...Qb5 24.d3 Qb2 25.Kf1+–) 23.Rhb1 (better is 23.Qd8 Kg7 24.Ra5 Nf4 25.Kf3+–) 23...Nf4 (23...Nc1 24.Kf3 Nb3 25.Qd8 Kg7 26.Rb3 Qb3 27.Qd4 Kg6 28.Ra5 Qb7 29.e4 Qb3 30.Qc3 Qc3 31.dc3 Rh8+–) 24.Kd1 (better is 24.Kf3 Qe8 25.Qd6 Kg7 26.Qd4 f6 27.Qf4 Qc6 28.Qe4 Qe4 29.Ke4+–) 24...Qe2 25.Kc2 d3?? (better is 25...Qc4 26.Kb2 Qb4 27.Kc1 Qc4 28.Kd1 Qe2 29.Kc1 Qc4 30.Kd1 Qe2=) 26.Kb3 (26.Kc1 Qf1 27.Kb2 Qg2+–) 26...Ne6 (26...Nd5 27.Qd8 Kg7 28.Qg5 Kf8+–) 27.Ra5 Ke8 28.Ra7 Nd4 29.Qd4 Qf2 30.Ra8 Ke7 31.Qd8 Ke6 32.Ra6 Ke5 33.Qd6 Ke4 1–0. Fournier,Frederic – Chalvet,Philippe, Partie Libre (Active), 1995.

3.d3 e3 4.Nf3 (4.a3 ef2 5.Kf2 d5+=) 4...ef2 (4...Bb4!? 5.Bc3 Bc3 6.Nc3 ef2 7.Kf2 d5–/+) 5.Kf2+= Nf6 (5...Bb4?? 6.Bg7 Nh6 7.Bh8 (7.Bh6?! Qf6 8.c3 Bc5 9.d4 Qh6 10.dc5 Nc6+–) 7...Ng4 8.Kg1+–) 6.a3 (6.Qd2 Ng4 7.Kg1 a5=) 6...d5 7.e3 Bd6 (7...Ng4 8.Ke2+=) 8.Be2 (better is 8.Nc3!?+=) 8...Ng4–/+ 9.Kg1 Ne3 10.Qd2 Nf5 (10...Qe7 11.c4–/+ (11.Bg7?? Rg8–+)) 11.Nc3 (11.c4 0–0–/+) 11...c6 12.Re1 (12.Kf2 0–0–/+) 12...0–0 13.Kf2 (13.Na4 a5 14.Nc5 b6–+) 13...Qc7 (better is 13...Re8–/+) 14.Bd1?? (better is 14.Nd1–/+) 14...Bf4–+ 15.Qe2 Be6 (better is 15...Be3 16.Qe3 Ne3 17.Re3 Bg4–+) 16.Ne5?? (better is 16.g3 Bd6 17.Kg2–/+) 16...Qb6 17.Kf1 (17.Kf3 g5 18.g3 Nd4 19.Kg2 Ne2–+) 17...Ne3 (17...Bh2 18.g4 Ng3 19.Kg2 Ne2 20.Re2 Be5 21.Re5–+) 18.Kg1 (18.Qe3 Be3 19.Na4 Qa6 20.Re3 Qa4–+) 18...Nd1 19.Kf1 0–1. Olsen,Birger – Bjornstad,Leif, Vadsosjakken Gruppe B, 2002.

3.d4? ed3 4.Qd3 Bb4 5.c3 Be7 6.Nf3 Nf6 7.e4 0–0 8.h3 Nc6 9.e5 Ne8 10.Nbd2 b6 11.Qe4 Bb7 12.Bb5 g6 13.0–0 Qb8 14.Qd3 a6 15.Bc6 Bc6 16.c4 Bf3 17.Qf3 c6 18.Qg4 Ng7 19.Ne4 c5 20.Rfd1 h5 21.Qd7 Re8 22.Rd3 Ra7 23.Qa4 Rc8 24.Rg3 (24.Rad1 b5 25.Qc2 Ne6+/–) 24...Bh4 (24...Nf5!? 25.Rb3 Nd4 26.Bd4 cd4=) 25.Rf3 Be7 26.Qc2 Rd7 27.Rg3 Bh4 28.Rf3 Nf5 29.Nf6 (better is 29.Rf5!? gf5 30.Nd6 Rd6 31.ed6 Qd6 32.Rd1+=) 29...Bf6= 30.ef6 Nh4 31.Rg3 Nf5?? (better is 31...Qf4 32.Re3 Nf5=) 32.Re1 (32.Qf5 Qg3 33.Qd7+– (33.fg3? gf5 34.Be5 Re8–+)) 32...Ng3–+ 33.Be5?? (33.fg3 Qg3 34.Qc1–+) 33...Ne2! 34.Re2 Qb7 35.Kh2 Rcd8 36.Re1?? Rd2–+ 37.Qe4 Qc8 38.f3? Ra2 39.Qf4 Ra4 40.Bc7 Rd4?? 41.Re4 Rd7 42.Be5 Ra2–+ 43.Kg3?? Rdd2 44.Kh4 Rg2 45.Bd6 Rh2! 46.Qg3 Rhg2 47.Qe1?? Rh2 48.Bh2 Rh2?? 49.Qg3 Rh1–+ 50.Re5 a5 51.f4 a4 52.Re7?? Qc6 53.f5?? Kh7 54.Rf7 Kg8 55.fg6 Qe4 56.Kh5 Qf5?? 57.Kh6 Rh3–+ 58.Qh3 Qh3 59.Kg5 a3 60.Ra7? Qe3 (60...Qe3 61.Kf5 Qf3 62.Ke5 Qh5 63.Ke6 Qg6 64.Ra8 Kh7 65.Ra3 Qe4 66.Kd6 Kg6–+) 0–1. 488 – DGJ, ChessWorld.net, 2012.

3.d4? d5 4.e3 (--> 3.e3 d5 4.d4).

3.e3 Qe7 4.Qg4 (4.b5+=) 4...Qb4 (better is 4...Nc6 5.Bg7 d6=) 5.Bg7+/– Nf6?? (better is 5...Nh6 6.Bh6 Bh6+/–) 6.Bf6+– Qb2 (6...h5 7.Qf5 Rh6+–) 7.Qe4 1–0. marekt – mimix312, GameColony.com, 2002.

3.e3 Be7?? 4.Bg7+– Bf6 5.Bh8 Bh8 6.Nc3 Nf6 7.d4 d6 8.Bc4 c6 9.Nge2 Bg4 10.h3 Bd7 11.Nf4 d5 12.Be2 Bf5 13.0–0 Nbd7 14.a4 Qc7 15.a5 a6 16.Na4 0–0–0 17.c4 Kb8 (17...dc4 18.Bc4 Ne5 19.Nb6 (19.de5?! Rd1 20.Nb6 Qb6 21.ab6 Ra1 22.Ra1 Nd7+–) 19...Kb8 20.Qc2 Nc4 21.Qc4+–) 18.cd5 Nd5 19.Nd5 cd5 20.Rc1 Qd6 21.Nc5 (21.b5!? Rg8 22.Kh1 Qe6+–) 21...Rg8 22.Bg4 Qg6 23.g3 Nf6 24.Bf5 Qf5 25.Kh2 Rg6 (25...Ne8 26.Qa4 Nd6 27.Qd7 Qd7 28.Nd7 Ka7 29.Nb6+–) 26.Kg2 (better is 26.Qc2!? Ka7 27.Nb7 Qd7+–) 26...Rh6 27.Rh1 Rg6 28.Qe2 Nh5 29.Nd7! Ka7 (29...Qd7 30.Qh5 Deflection) 30.Nb6 Bd4 (30...Rg8 31.Kh2+–) 31.Nc8 Kb8 32.Ne7 Qf3 33.Qf3 ef3 34.Kf3 Rf6 (34...Be5 35.Rc8 Ka7 36.Rf8+–) 35.Kg4 Rf2 36.ed4 Nf6 37.Kh4 Ne4 (37...Rd2 38.Rc8 Ka7 39.Rh8 Rd4 40.g4+–) 38.Rc8 (38.Rhf1!? Rf1 39.Rf1 Nd6+–) 38...Ka7 39.Nd5 Rf5 (39...Nd6 40.Rg8 Re2+–) 40.Nb6 1–0. Koshelev,Vladimir (1915) – Kornev,Sergey (1730), Voronezh RUS, Zagorovsky Mem2012, 2012.

3.e3 Nf6 4.a3 d5 5.c4 c6 (--> 3.c4 c6 4.e3 Nf6 5.a3 d5).

3.e3 Qh4 4.g3 Qg5 (4...Qe7 5.b5+=) 5.a3 (5.Nh3 Qd8+/–) 5...Qf5 (5...Nc6!?+=) 6.Bh3+/– Qf3?? (better is 6...Qg5 7.Nc3 Nf6+/–) 7.Nf3+– ef3 8.Qf3 Nc6 9.0–0 (9.Nc3 f6+–) 9...h5 (9...a6 10.Bd4+–) 10.c4 (10.Nc3 f6+–) 10...h4 (10...d6 11.Bc8 Rc8 12.Nc3+–) 11.Bg4 (11.Nc3 Ne5 12.Qe4 Rh5+–) 11...hg3 (11...d6 12.Bc8 Rc8 13.Nc3+–) 12.fg3 d6 13.Qf7 Kd8 14.Qf8 1–0. Trkn – Kent, itsyourturn.com, 2000.

3.e3 h5 4.d4 d6 5.Nd2 Bg4 6.Be2 Be2 7.Ne2 f5 8.Nf4 g5 9.Ne6 Qe7 10.d5 c6?? 11.Bh8 Qh7 12.0–0 cd5 13.Bb2 Ke7 14.Nc7 Bg7 15.Bg7 Qg7 16.Na8 f4 17.Nc7 Kd7 18.Nd5 Ke6 19.Qh5 Kd5 20.c4 Ke5 21.Qe8 Kf6 22.Qb8 fe3 23.fe3 Kg6 24.Qd6 Nf6 25.Ne4 Kf7 26.Rf6 Kg8 27.Rg6 (27.Rg6 Qg6 28.Qg6 Kf8 29.Rf1 Ke7 30.Qd6 Ke8 31.Rf8#) 1–0. makaveli1982 – neilpdalal, internet, 2007.

3.Be5 Bb4?? 4.Bg7+– e3 5.fe3 Qh4 6.g3 Qg5 7.Bh8 f6 (7...Qe3 8.a3 Qe4 9.Nf3+–) 8.Nf3 Qg6 9.Nh4 Qf7 10.Bg2 Nc6 11.0–0 Nh6 (11...d5 12.c3 Bd6 13.Qb3+–) 12.Bf6 1–0. Heini – chessenemy, internet, 2016.

3.Be5 Nc6 4.Bb2 Nb4–/+.

3.Be5 d6 4.Bc3 d5 5.e3 Nf6 6.Be2 Be7 7.b5 0–0 8.f3 c5 9.fe4 Ne4 10.Be5? Nd7?? 11.Bb2 Ndf6 12.Be5 Nd7 13.Bb2 Bh4 14.g3 Ng3?? 15.hg3+/– Bg3 16.Kf1 f5 17.Rh3 f4= 18.Nf3 Nf6=+ 19.Rh1 Ne4 20.d3?? Nf2–+ 21.Rh7 Kh7 22.Qe1 Nd3! 23.Bd3 Kg8 24.Qc3 d4?? 25.Bc4 Kh8 26.ed4 Bg4 27.Ne5 Bh5 28.Qa3?? Qh4 29.Bd5?? Qh3 30.Bg2 Qh2?? 31.Nd2+= f3 32.Ndf3?? Bf3 33.Ng6?? Kh7 34.Nf8 Rf8 35.Qd3 Be4 36.Ke2 Bd3 37.Kd3–+ Qg2 38.Rc1 Qf3 39.Kc4 Bf4 40.Re1–+ Kg8 41.dc5 g5 42.Bc3 g4 43.Kb4 g3 44.c6 bc6 45.bc6 Qc6 46.Kb3 g2 47.Bb4–+ Qf3 48.c3 Qf2 49.Bf8 Kf8 50.Rd1 g1Q 51.Rg1 Qg1 52.a3 Ke7 53.c4 Kd6 54.Ka2 Kc5 55.a4 Qe3 56.a5 Kc4 57.Ka1 Qb3 58.a6 Be5# 0–1. Dopey (2170) – idoffs (2350), ICS rated light match, 1998.

3.f3 b6 4.fe4 Qh4=+ 5.g3 Qe4 6.Nf3 Qb4 7.Qc1 Bb7 8.Bg2 d5 9.0–0 Bc5 10.d4 Be7=+ 11.a3 Qa4 12.Qf4 Bd6 13.Qg4 g6–/+ 14.Ng5 f5 15.Qh4 Qc2–+ (15...Qc2 16.Bc3 h6–+ (16...Qe2? 17.Re1 Qe1 18.Be1+–)) 0–1. Galagus – real1, playchess.de, 2002.

3.g3 a6 4.a3 d5 (4...Nf6 5.d3+=) 5.d3= ed3 (5...Bf5 6.de4 Be4 7.Nf3=) 6.Qd3 (6.ed3 a5=) 6...Bg4 (6...Ne7 7.Nd2=) 7.Nc3 c6 (7...Nf6 8.e4 de4 9.Ne4=) 8.Bh3 (8.e4 Qe7=) 8...Bh3 9.Nh3 Nf6 10.e4 Be7 (10...a5 11.ed5 ab4 12.ab4 Ra1 13.Ba1 Bb4 14.0–0=) 11.0–0–0 (11.ed5 a5 12.b5 cd5+/–) 11...de4 (11...Qd7 12.Nf4 a5 13.ed5 ab4 14.ab4 0–0+= (worse is 14...Bb4 15.Ne4 Ne4 16.Qe4 Qe7 17.Qe7 Ke7 18.Bg7+/–)) 12.Ne4+/– Qd3 (12...0–0 13.Qd8 Bd8 14.Bf6 Bf6 15.Nf6 gf6 16.Rhe1+/–) 13.Nf6 (13.cd3?! Nbd7=) 13...Bf6 14.Rhe1 (14.cd3?! Nd7=) 14...Kd7 (14...Kf8 15.Rd3 (15.cd3?! Nd7=) 15...Bb2 16.Kb2+–) 15.Rd3 (15.cd3?! Bb2 16.Kb2 h6+=) 15...Kc7 (15...Kc8 16.Bf6 gf6 17.Re7+–) 16.Bf6 gf6 17.Re7 Kb6 18.Nf4 (better is 18.Rf7 Ra7+–) 18...Rf8 (18...a5 19.ba5 Ka5 20.Rb7 Rf8+–) 19.Rd6 a5 20.Nd5 Ka7 21.Nc7 (21.Nf6?! ab4 22.ab4 h5+–) 21...ab4 22.ab4 Na6 23.Na8 Ka8 24.c3 Ka7 (24...h5 25.Rf6 Kb8 26.Rff7 Rf7 27.Rf7+–) 25.Rc6 Nb8 (25...h5 26.b5 Nb8 27.Rcc7+–) 26.Rf6 Ka8 27.Rff7 Rf7 28.Rf7 Nc6 29.Rh7 Ne5 30.f4 Nd3 (30...Ng4 31.f5 Ka7 32.Rg7+–) 31.Kc2 Nf2 32.h4 Ka7 (32...Ng4 33.h5 Ka7 34.h6+–) 33.Rg7 Kb6 34.h5 Kc6 35.h6 Ne4 36.h7 Nf6 (36...Kb6 37.h8Q Nd6 38.Qd8 Ka7 39.Qd6 Ka8 40.Qd5 Ka7 41.Qb7) 37.h8Q 1–0. Janek – Alex7, internet, 2017.

3.g3 d5 4.Bg2 Nf6 5.b5 Be7 6.Nh3 (6.d3 0–0 7.de4 Ne4+=) 6...Be6 (6...0–0!?–/+) 7.Nf4= Qd7 (7...a6 8.a4=) 8.Ne6 (8.Nc3!?+=) 8...Qe6= 9.e3 Nbd7 10.d4 (10.Nc3!?+=) 10...Nb6 11.Nd2 Na4 12.Qc1 (12.Rb1 0–0–/+) 12...Nb2 (12...a6 13.ba6 Ra6–+ (13...Nb2? 14.ab7 Rb8 15.Qb2+–)) 13.Qb2+= Rc8 (13...h5 14.c4 dc4 15.Rc1+=) 14.0–0= 0–0 15.Rfc1 c5 16.bc6 bc6 (16...Rc6 17.Qb7 Rfc8 18.c4 dc4 19.d5 (worse is 19.Qa7 R6c7 20.Qa5 c3–/+) 19...Nd5 20.Be4=) 17.c4 Rb8 18.Qc2 Rfc8 19.c5 Rb7 (19...Ng4 20.h3 Nh6 21.Rcb1=) 20.Rcb1 Rcb8 21.Rb7 Rb7 22.Rb1 Qc8 23.Bf1 Qb8 (23...g6 24.Be2=) 24.Rb7 (24.Ba6 Rb4+=) 24...Qb7= 25.Qb3 Qb3 (25...Qc7 26.Be2=) 26.Nb3+= Nd7 27.Na5 Nb8 28.Bh3 Bd8 29.Nb7 Bc7 30.Bc8 (30.Nd6 g6=) 30...Kf8 31.Kg2 (31.Nd6 Ke7 32.Nf5 Kd8=) 31...Ke7+= 32.Kh3 g6 33.Kg4 h6 34.f4 (34.Kh3 Nd7+=) 34...Nd7 (better is 34...ef3 35.Kf3 Nd7–/+) 35.Bd7?? (better is 35.Kh4+=) 35...Kd7–+ 36.h4 (36.Kh3 Kc8 37.Nd6 Bd6 38.cd6 Kd7–+) 36...f5 37.Kh3 Kc8 38.h5 (38.Nd6 Bd6 39.cd6 Kd7–+) 38...gh5 (38...Kb7?? 39.hg6 h5 40.g7+–) 39.Nd6 (39.Kh4 Kb7 40.Kh5 Ba5–+) 39...Bd6 40.cd6 (40.Kg2 Bc7 41.Kf2 Kb7–+) 40...Kd7 41.Kh4 (41.Kg2 Kd6 42.Kf2 c5 43.dc5 Kc5–+) 41...Kd6 (better is 41...c5!? 42.dc5 d4 43.ed4–+) 42.Kh5 c5 43.dc5 Kc5 44.Kh6 (44.g4 d4 45.gf5–+) 44...d4 45.ed4 Kd4 46.g4 fg4 47.f5 g3 (47...Ke5 48.f6 Kf6 49.Kh5 Kf5 50.Kh4 Kf4 51.a3 e3 52.Kh5 g3 53.Kg6 g2 54.Kf6 g1Q 55.Ke6 e2 56.Kd5 e1Q 57.Kc4 Qc1 58.Kd5 Qb6 59.a4 Qcc5) 48.f6 g2 49.f7 g1Q 50.f8Q Qh2 51.Kg5 Qe5 (better is 51...Qg3!? 52.Kh6 e3 53.Qd8 Ke4 54.Qa8 Kd3 55.Qd5 Ke2 56.Qd4–+) 52.Kg4 Qe6 (52...Ke3 53.Qf1 Qe6 54.Kg5 Qg8 55.Kh4 Qd8 56.Kg4 Qd7 57.Kg5 Qg7 58.Kh4 Qh6 59.Kg4–+) 53.Kg3?! (53.Kf4 e3 54.Qb4 Kd3 55.Qb5 Kd2 56.Qb2 Kd1 57.Qh8–+) 53...Qe5 (53...Qa2!? 54.Qf6 Kd3 55.Qe7–+) 54.Kg4 Qe6 55.Kg3 Qg6 (better is 55...Qa2 56.Qg7 Kd3 57.Qd7 Ke3–+) 56.Kf4 e3?? (56...Qb6 57.Qh8 Kd3 58.Qh3 e3 59.Qf1 Kd2 60.Qg2 e2 61.Qd5 Kc1 62.Qc4 Kb1 63.Qe2 Qb4 64.Kg5 a5=) 57.Qb4= Kd5 58.Qb3 Kd4 59.Qb2 Kd5 60.Qb3 Kd4 61.Qe3 Kc4 62.Qb3 Kc5 63.Qa3 Kb6 ½–½. Solari,Pablo (1665) – Dias Da Silva,Airton, 3rd IRT, 2012.

3.a3 b5

4.Nc3+= a6 5.Ne4 d5 6.Nc5 Bc5? (better is 6...Nf6+=) 7.Bg7+– (7.bc5?! Nf6+=) 7...Bd4 8.Bd4 Nf6 9.a4 Bd7 (9...ba4 10.e3+–) 10.ab5 (10.e3!? Nc6 11.Bf6 Qf6 12.ab5 Nb4+–) 10...Bb5 11.Nf3 Rg8 12.Ne5 Qe7 13.c3 Nc6 (13...Nfd7 14.Nd7 Nd7 15.Qb3+–) 14.Nc6 Bc6 15.e3 Ne4 (15...Bb7 16.Ra5+–) 16.Qh5 Ng5 17.h4 Ne6 18.Qh7 Rf8 19.Be5 0–0–0 20.Ba6 Bb7 21.Bb7 Kb7 22.Qd3 Kc8 23.Qb5 Rd7 24.Ra8 1–0. market (1810) – Streiff (1635), GameColony.com, 2002.

4.Nc3+= d5 5.Nb5 Nf6 6.c4 c5 7.Bf6 Be7?? (better is 7...gf6 8.cd5 Bd7+–) 8.Bg7 Rg8 9.Be5 Na6 10.Qa4 Kf8 11.Nc3 cb4 12.Nd5 Nc5 (12...Qd7 13.ab4 Nb4+–) 13.Qc6 Bd7 (13...Bb7 14.Qh6 Ke8 15.Nc7 Kd7 16.Na8 Qa8 17.ab4 Na6 18.Qh3 Ke8+–) 14.Qh6 Ke8 15.Nc7 (15...Qc7 16.Bc7+–) 1–0. Meyer,Torben – Neffgen,Dieter, T0076 DESC, 2003.

3.a3 Nc6

4.d3 Nf6 5.de4 Be7 (5...Ne4!? 6.Nf3 Qe7=) 6.Nc3 d6 7.Nf3 0–0 8.e3 a5 9.b5 Ne5 10.Be2 c6 11.0–0 cb5 12.Nd2 Qb6 13.Nb5 Ne4?? (better is 13...Qd8+/-) 14.Ne4+– Bg4 1–0. Bacino,Gustavo (2050) – Sanchez,Hugo, IECG, 2009.

4.e3 d5 5.c4 (5.Ne2 Nf6=) 5...dc4+= 6.Bc4 (6.Qc2 Bf5+=) 6...Qg5 7.g3 Qf5 (7...Bf5 8.h4 Qe7 9.Ne2=) 8.Ne2 (8.Qc2 Be6=) 8...b5 (8...Be6 9.Be6 fe6 10.0–0=) 9.Bb3= a5 (9...Nge7 10.0–0 Bb7 11.Bc2+/–) 10.Qc2+= Bb7 11.ba5 (11.Nd4 Nd4 12.Bd4 Kd8+=) 11...Ra6 (11...Nf6 12.Bf6 gf6 13.0–0 Ra5 14.Nbc3 Ba3 15.Ne4+= (15.Qe4?! Qe4 16.Ne4 f5 17.Nf6 Ke7 18.Nd5 Kd7=)) 12.Nbc3 (12.0–0 Na5 (12...Ra5? 13.f3 Nf6 14.Nbc3+–) 13.Nd4 Qd7 14.Nb5 Nb3 (14...Qb5?? 15.Ba4 Qa4 16.Qa4 Bc6 17.Qc2+–) 15.Qb3 Ne7+/–) 12...Ne5 13.Nd4 Qd7 14.Ncb5 Nd3 15.Kf1 c5 16.Bc4 (16.Ne2 A) 16...Qb5?? 17.Ba4 Ra5 18.Bb5 Rb5 19.Rb1+–; B) 16...Nb2 17.Qb2 Be7 18.Ba4+/– (worse is 18.Qg7 Bf6 19.Qf7 Qf7 20.Bf7 Kf7+=); C) 16...Nh6 17.h3 C1) 17...Qb5 18.Ba4 Ra5 19.Bb5 Rb5 20.Rb1+–; C2) 17...Nb2 18.Qb2 Be7 19.Nbc3+/– (19.Qg7?! Bf6 20.Qh6 Ba1=); C3) 17...Ra5+=) 16...Rf6 (better is 16...cd4 17.Bd4 Rc6+=) 17.Bd3?? (17.Na7 Ba6 18.Rb1 Bc4 19.Qc4 Qa7 20.Nc6 Rc6 21.Qe4 Ne7 22.Qd3 Qa5 23.Kg2+=) 17...ed3–+ 18.Qd3 Bh1 (18...Bh1 19.Kg1 Bf3 (19...cd4 20.Kh1 Rf2 21.Bd4=) 20.Nc7 Kd8–+; 18...cd4?! 19.e4–/+) 0–1. Czekaj,Christophe (1660) – Laine,Jari (1850), FICGS, 2008.

3.a3 Nf6

(--> 1.b4 e5 2.Bb2 Nf6 3.a3 e4).

4.c4 (--> 3.c4 Nf6 4.a3).

4.c4 c6 5.e3 (--> 3.c4 c6 4.e3 Nf6 5.a3).

4.c4 c6 5.e3 d5 (--> 3.e3 d5 4.a3 Nf6 5.c4 c6).

4.d3 d5 5.de4 Ne4 6.Nd2 (--> 3.a3 d5 4.d3 Nf6 5.de4 Ne4 6.Nd2).

4.e3 d5 (--> 3.e3 d5 4.a3 Nf6).

3.b5 b6

4.Nc3 Nf6 5.e3 Bb7 (5...a6 6.d3 Bb7 7.ba6 Na6 8.de4 Ne4 9.Ne4 Be4 10.Nf3+=) 6.Nge2 d5 (6...a6 7.Ng3=) 7.Nd4 g6 (7...a6 8.d3=) 8.Be2+= Bg7 9.0–0 0–0 10.f4 (10.f3 c5 11.bc6 Nc6 12.Nc6 Bc6=) 10...Nbd7 (10...c5 11.bc6 Nc6 12.Ncb5=) 11.f5+= g5 (11...Nc5 12.a4+=) 12.Qe1 Ne5 (12...h6 13.Qg3+=) 13.Qg3 Nfd7 14.a4 Nc4 (14...c5 15.bc6 Nc6 16.f6 Nd4 17.fg7 Ne2 18.Ne2+/–) 15.Bc4+/– dc4 16.a5 Be5 (16...ba5!? 17.Rfb1 Nb8+=) 17.Qg4+/– Nf6 18.Qg5 Kh8 19.Ne6 Nd5?? (19...fe6 20.fe6 Ng4 21.Rf8 Qf8 22.Qg4 Qh6+–) 20.Nd8 (20.Nd8 f6 21.Qh4 Rad8 22.ab6 ab6 23.Ra7+–) 1–0. Wall,Bill – Bailey,John, chess.com, 2010.

4.c4 Bb4?? 5.Bg7+– f5 6.e3 d5 7.Bh8 Be6 8.Qh5 Bf7 9.Qf5 Qe7 10.Qe5 Qe5 11.Be5 Nd7 12.Bc7 Rc8 13.Bg3 dc4 14.Nc3 Bc3 15.dc3 Bh5 16.Be2 Bf7 17.Bg4 Rc5 18.Bd7 Kd7 19.Ne2 Rb5 20.0–0 Bh5 21.Rfd1 Kc8 22.Rd2 Kb7 23.Nf4 Nf6 24.Nh5 Nh5 25.Bh4 Ka6 26.Rad1 Ng7 27.Rd4 Nf5 28.Re4 Ka5 29.Rc4 Nd6 30.a4 Nc4 31.ab5 Kb5 32.Rd7 a5 33.Rh7 Ka4 34.Bd8 Kb3 35.Rh6 b5 36.Ra6 a4 37.Be7 Kc3 38.e4 Kd4 39.f3 Ke5 40.Kf2 a3 41.Ba3 Nd2 42.Bd6 Kd4 43.h4 b4 44.Bb4 1–0. gtate (1765) – elf (1675), net–chess.com, 2002.

4.e3 Nf6 (--> 1.b4 e5 2.Bb2 e4 3.e3 Nf6 4.b5 b6).

3.b5 c6

4.a4 a5 5.e3 (5.d3 e3=) 5...d5 6.c4 Nf6 7.bc6 Nc6 8.Bf6 (8.Nc3 d4 9.ed4 Nd4+=) 8...Qf6 (8...gf6?! 9.Nc3 dc4 10.Bc4=) 9.Nc3 dc4 10.Bc4 Nb4 (10...Qg6 11.Qb1 f5 12.g3+=) 11.Nge2= (11.Ne4? Qa1 12.Qa1 Nc2 13.Ke2 Na1–+) 11...Qg6 (11...Nd3 12.Bd3 ed3 13.Nf4+=) 12.Nf4+= Nd3?? (better is 12...Qf5+=) 13.Bd3+– Bg4 (13...Qh6 14.Bb5 Kd8+–) 14.Bb5 Kd8 15.Ng6 Bd1 16.Nh8 f5 (16...Bb3 17.Ne4 f5 18.Ng5+–) 17.Rd1 Ke7 18.Nd5 Ke6 1–0. GuestNFTH – sirbastl, freechess.org, 2017.

4.a4 cb5 5.ab5= a6 6.e3 Qb6 7.d4 d5= 8.Nc3 Bb4=+ 9.Nge2 Nf6 10.g3? 0–0 11.Bg2 Bc3 12.Nc3=+ Be6 13.0–0 Nbd7 14.ba6?? ba6 15.Na4 Qb4?? 16.c3?? Qb7 17.Ba3 Rfc8 18.Rb1 Qa7 19.Nc5 Nc5 20.Bc5 Qc7 21.Rb6 a5 22.Qa4 Rcb8 23.Rfb1 Rb6 24.Rb6 Qc8 25.Rb5? Bd7–+ 26.Bf1 Bb5 27.Bb5 Nd7?? 28.Bc6 Rb8 29.Bd7+= Rb1 30.Kg2 Qc7?? 31.Qc6 Qd8 32.Qd5 a4 33.Bc6 Qd5 34.Bd5 Ra1 35.Be4 a3 36.d5 a2–+ 37.d6 Rg1 38.Kg1 a1Q 39.Kg2 Qc3 40.d7 Qd2?? 41.Bb6 Qd7–+ 42.Bd4 f5 43.Bf3 g5 44.h3 g4 45.hg4 fg4 46.Be2 Qd5 47.Kg1 h5 48.Kf1?? Kf7 49.Bd3–+ Ke6 50.Ke2 Qf3 51.Ke1 Kd5 52.Be2 Qh1 53.Kd2 h4 54.gh4 Qh4 55.Kd3 Qf2?? 56.e4+– Kd6 57.Bf2 g3 58.Bg3 (58.Bg3 Kc5 59.e5+–) 1–0. MasterofDisaster – Shiner, Live Game Caissa's Web, 2005.

4.a4 Qb6 5.e3 d5 6.c4 Be6 7.a5 (7.cd5 cd5 8.a5 Qd8=) 7...Qc7 (7...Qd8 8.cd5 cd5=) 8.Qc2 (better is 8.cd5!? cd5 9.Ne2=) 8...cb5–/+ 9.d3 (9.c5!?–/+) 9...ed3–+ 10.Bd3 bc4 (10...dc4 11.Bh7 Bb4 12.Nd2–+) 11.Nf3 (11.Bh7 Nc6 12.a6 Nb4 13.Qa4 Bd7–+) 11...Bb4 (11...h6 12.0–0–/+) 12.Kf1 (better is 12.Kd1 Nf6 13.Bf6 gf6 14.Bh7 Ba5 15.Bf5–+) 12...Nc6 (12...Nf6 13.Bf6 gf6 14.Bh7 Ba5 15.e4 Rh7 16.ed5–+) 13.Bh7? (better is 13.Bg7!? cd3 14.Qd3=) 13...Nf6–+ (13...Na5?! 14.Bg7 Rh7 15.Qh7+=) 14.Bf6 gf6 15.a6 b6 16.Na3 Ne5 (16...Ba3 17.Ra3 b5 18.Ke1–+) 17.Bf5? (17.Qa4 Bd7 18.Qb4 Nf3 19.Nb5+=) 17...Nf3–+ 18.gf3 Rh2?? (better is 18...Qd7! 19.Be6 fe6 20.Qg6 Qf7 21.Qf7 Kf7–+) 19.Rh2–/+ Qh2 20.Be6? (better is 20.Qa4 b5 21.Qb5 Kd8 22.Qb4 Qh1 23.Ke2 Qa1 24.Qd6 Ke8 25.Qc6 Ke7 26.Qa8 Bf5 27.Qa7 Ke6 28.Qb6 Kd7 29.Qb7 Kd6 30.a7 Bd3 31.Kd2 Qa2 32.Kd1 Qa1 33.Nb1 Qa4 34.Ke1 Qa5 35.Nd2 Qa1 36.Nb1 Qa5 37.Kd1 Qa4 38.Ke1 Qa5=) 20...Qh1+– 21.Ke2 Qa1 22.Nb5?? (22.Qa4 Kf8 23.Qb4 Kg7 24.Bd5+/–) 22...Qe1 0–1. Fredek (2090) – Sabon (1955), Freundschaftspartie, 5m + 0s, 2005.

4.c4 d6 5.e3 cb5 6.cb5 Nf6 7.a4 Nd5 8.Bc4 Be6 9.Ne2 Ne3 10.de3 Bc4 11.Nd2 Be6 12.Ne4 a6 13.0–0 d5 14.Nd2 Bd6 15.g3 0–0= 16.Nd4 Bh3 17.Re1 Qd7 18.N2f3 Bg4 19.Qd3 h6 20.Nd2 Bb4 21.Nc2 Bd2 22.Qd2 ab5 23.ab5 Ra1 24.Ba1 Qb5?? 25.Bg7 Kg7 26.Qd4 Kh7 27.Qg4 Nc6 28.Qf5 Kg7 29.Rd1 Ne7? 30.Qe5+– Kg8 31.Qe7 Qb3? 32.Qc7 f5 33.Rf1 Rf7 34.Qc5 b6 35.Qc6 Kg7 36.Nd4 Qc4 37.Rc1 Qc6 38.Nc6 Rc7 39.f3 b5 40.Rc2 Kf8 41.Nd4 Rb7 42.Nf5 h5 43.Rc8 (43…Kf7 44.Nd6 Ke7 45.Nb7+–) 1–0. valpa – SHOOTER, playchess.de, 2003.

3.b5 d5

(--> 1.b4 e5 2.b5 d5 3.Bb2 e4).

4.a4 Nf6 5.e3 (--> 1.b4 e5 2.Bb2 e4 3.e3 Nf6 4.b5 d5 5.a4).

4.d3 Nf6 5.e3 (--> 1.b4 e5 2.Bb2 e4 3.e3 Nf6 4.b5 d5 5.d3).

4.d4 Nf6 5.e3 (--> 1.b4 e5 2.Bb2 e4 3.e3 Nf6 4.b5 d5 5.d4).

4.e3 (--> 3.e3 d5 4.b5).

4.e3 Nf6 (--> 1.b4 e5 2.Bb2 e4 3.e3 Nf6 4.b5 d5).

3.b5 f6

4.e3 c6 5.Qh5 (5.d3 Qa5 6.Bc3 Qb5 7.de4 Qa4+=) 5...g6= 6.Qd1 cb5 (better is 6...d5=) 7.c4 (better is 7.Nc3!?=) 7...bc4–/+ 8.Bc4 Bd6?? (better is 8...d5 9.Bb5 Nc6–/+) 9.Qb3+= (9.Qb3 Kf8 10.Nc3+=) 1–0. DEFFM – GuestKBTT, freechess.org, 2016.

4.e3 d5 5.c4 Bf5 6.Nc3=.

4.e3 g6 5.d3+= ed3 6.Bd3 Qe7 (6...a6 7.Nf3+=) 7.Nf3 Bg7 8.0–0 f5 9.Nc3 (9.Bd4 Nf6+=) 9...Bc3 (9...Nf6!?+=) 10.Bc3+– Nf6 11.Bc4 (11.e4 fe4 12.Be4 0–0 13.Bd5 Kh8+–) 11...Rf8 12.Qd3 (12.Rb1 Ne4 13.Bd4 d6+/–) 12...d6 13.Bd4 c5 (13...Be6 14.Be6 Qe6 15.a4+/–) 14.Bb2 Be6 15.Be6 Qe6 16.Ng5 Qe7 17.Rad1 Nbd7 (17...Nfd7 18.Nf3+/–) 18.Qd6 Qd6 (better is 18...Ne4!? 19.Qe7 Ke7 20.Nh7 Rfd8+–) 19.Rd6+– h6 20.Ne6 Rf7 (20...Ke7 21.Rfd1 Rg8+–) 21.Nc7 (21.Nc7 Ke7 22.Re6 (22.Na8?! Kd6 23.Rd1 Ke7+/–) 22...Kd8 23.Na8+–) 1–0. GuestKYNK – GuestCJJP, freechess.org, 2017.

3.b5 Qg5

4.Nc3 d5+= 5.e3 Nf6 6.Nge2 a6 (6...Bd6 7.d3+=) 7.a4 (7.h4 Qh6=) 7...Qe5 (7...Bd6 8.a5+=) 8.Nf4 White is in command 8...Bc5?? (better is 8...Bd6=) 9.Ncd5!+– Qd6 (9...Qd5 10.Nd5) 10.Nf6 gf6 11.d4 (11.ba6 ba6 12.Qh5 c6+–) 11...ed3 (11...Bb6 12.Bc3+–) 12.Qd3 (12.cd3?! Bb4 13.Ke2 Rg8+/–) 12...Qd3 (12...Bb4 13.Ke2 Bg4 14.f3+–) 13.Bd3 Nd7 14.Nd5 Bd6 15.Nf6 Nf6 16.Bf6 Rg8 17.g3 h5 18.h3 (18.ba6 ba6 19.Rb1 c5+–) 18...Be6 (18...ab5 19.ab5 Ra1 20.Ba1+–) 19.Bh7 (better is 19.ba6 ba6 20.Bh7+–) 19...Bd5 (19...Rf8 20.ba6 Ra6+–) 20.e4 (20.Bg8?! Bh1 21.Bh7 Be7+–) 20...Kd7 (20...Be7 21.Be7 Ke7 22.ed5+–) 21.Bg8 (better is 21.ed5 Rge8 22.Kd2 Be5 23.Be5 Re5+–) 21...Be4 22.Bf7 Bh1 23.Bh5 Rf8 (23...Be4 24.c4+–) 24.Bg4 Ke8 25.Bd4 ab5 (25...Bd5 26.Rd1+–) 26.ab5 Be4 (26...Kf7 27.f3 Bg3 28.Kf1+–) 27.Ra8 (27.c4 Kf7+–) 27...Ke7 28.Rf8 Kf8 29.Kd2 Kf7 30.f4 Kg6 (30...c6 31.c4 cb5 32.cb5+–) 31.c4 b6 (31...Bb4 32.Ke3 Bg2 33.Be6+–) 32.Ke3 Bb1 (32...Bg2 33.Be6+–) 33.Bf3 Bf5 (33...Kf7 34.g4+–) 34.g4 Bb1 (34...Be6 35.f5 Bf5 36.gf5 Kf5 37.h4+–) 35.h4 White prepares the advance g5 35...Kh6 (35...Kf7 36.h5+–) 36.g5 Kh7 37.Be4 Be4 38.Ke4 Kg6 39.Be5 Bc5 40.Bc7 Kh5 41.Kd5 Kh4 (41...Kg6 42.Ke6 Kh5 43.f5+–) 42.g6 Bf8 43.Bb6 Kh5 44.f5 White intends c5 44...Kg5 45.Ke6 Bg7 46.c5 Bd4 Plans Kh6 47.Bd8 Kh6 48.c6 (48.c6 Kh5 49.c7+–) 1–0. Roczniak,Jan – Walek, Poland (year?).

4.c4 Nf6=.

4.e3 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 Nf6 (7...d5 8.Bd4=) 8.Nh3 Qf5 (8...Qh4 9.Bf6 Qf6 10.Nc3=) 9.d3 (9.Bf6 Qf6 10.Nc3 Qe5=) 9...ed3 (better is 9...d5!?=) 10.Bd3+/– Qd5 (10...Qg4 11.Qg4 Ng4 12.Ng5+/–) 11.Nf4 Bb4 (11...Qd6 12.0–0+/–) 12.Nd2 Qc5 (12...Qg5 13.Bd4 d6 14.c3+/–) 13.0–0 (better is 13.Bd4 Qd6 14.0–0 Bd2 15.Qd2+–) 13...g5?? (better is 13...Bc3+–) 14.Bf6 gf4 15.Ne4 (15.Bh8 fe3 16.Re1 d5+–) 15...Qf8 16.ef4 (16.Qa1 d6 17.Bg7 Qe7 18.Nf6 Kd8+–) 16...Rg8 (16...Be7 17.Qa1 (worse is 17.Bh8 Qh8 18.Bc4 Qg7+–) 17...d5 18.Bg7 de4 19.Bf8 (19.Bh8 ed3 20.Be5 Bd6+/–) 19...Rf8 20.Be4+–) 17.Bg5 (17.Ng5 d5 18.Qe2 Be7 19.Nh7 Kd8 20.Nf8 Bf6+–) 17...h6 (17...Be7 18.Nf6 Bf6 19.Re1 Be7 20.Be7 Qe7 21.Bh7 Rf8+–) 18.Nf6 Ke7 (18...Kd8 19.Nd7 hg5 20.Nf8 Rf8 21.fg5 Nd7+–) 19.Ng8 Kd6 20.Be7 Qe7 21.Ne7 (better is 21.Bc4 Kc5 22.Ne7 c6 23.Bf7 d5 24.Nc8 h5+–) 21...Ke7 22.Qe2 Kf8 23.Qh5 (23.Qe5!? d5 24.Qc7 Kg7+–) 23...c6 24.Rb1 Be7 25.Re1 (25.Qh6 Ke8 26.Qh8 Bf8 27.Re1 Kd8 28.b6 d5 29.Qf8 Kd7 30.Qe7) 25...cb5 (25...d5 26.Qh6 Ke8 27.Qd6 Be6 28.Re6 fe6 29.Bg6 Kf8 30.Qe6 Kg7 31.Qf7 Kh6 32.Qh7) 26.Qh6 Kg8 27.Re7 Nc6 (27...d5 28.Re8) 28.Bh7 (28.Re8) 28...Kh8 29.Re8 1–0. DEFFM – Guestyps, freechess.org, 2016.

3.Nc3 Bb4

4.Ne4+= Be7? 5.Bg7+– Bf6?? (5...d5+–) 6.Nf6 Nf6 7.Bh8 Ne4 8.e3 Ke7 (8...d5 9.Qh5+–) 9.Bc3 (9.Bd4 Nc6+–) 9...Nc6 (9...Nc3 10.dc3 d5 11.Bd3+–) 10.Qf3 (10.Ne2 Nc3 11.Nc3 d6+–) 10...d5 (10...Nc3 11.dc3 Ne5 12.Qe4+–) 11.Bd3 (11.Ne2 Nc3 12.Nc3 Be6+–) 11...f5 (11...Nc3 12.dc3 Ne5 13.Qh5+–) 12.Be4 (12.Ne2 Be6+–) 12...de4 13.Qh5 Qg8 14.Qh4 Ke8 15.g3 Be6 16.Bf6 Nb4 17.Qh5 Bf7 (17...Qf7 18.Qf7 Kf7 19.Rb1 Nc2 20.Kd1+–) 18.Qd1 Qg6 (18...Ba2 19.f3 Bd5 20.fe4 Be4 21.Qh5 Qf7 22.Qf7 Kf7 23.Nf3 Nc2 24.Ke2 Kf6 25.Ra5=) 19.Be5 c6 (19...Qc6 20.Bc3 Na2 21.Bd4+–) 20.a3 Nd5 21.Rb1 b5 22.Ne2 Qe6 23.Ba1 Bh5 24.0–0 (24.d3 Bf3 25.Rg1 Qd6+–) 24...Kf7 25.Re1 Rg8 26.c4 Nc7 27.Qc2 (27.d3 Ke8+–) 27...a5 (27...Be2 28.Re2 Qd6 29.Rb3+–) 28.Nd4 Qd6 (28...Qc4 29.Qc4 bc4 30.Rb7+–) 29.Nf5 (better is 29.cb5 cb5 30.Nf5 Qb6+–) 29...Qd3 (29...Qe6 30.Qe4 Qe4 31.Nd6 Ke7 32.Ne4+–) 30.Qd3 ed3 31.Nh6 (31.Nh6 Kf8 32.Ng8 Kg8 33.Be5+–) 1–0. Dopper,Johan – Van Eldik,Chr, 1991.

4.Ne4 f6 5.a3 Ba5 (5...Be7 6.e3=) 6.c4 (6.e3 d5+=) 6...Ne7 7.Nf3 f5 (7...d5 8.cd5 Nd5 9.e3=) 8.Bg7 (better is 8.Ng3 Rg8 9.e3+/–) 8...Rg8?? (better is 8...fe4 9.Bh8 Ng6=) 9.Nf6+– Kf7 10.Ng8 Kg8 (10...Kg7 11.Ne7 Qe7 12.g3+–) 11.Bf6 d5 (11...d6 12.Qb3+–) 12.cd5 (12.Qa4 Bb6+–) 12...Qd5 (12...Nd7 13.Be7 Qe7+–) 13.Be7 1–0. Wall,Bill – Seedandr, internet, 1999.

3.Nc3 Nf6

4.a3 Nc6 5.d3 e3 6.fe3 d5 7.Nf3 Bg4 8.g3 Bf3 (8...Qe7!?=) 9.ef3+/– Ng4?? (better is 9...Qe7+/–) 10.fg4+– 1–0. b4_player – johannes, internet, 2013.

4.a3 d5 5.d4 Bd6 6.Nb5 Be7 7.e3 a5 8.ba5 c6 9.Nc3 0–0. Zeike – Woelfelschneider,Peter, 3.OU/TSC, 2000.

4.a3 d5 5.e3 a5+=.

4.a3 d5 5.e3 Be7 6.Nge2 0–0 7.Nf4 c6 8.b5 Nbd7 9.Be2 Qc7 10.d3 Nc5 11.0–0 g5 (11...Bd6 12.bc6 bc6 13.de4 de4 14.Qd4+=) 12.Nh5= Nh5 13.Bh5 f5 14.de4 fe4 15.bc6 bc6 16.Qd4 Ne6 17.Nb5 Nd4 (17...cb5 18.Qh8) 18.Nc7 Nf5? (18...Nc2 19.Na8 Na1 20.Ra1 Bd6+=) 19.Na8+– Ba6 20.Nc7 Bf1 21.Rf1 (21.Kf1?! Ne3 22.Kg1 Rb8 23.fe3 Rb2+/–) 21...Bc5 (21...Rb8 22.Be5 Bd6 23.Bd6 Nd6+–) 22.Rb1 Rb8 (22...Rc8 23.Ne8 Rb8 24.Nf6 Kg7 25.Nd7 Rb2 26.Rb2 Ba3 27.Rb7+–) 23.Na6 Rb2 24.Rb2 Ba3 25.Rb7 Nd6 (25...Ne7 26.Ra7 Bd6 27.Nc7 Bc7 28.Rc7+–) 26.Ra7 Bc1 (26...Nc4 27.Nc7 Bd6 28.Ne6+–) 27.Nc7 Nc4 (27...Nb5 28.Nb5 cb5 29.Bf7 Kf8 30.Bd5 Bb2+–) 28.Ne6 h6 29.Bg6 1–0. Janek – Stephen, internet, 2016.

4.a3 Bd6 5.d3 ed3 6.Qd3 0–0 7.Nf3 Nc6 8.Nb5 Be7 9.Ng5 d6?? (better is 9...Re8=) 10.Bf6+– Bf6 (10...g6 11.Be7 Qe7+–) 11.Qh7 1–0. pierred – mark gascoigne, ChessWorld.net, 2005.

3.c4 e3

4.fe3 Qh4 5.g3 Qc4 6.a3 a5 7.ba5 Nc6 (7...d5 8.Bg2+=) 8.Bg2= Na5 (8...d5 9.Nf3=) 9.Nc3 Nf6 10.Rc1 Qa6 (10...Qb3 11.Qb3 Nb3 12.Nb5+–) 11.Qc2 (11.Ne4 Ne4 12.Be4 Nc4+=) 11...Nc4+= The pressure on the isolated pawn grows 12.Nd5 Nd5 13.Qc4 Qc4 14.Rc4 Ne7 (14...c6 15.Bd5 cd5 16.Rc7+=) 15.Nf3 (15.Rc7 d5+–) 15...f6 (15...Nd5 16.Nd4 c6 17.Bd5 cd5 18.Rc7+/–) 16.0–0 (better is 16.Rc7 Nd5 17.Rc4+/–) 16...c6 17.Rc3 (17.e4 b5 18.Rc3 d6+=) 17...Nd5 18.Rb3 b5 19.Nd4 Nc7 20.Nc6 dc6 21.Bc6 The passed pawn on d2 will quickly become a dangerous weapon 21...Bd7 22.Ba8 Na8 23.Rc1 Nb6 24.Bd4 (better is 24.Rc7!?=) 24...Nc4–/+ 25.d3 Nd2 (25...Na3 26.Rc7 Bd6=) 26.Rbc3= Rg8? (26...b4 27.ab4 Bg4+/–) 27.Rd1+/– b4 28.ab4 Bb4 29.Rd2 Bc3 30.Bc3 Kf7 31.Kf2 Rc8 32.Bd4 Rc1 33.h4 Bh3 (33...f5 34.Ra2 Rc7 35.h5+–) 34.e4+– Rf1 35.Ke3 Rg1 36.Kf3 Rf1 37.Bf2 Bg4 (better is 37...Be6!?+–) 38.Kg4 Rf2 39.d4 Ke6 40.Ra2 (40.Ra2 g6 41.Ra6 Kf7 42.Ra7 Kg8 43.e3+–) 1–0. Woschkat,Karl_Heinz – Vitkevicius,Juozas, CiF, 1994.

4.fe3 Qh4 5.g3 Qc4 6.a3 Nf6 7.Nc3 (7.Bg2 Ng8=) 7...h5 (7...d6 8.d3 Qc6 9.Nf3=) 8.Nf3 (8.Rc1 c6+=) 8...h4 (8...c6!?=) 9.gh4+= Nc6 (9...d6 10.d3 Qe6 11.Qc1+=) 10.Bh3 (better is 10.d3!? Qa6 11.Rg1+/-) 10...Ne5+= 11.Nd4 (11.e4 Nf3 12.ef3=) 11...Rh4? (11...c6 12.Rc1 Kd8 13.d3+/-) 12.d3 (better is 12.Ncb5 a6 13.d3 Bb4 14.ab4 Qb4 15.Qd2 Qd2 16.Kd2+=) 12...Qa6= 13.Bg2 Nfg4 (better is 13...d6= is the best option Black has) 14.Nd5+– Kd8 15.Qc2 (15.h3 Nh6 16.Qc2 c5 17.bc5 Qg6+–) 15...Nc6 (better is 15...c5 16.Nb3 Qh6 17.Be5 Ne5 18.Nc5 Nc6+–) 16.h3+– Nh6 (16...Ne3 17.Nc6 dc6 18.Ne3+–) 17.Rc1 (better is 17.b5 finishes off the opponent 17...Qa5 18.Bc3 Nd4 19.ed4 (19.Ba5?? White will choke on his greed 19...Nc2 20.Kd2 b6–+) 19...Qb5 20.Nc7 Kc7 21.Ba5 Kd6 22.Bb4 Ke6 23.d5 (23.Bf8?! is clearly inferior 23...f6+–) 23...Kf6 24.Bf8 Qa5 25.Bb4+–) 17...Bd6+/- 18.Nf3 (better is 18.Qc3 Nd4 19.Nc7 (worse is 19.ed4 Bg3 20.Kd1 c6=) 19...Bg3 20.Kd2 Nb3 21.Qb3 Bc7 22.Bg7+–) 18...Bg3? (18...Rh5 19.Qc3 Bf8+– (19...Rd5?? capturing the knight is not a good idea 20.Qg7 Nd4 21.Nd4+–)) 19.Kd1 Rh5 20.e4 Rd5 (better is 20...f6 21.Bf1 Rd5 22.ed5 Nf5+–) 21.ed5 Nf5 (21...Ne7 22.Ne5 Nhf5+–) 22.Qc5 White has a mate threat (22.Qd2 Qb6 23.Kc2+– (23.dc6 is not possible 23...Ne3 24.Qe3 Qe3+=)) 22...d6= 23.Qg1 (better is 23.Qc3 Ne3 24.Kd2=) 23...Bf4 (23...Qa4!? must definitely be considered 24.Rc2 Bf4 25.dc6 Ne3 26.Qe3 Be3+=) 24.dc6= Ne3?? (24...Qa4 25.Ke1 Qb3 26.Bg7 Bc1 27.Bf6 Ke8 28.cb7 Bb7 29.Nd2+=) 25.Ke1?? a transit from better to worse (better is 25.Kd2 White has the better game 25...bc6 26.Nd4 Ng2 27.Kc2 Ne3 28.Kb1+–) 25...Bg3= 26.Kd2 Bf4 27.Ke1 (better is 27.Nd4 and the result of the game is clear: White will win 27...Ng2 28.Kc3 Bc1 29.Bc1+–) 27...Bg3= 28.Kd2 Twofold repetition 28...Bf4 29.Ke1 (better is 29.Qe3 secures the point 29...Be3 30.Ke3+–) 29…Bg3= ½–½. Havlicek,Libor Sr – Bakalar,Jan (2045), SVK–chT3A, 2001.

3.c4 f6

4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 d5 8.cd5 Qd5 9.e3 (9.Nc3 Qc5+=) 9...Nh6 (better is 9...Bf5!?=) 10.Nc3+/– Qe6 11.Qa4 Bd7?? (11...Nd7 12.Qe4 Nc5 13.Qe6 Be6 14.d4+/–) 12.Ne4 (better is 12.Qa8 Kd8 13.Qb8 Bc8 14.Qa7+–) 12...Bd6 (12...Na6 13.Bc4 Qg4 14.Ng3+/–) 13.Nd6 (13.Bc4 Qe7+–) 13...Qd6 (13...cd6!? 14.Ne2 Qf5+–) 14.Qe4+– Be6 15.Bc4 0–0?? (better is 15...Kd7+–) 16.Qe6 Qe6 17.Be6 Kh8 18.Nf3 c6 (18...Re8 19.Bb3+–) 19.b6 (19.bc6 Nc6 20.d4 Re8+–) 19...Na6 (19...Re8 20.Bh3+–) 20.0–0 (20.Ke2 Nc5 21.Bc4 Nf5+–) 20...Nc5 21.Bc4 Ne4 (21...Nf5 22.Bc3 Nd6 23.Be2+–) 22.d3 Ng5 (22...Nd6 23.Bb3+–) 23.Ng5 fg5 24.f4 gf4 25.Rf4 Rf4 26.ef4 Nf5 27.Kf2 h6 28.g4 Nd6 (28...Ne7 29.Ba6! Nd5 30.Bb7 Nb6 31.Bc6+–) 29.Ke3 (29.Be6 Ne8+–) 29...Nc8 (29...Nc4 30.dc4 Kh7 31.Bg7 Kg7 32.Ke4+–) 30.Bd4 Kh7 (30...Ne7 31.Bc5 Nd5 32.Bd5 cd5 33.Bd4+–) 31.f5 (31.Bc5!? Nb6 32.Bb6 Kg6+–) 31...Nd6 (31...Ne7 32.Be6+–) 32.h4 (32.Be6 Ne8 33.Bd7 Nd6+–) 32...g6 (32...Nc4 33.dc4 g5 34.hg5 hg5 35.Bf6+–) 33.fg6 (better is 33.Be6!? gf5 34.gf5 Ne8+–) 33...Kg6 34.Be6 Ne8 (34...Nb5 35.Be5+–) 35.Kf4 White prepares the advance g5 35...Nf6 (35...Kh7 36.Ke5 Kg7+–) 36.h5 Kg7 37.Kf5 c5 (37...Kf8 38.Kf6 c5 39.g5 cd4 40.gh6 Ke8 41.h7 Kf8 42.h8Q) 38.Bf6 Kf8 39.g5 hg5 40.h6 g4 41.h7 g3 42.h8Q 1–0. GuestPXSS – GuestHYTB, freechess.org, 2017.

4.b5 d5 5.e3 Nh6 6.Qc2 Be6 7.cd5 Bd5 (7...Qd5 8.Nc3 Qd6 9.Qe4+/–) 8.Nc3 c6 9.Ne4 f5 10.Nc3 a6 11.a4 Qc7?? (better is 11...ab5 12.Nd5 Qd5 13.ab5 Ra1 14.Ba1 Qd7+/–) 12.Nd5+– (12...Qd8 13.Nf4+–) 1–0. fostir5000 (2085) – VASSILIOS, ChessWorld.net, 2003.

4.Nc3 Bb4 5.Ne4 d5 6.cd5 Qd5 7.Nc3=.

4.Nc3 f5 5.Nh3 Qf6 (5...Nf6 6.Nd5 Nd5 7.cd5=) 6.b5 (6.Nd5 Qb2 7.Nc7 Kd8 8.Na8 Bb4+=) 6...b6 7.Qc2 Bb7 8.f3 ef3 9.Nd5 Qd6 10.Qf5 fe2? (10...Bd5 11.cd5 fe2 12.Be2 Ne7 13.Qh5 Ng6+/–) 11.Be5+– (11.Be2?! Bd5 12.cd5 Ne7 13.Qh5 Ng6+/–) 11...Ne7 (11...ef1Q 12.Rf1 Nh6 13.Qh5 (13.Bd6?! Nf5 14.Nc7 Kd8+=) 13...Qg6 14.Nc7 Kd8 15.Qg6 hg6 16.Na8 Ba8 17.Bb8 Bg2 18.Nf4 (18.Ba7?! Bc5 19.Nf4 Re8 20.Ne2 Bf1 21.Kf1 Rf8 22.Ke1 Bf2 23.Kd1 Kc7=) 18...Bf1 19.Kf1+/– (worse is 19.Ba7 Bc4 20.Ng6 Rg8 21.Bb6 Ke8–/+)) 12.Nc7 (12.Qh5 Qg6 13.Nc7 Kd8 14.Qe2 d6 15.Na8 Ba8+–) 12...Kd8 13.Qf8!! (13.Bd6 Nf5 14.Bf4 ef1N 15.Na8 Ba8 16.Kf1 Bd6–/+) 13...Rf8 14.Bd6 ef1Q 15.Rf1 Rf1 16.Kf1 (16.Kf1 Nc8 17.Bf4+– (17.Na8?! Nd6 18.Nb6 ab6+/–)) 1–0. pcmvr (2830) – onamb (1800), net–chess.com, 2014.

3.d3 Nf6

4.a3 d5 (--> 3.a3 d5 4.d3 Nf6).

4.de4 Ne4 5.e3 (better is 5.a3!?=) 5...Bb4 6.c3 Be7 7.Nf3 Bf6 8.Bd3 d5 9.0–0 0–0 10.Qc2 Qe7 11.Nd4 Bd4 (11...c5!?-/+) 12.cd4+= f5 13.Nd2 (13.Be4 Qe4 14.Qc7 Nc6+=) 13...g6 (13...Nc6 14.Rac1-/+) 14.Nf3 Nc6 15.Rac1 Rf7 16.Ne5 Ne5 17.de5 c6 18.Be4 (better is 18.a4!?=) 18...fe4-/+ (18...de4?! 19.e6 Be6 20.Qc3=) 19.Qc3 Be6 20.a4 Raf8 (better is 20...Rc8!?–+) 21.Ba3+= Qg5 22.Bf8 Kf8?? (better is 22...Bh3! 23.g3 Bf1–+ (worse is 23...Rf8 24.f4 ef3 25.Rf2+=; 23...Kf8?! 24.e6 Rg7 25.f4=)) 23.Qc5 Kg7 24.g3 (24.Kh1!?+=) 24...Bh3 (better is 24...Qe5 25.Qa7 Bh3-/+) 25.Rfe1? (better is 25.e6 Be6 26.Qa7+=) 25...Qg4–+ (25...Qe5?! 26.Qa7 Qf5 27.f4 ef3 28.Kf2-/+) 26.f4 (26.Qa7?? Qf3 27.Rc6 Qg2) 26...ef3 27.Rc2 Qf5 (27...Qa4!? 28.Rf2 a6–+) 28.Rf2-/+ Qe5 29.Qa7 h5 (29...Qc3 30.Qd4 Qd4 31.ed4+=) 30.Qd4 Qd4 31.ed4 Bg2 32.h4 Bh3 33.Kh2 Bg4 34.Re5 b6 35.Kg1 Ra7 36.Ra2 b5 (36...Ra5!?-/+) 37.a5= Bf5 38.Re3 Be4 39.Kf2 (better is 39.a6!?+=) 39...Kf6 40.Rc3 Ra6 41.Rc5 Ke6 42.Ra3 1–0. Fournier,Frederic – jejesususo (2100), Active (5/0), 2004.

3.e3 a6

4.a3 Nc6 5.d4 ed3 (5...d5 6.c4=) 6.Bd3+= Qg5 (6...d5 7.Nf3+=) 7.Nf3+/– Qd8 8.c4 Nh6 9.0–0 d5 10.Qc2 dc4 11.Bc4 Bf5 12.e4 Be6 13.Be6 fe6 14.Rd1 Qe7 15.Nc3 Rd8 16.Nd5! ed5 17.ed5 Na7? (17...Nb4 18.ab4 Qb4 19.Re1 Kd7+–) 18.Re1 Ng8 (18...Rd7+–) 19.Qc7 Nb5 20.Qb7 Nd6 21.Qc6 Rd7 22.Re7 Ke7 (22...Ne7 23.Qa6 Nec8+–) 23.Re1 Kd8 24.Ng5 Rb7 25.Be5 h5 (25...a5 26.Bd6 Re7 27.Re7 Ne7 28.Ne6) 26.Bd6 Re7 27.Re7 h4 (27...Ne7 28.Ne6) 28.Ne6 1–0. pierre – comp, internet, 2014.

4.a3 d5 5.c4 Nf6 6.cd5= Nd5 7.Nc3 b5 8.Ne4+/– Qh4 9.Ng3 Bd6 10.Nf3 Qh6+/– 11.Nf5?? Bf5–+ 12.Qe2 0–0 13.Rc1 Re8 14.Qd1 Nd7 15.Be2 c5 16.bc5 Nc5 17.d4 Na4 18.Ba1 Ba3 19.e4 Bc1 20.ef5 Nac3 0–1. coloplayah (1960) – chily (2010), net–chess.com, 2005.

4.c4 f6 5.a3 d5 (5...f5 6.d3 Nf6 7.de4 Ne4 8.Be2+=) 6.cd5 Qd5 7.Nc3 Qf5 8.Be2 (8.Qc2 Be6+/–) 8...Be6 (8...Bd6 9.d3 ed3 10.Bd3+=) 9.Nh3 (better is 9.Qc2+/–) 9...Qg6?? (better is 9...Bd6+=) 10.Bh5+– Bh3 11.Bg6 hg6 12.gh3 Rh3 (12...f5+–) 13.Qg4 Rh6 (13...Nd7 14.Nd5 0–0–0 15.Qh3+–) 14.Qc8 Kf7 15.Ne4 (15.Qb7 Ne7 16.Qa8 Nec6 17.Ne4 Rh4+–) 15...Ne7 16.Qb7 Nec6 17.Rc1 (17.Rc1 Ra7 18.Qc8+– (18.Rc6?! Rb7 19.Rc2 Rh5+–)) 1–0. GuestDGHQ – GuestZXFS, freechess.org, 2017.

3.e3 c6

4.a4 Nf6 5.b5 d5 6.c4 (--> 1.b4 e5 2.Bb2 e4 3.e3 Nf6 4.b5 d5 5.c4 c6 6.a4).

4.d3 ed3 5.Bd3 (5.c3 d5=) 5...Bb4+= 6.Nd2 Nf6 7.Ngf3 d5 8.0–0 Bg4 (8...Nbd7 9.a3 Bd6 10.e4 de4 11.Ne4 Ne4 12.Be4+=) 9.c3 (9.Qb1 Qe7=) 9...Bd6 (9...Be7 10.h3 Bh5 11.c4+=) 10.Qc2 (10.c4 dc4 11.Bc4 Nbd7+=) 10...Nbd7 11.Rfe1 (11.c4 0–0+=) 11...0–0 (11...Nc5 12.e4 de4 13.Ne4 Nce4 14.Be4-/+) 12.e4 (12.c4 Rc8+=) 12...Re8 (12...de4 13.Be4 Nc5 14.Nd4-/+) 13.ed5 Re1 14.Re1 cd5 15.Nd4 (15.h3 Bf3 16.Nf3 Qc7-/+) 15...Nc5 16.Bf5 (16.h3 Bd7-/+) 16...Bf5 17.Qf5 (17.Nf5 b5-/+) 17...g6 18.Qh3 Qa5 19.a3 Nfe4 20.Ne4 (20.Qe3 Re8 21.Qh3 Be5 22.Ne4 de4–+) 20...de4–+ 21.Ba1 (21.Qe3 Nd3 22.Re2 f5–+) 21...Re8 22.f3 (22.Qh4–+) 22...e3 23.Qh6 Qa3 –+. Merten,Rainer – Gross,Wilhelm, xv/16, 1987.

3.e3 f6

4.a3 d5 (--> 1.b4 e5 2.Bb2 f6 3.a3 d5 4.e3 e4).

4.b5 c6 5.c4 f5 6.d3 c5? 7.de4+– d6 8.ef5 Bf5 9.Qf3 Nd7?? 10.Qf5 Ne7 11.Qh5 Ng6 12.Bd3 Nf6 13.Bg6 Kd7 14.Bf5 Kc7 15.Qf7 Nd7 16.Nc3 Kc8 17.0–0–0 b6 18.Qd5 g6 19.Qa8 Kc7 20.Nd5# 1–0. ochohombre@ – Master1, mySchach.de, 2004.

4.Bc4 d5 5.Qh5+/– g6 6.Qd5 Qd5 7.Bd5 f5?? 8.Bh8+– Ne7 9.Nc3 Nd5 10.Nd5 Bd6 11.f4 Be6 12.Nf6 Kf7 13.Nh7 Nc6 14.Bc3 Be7 15.Ng5 Bg5 16.fg5 Ke7 17.b5 Nd8 18.Ne2 Nf7 19.Bf6 Kd6 20.Nf4 Rg8 21.Kf2 Bc4 22.a4 Kd7 23.d3 ed3 24.cd3 Be6 25.Ne6 Ke6 26.Rac1 Rc8 27.Rc3 Nd6 28.h4 b6 29.h5 Ne8 30.Rc6 Kf7 31.h6 Nf6+– 32.Rf6 Ke7 33.h7 Rh8 34.Rg6 Kf7 35.Rhh6 Kf8 36.Rg8 Rg8 37.hg8Q Kg8 38.Rf6 Kg7 39.Rf5 Kg6 40.e4 Kg7 41.Rf6 Kg8 42.g6 Kg7+– 43.e5 Kg8 44.g4 Kg7 45.g5 Kg8 46.e6 Kg7 47.e7 Kg8 48.Rf7 Kh8 49.e8Q# 1–0. pumpkin (2275) – nightpass, net–chess.com, 2007.

4.Qh5 g6 5.Qd5 Bb4 6.Qe4 Qe7 7.Qe7 Be7 8.Nc3 +=.

4.Qh5 g6 5.Qd5 Qe7 6.Nc3 c6 7.Qe4+/– Qe4 8.Ne4 Bg7? 9.Nd6+– Kf8 10.Nc8 d5 11.Nd6 b5 12.a4 a6 13.ab5 cb5 14.Nb5! f5 15.Bg7 Kg7 16.Nc7 Ra7 17.Nd5 Ne7 18.Ne7 Re7 19.Nf3 h6 20.c3 Rd8 21.d4 f4 22.Kd2 fe3 23.fe3 Rde8 24.Ne5 Kf6 25.Ng4 Kg5 26.Ra5 Kh4 27.Nf6 Rf8 28.g3# 1–0. orane (2020) – mass, Live Game Caissa's Web, 2004.

3.e3 Qg5

4.a3 d6 5.d3 ed3 6.cd3 a6 7.Nf3 Qg4 8.Nbd2 Be7 9.h3 Qg6 10.Ne4 Nf6 11.Nh4 Qh6 12.Nf5 (12.Nf5 Bf5 13.Qf3 Be4 14.de4–+). GuestVPPL – guestf***er, freechess.org, 2017.

4.Nh3 Qg6 5.Nf4+= Qf5 6.Qh5 Qh5 (6...d6!?+=) 7.Nh5+/– f6 8.Nc3 Bb4 9.Nd5 Bd6 10.Ng7 Kf7 11.Nf5 (11.Nh5 Ke6 12.Bc4 Kf5+–) 11...Ke6 12.Nd6 Kd6 13.Nc3 Ne7? (better is 13...Ke7+–) 14.Ne4 Ke6 (14...Kc6 15.Nf6 Na6 16.Rb1+–) 15.Nf6 (15.Bf6?! Rg8+–) 15...Rf8 16.Nh7 Rf7 (16...Rg8+–) 1–0. orane (2000) – destoyer1, Live Game Caissa's Web, 2004.

4.Nh3 Qh4 5.a3=.

3.f3 Bb4??

4.c3 Qf6 5.Qc2=+ Bc5 6.e3 ef3 7.Bd3?? f2 8.Ke2 f1Q# 0–1. soraya – davebrown (1700), net–chess.com, 2007.

4.Bg7 Bd6 5.e3 +–.

4.Bg7 Bd6 5.Bh8?? Qh4 6.g3 Bg3 7.hg3 Qg3.

3.f3 Nf6

4.a3 d5 5.Nc3 c5 6.bc5 Bc5 7.e3 Nc6 8.Bb5 0–0 9.Nge2 ef3 10.gf3 Nh5 11.d4 Bb6 12.h4 a6 13.Bc6 bc6 14.Qd3 Qf6 15.f4 (better is 15.e4!?+=) 15...Bf5–+ 16.e4 de4 17.Ne4? (better is 17.Qe3–+) 17...Be4 18.Qe4 Rfe8 19.Qd3 (19.Qf3 Nf4 20.Rf1 Ne2 21.Qf6 Nd4 22.Kd2 gf6 23.Bd4 Bd4 24.c3 Be3 25.Kc2–+) 19...Nf4 20.Qf3 Re2 21.Kd1 Rae8 22.Rf1 Ba5 23.Bc3 Qd4! 24.Kc1 (24.Bd4 Re1) 24...Bc3 0–1. Sen,Burak – Yilmaz,A (1825), Kemer TUR, Men Ch, 2012.

4.fe4 Ne4 5.Nf3 b5 6.e3= a6 7.c4 c6 8.a4 bc4=+ 9.Bc4 d5 10.Bb3 Nd7 11.d3? Bb4–+ 12.Nbd2? Nc3?? 13.Qc2+/– d4 14.Nd4+– Nd5 15.Qc6 Ne3? 16.Qa8 0–0 17.N4f3 Ng2? 18.Kf2+– Nf4 19.Rhb1 Nd3=+ 20.Kf1 N7c5?? 21.Ba3?? Bh3–+ 22.Kg1 Qa8 23.Bb4 Nb4 24.Bc4 Nc2 25.Ra2 Nd4! 26.Bf1 Nf3 (26...Nf3 27.Nf3 Qf3 28.Bh3 Qh3–+) 0–1. thotares (1630) – guinguin, internet, 2007.

4.fe4 Ne4 5.Nf3 d5 6.e3 Bg4 (6...Bb4 7.Bg7 Rg8 8.Bb2+=) 7.g3 (7.a3 a5=) 7...f6 (7...Qd6 8.a3–/+) 8.a3+= Nc6 (8...a5 9.b5+=) 9.d3 (9.Bg2 Qd6=) 9...Ng5 (9...Nd6 10.Bg2+=) 10.Nbd2 (10.Be2!? Nf7 11.0–0=) 10...Qe7 11.Qe2 (11.Kf2 a5+=) 11...Nb4!–/+ 12.0–0–0 (12.ab4 Nf3) 12...Nc6 13.h3 Nf3 14.Nf3 Bh5 (14...Be6 15.Bg2–/+) 15.g4 Bf7 16.Bg2 (16.Rg1 0–0–0–/+). jaddwarrior – chump112, ChessWorld.net, 2013.

3.a3 a5

4.ba5 Ra5 5.d3 (better is 5.Nc3=) 5...Rd5 (better is 5...Nf6!?+=) 6.Nc3+/– Rd6 7.Ne4 (7.de4?? Rd1 8.Rd1 Qf6–+) 7...Re6 (7...Rb6 8.Bd4 Ra6 9.Nc5+=) 8.c4 b6 9.Qc2 (better is 9.Nh3+/–) 9...d5? (better is 9...Bb7!?+/–) 10.cd5+– Qd5 11.Qc7 Rc6 12.Qb8 Qa5 13.Kd1 (13.Nd2 Bd6 14.Qd6 Rd6 15.Bg7 Nf6 16.Bh8 Ne4+–) 13...Qa4 14.Ke1 Qc2 (14...Qa5 15.Nd2 Bd6 16.Qd6 Rd6 17.Bg7+–) 15.Rc1 Qa4 (15...Qc1 16.Bc1 Rc1 17.Kd2+–) 16.Qe5 Ne7 (16...Be6 17.Rc6 Qc6 18.Nf3+–) 17.Rc6 Qc6 18.Nd6 Kd7 19.Nf7 Rg8 20.Nf3 g6 (20...Ng6+–) 21.Qb8 Bg7 22.N7e5 Be5 23.Ne5 Kd8 24.Nc6 Nc6 25.Qb6 Kd7 26.e4 Re8 27.f3 (27.g3 Rd8+–) 27...Re6 28.d4 Nd8 29.Bb5 Ke7 30.Qc7 Kf8 31.Qd8 1–0. Nemec,Zdenek – Pavicek,Vlastimil, MCR EP II–1, 2000.

4.ba5 d5 5.d3+=.

4.ba5 Nf6 5.d3 Nc6 6.e3 Ra5 7.de4 Ne4 8.Nd2 Nf6 9.Ngf3 Be7 10.Nb3 Ra7 11.Bd3 0–0 12.0–0 d6 13.c4 Bg4 14.Qc2 Bf3 15.gf3 Ne5 16.Be2 Qc8 17.Kh1 Kh8 18.f4 Neg4 19.Bf3 Nh6 20.Nd4 c6 (20...Qh3!? 21.Bg2 Qh5+=) 21.Rg1+/– Rg8 22.Rg2 Ne8 23.Be4 Nf6 24.Bd3 Ra5 25.Nf3 Rh5 26.Ng5 g6 27.Bc3 Rf8?? (27...Kg7+–) 28.Nh7! (28.Nh7 Qd8 29.Nf8 Qf8 30.Rb1+–) 1–0. aspasio – zvujovic (2730), net–chess.com, 2015.

4.Nc3 d5 5.d4 (better is 5.b5!?=+) 5...ab4–/+ 6.ab4 Ra1 (6...Bb4?? 7.Ra8 Nd7 8.e3+–) 7.Qa1 Bb4 8.Qa8 (8.Ba3 Ba5–/+) 8...Nd7 9.Qa4 Qe7 10.e3 Ngf6 11.Qa8 0–0 12.Nge2 Nb6 13.Qa2 Bd7 14.Ng3 (14.Nf4–+) 14...Ra8 15.Qb1 Na4 16.Qa1 (16.Nge2 Nb2 17.Qb2–+) 16...Qf8 17.Nge2 (17.Kd1 Nc3 18.Bc3 Ra1 19.Ba1 Ng4–+) 17...Nc3 18.Qc1 (18.Nc3 Ra1 19.Ba1 Qa8–+) 18...Na2 (19.c3 Nc1 20.Bc1 Ra1–+) 0–1. black_dog – mrkt, ChessWorld.net, 2003.

4.c4 ab4 5.ab4 Ra1 6.Ba1 d5 (6...Bb4?? 7.Bg7 e3 8.Nf3 ed2 9.Nfd2+–) 7.cd5 Qd5 8.e3 (8.Qc2 A) 8...Bb4?? 9.Bg7 (9.Qc7?! Ne7 10.Bg7 Nbc6 11.Bh8 Qa2=) 9...e3 10.fe3+–; B) 8...Nc6+=) 8...Nc6 (8...Qd6 9.d3+=) 9.Nc3 Qe6 10.Nh3 Nb4 (10...Qg4 11.b5 Nb4 12.Nf4=) 11.Ng5= Qg6 12.Nge4 (12.Nce4? h6 13.Qa4 Kd8 14.Nf7 Qf7–+) ½–½. Benassi,Aspasio – Djuric,Mirko (2195), IECC, 2003.

4.d3 e3 5.fe3 (5.ba5 ef2 6.Kf2 d5+=) 5...ab4 6.Nf3 d5 7.g3 Nc6 8.Bg2 Nh6 9.0–0 Qe7 10.Qd2 Ng4 (worse is 10...ba3 11.Ba3 Qe6 12.Bf8 Ra1 13.Bg7 Rb1 14.Rb1+/–) 11.Bc1 h5 (11...Qf6 12.c3+=) 12.Nd4 h4 (12...Qe5 13.c3 h4 14.Nc6 bc6 15.Rf3–/+) 13.Nc6 (13.Bd5 Nce5 14.Bb2 hg3 15.hg3–+) 13...bc6–/+ 14.Bb2 (14.c3!? hg3 15.hg3 ba3 16.e4–+) 14...Nh2! 15.Bf6?? (15.Kh2 hg3 Passed pawn) 15...gf6 16.Kh2 Qe5 17.Rf4 (17.Kg1 h3 18.d4 Qg3–+) 17...hg3 18.Kg3 (18.Kg1 Qa1 19.Rb4 Bb4 20.Qb4 Ra6–+) 18...Qg5 19.Kf3 (19.Kf2 Rh2 20.Ke1 Rg2 21.Kd1 Rg1 22.Qe1 Re1 23.Ke1–+) 19...Rh2 0–1. Ramos,Francis – Simmelink,Joop (2240), FICGS, 2016.

4.e3 ab4 5.ab4 Ra1 6.Ba1 Nf6 (6...Bb4?? 7.Bg7 Nf6 8.Bh8+–; 6...d5 7.Qh5 Be6 8.Ne2 Nf6+=) 7.Bc3 (7.Bf6 Qf6 8.Nc3 Bb4 9.Ne4 Qe7+=) 7...d5+= 8.Be2 (8.d3 Bd6+=; 8.Ne2 Bd6+=) 8...Bd6 9.d3 0–0 10.Na3 (10.Nd2 Qe7+=) 10...Nc6 (better is 10...Qe7–/+) 11.de4?? (better is 11.b5–/+) 11...Ne4–+ (11...Nb4?! 12.e5 Na2 13.ed6 Nc3 14.Qa1–/+; 11...de4?! 12.b5–/+; 11...Bb4?! 12.Bb4 Nb4 13.ed5 Nbd5 14.c4+=) 12.Qd3 (12.Nb5 Nc3 13.Nc3 Bb4–+) 12...Nc3 13.Qc3 (13.b5–+) 13...Bb4 (13...Bb4 14.Qb4 Nb4–+; 13...Nb4?! 14.Nf3–+) 0–1. tata (2000) – kode (2345), net–chess.com, 2008.

4.e3 d5 5.b5 (5.ba5 Nf6 6.d3 Ra5 7.de4 Ne4 8.Nf3 Nd7=) 5...Nf6 6.d3 Nbd7 7.c4 dc4 8.de4 Ne4=.

4.b5 d5

5.a4 Nf6=+ 6.g3 (6.e3 Nbd7=+) 6...Bc5 7.Bg2 Nbd7 8.e3 Qe7 9.Ne2 Ne5 10.Nf4 (10.0–0!?–/+) 10...Bg4 11.Qc1 g5 12.d4 Bb4 13.c3 Nf3 (13...gf4? 14.de5 Nd7 15.cb4 Ne5 16.Be5 Qe5 17.Qc3 Qc3 18.Nc3+–) 14.Kf1 gf4 15.cb4 fe3 16.fe3 ab4 17.Nd2 (better is 17.Qc5!?–+) 17...Qe6 18.Bf3 (18.h3 Qf5 19.Nf3 ef3 20.hg4 fg2 21.Kg2 Ng4–+) 18...Bf3 19.Nf3 ef3 20.Kf2 Ng4 21.Kf3 Qe4 22.Ke2 Qg2 23.Kd3 Nf2 24.Kc2 Nh1 (24...Qh1?! 25.Qh1 Nh1 26.Rh1 Ra4 27.Kb3–+) 25.Kb3 Qe2 26.Qc7 0–0 27.Qc2 Qe3 28.Kb4 (28.Ka2 Nf2 29.Qb3–+) 28...Rfc8 29.Bc3 Nf2 30.Ra3 Rc4 31.Kb3 Nd1! 32.Qd1 (32.Qb2 Rc3 33.Ka2 Nb2 34.h3 Ra3 35.Kb1 Nd3 36.a5 Qc1) 32...Rc3 33.Kb2 Ra3 0–1. RVJ1943 – mrkt, ChessWorld.net, 2002.

5.d3 Qd7 6.Nc3 Nf6 7.g3 c5 8.e3 Qe7=.

5.d3 e3 6.fe3 Nf6 7.Nf3 Bc5 8.Bd4 Qe7 9.Nbd2 Ng4 10.e4 Bd4 11.Nd4 de4 12.de4 c5 13.N4f3 0–0 14.Qc1 f5 15.h3 Ne3 16.Qb2 f4 17.Qc3 Be6 18.g4 (18.Rc1!?+=) 18...Nd7 19.Kf2 Nb6 20.Rc1 Rad8 21.Qa5 Na4 22.Nb3 (22.Qa4 Ra8) 22...b6 23.Qe1 Nc2! 24.Rc2 Bb3 25.Rd2 Qe4 26.Kg2 Qe3 27.Rd3 (27.Rd8 Rd8 28.Qh4 Re8–+) 27...Rd3 28.ed3 Bd5 29.Qf2 Nc3 30.a4 Re8 31.d4 cd4 32.a5 d3 33.ab6 0–1. jada – marekt, ChessWorld.net, 2003.

5.d3 Nf6 6.de4 Ne4 7.Nd2 Nc5 (7...Bf5 8.Ne4 Be4 9.e3=) 8.c4 (8.e3 Nbd7=) 8...Be6 9.Qc2 (9.e3 c6=) 9...dc4 (9...Qd7 10.cd5 Bd5 11.Ngf3=) 10.Nc4 Qd5 (10...Qd7 11.e3=) 11.e3 Bf5 12.Rd1 Qe6 (12...Nbd7 13.Rd5 Bc2 14.Nf3+=) 13.Qd2 Nbd7 14.Nf3 (14.Na5 Ne4 15.Qc1 Ra5 16.Qc7 Ba3 17.Qa5 Bb2–+) 14...0–0–0? (better is 14...Ne4 15.Qc1 Qh6+=) 15.Qa5 (better is 15.Nd4 Qe4 16.Nf5 Qf5 17.Qa5+–) 15...Kb8?? (15...Nb8 16.Nd4 Qg6+–) 16.Be5 Rc8 (16...b6 17.Nb6! Qb6 18.Qb6 Nb6 19.Rd8 Kb7+–) 17.Rd7! Nd7 (17...Nd7 18.b6 Combination; 17...Qd7 18.Nb6 Double attack (18.Nb6 Decoy)) 18.b6 Nb6 19.Nb6 Qb6 20.Qb6 f6. Mensch – Computer, Chess Game, 2017.

5.d3 Nf6 6.de4 Ne4 7.Nf3 Bc5 8.Bd4 Bd4 9.Qd4 (9.Nd4? Qf6 10.f3 Qh4 11.g3 Ng3 12.hg3 Qh1–+) 9...0–0 10.Nbd2 c5 11.Qb2 Nd2 12.Nd2 Re8 Black intends d4 13.0–0–0 d4 14.e4 Nd7 15.Bd3 Nb6 16.Rhe1? (better is 16.c4!?–/+) 16...Na4–+ 17.Qb3 Nc3 Black prepares the advance a4 18.Kb2?? (18.Bc4 Be6 19.Nf3–+) 18...Be6 19.Nc4 a4 (19...a4 20.Qc3 dc3 21.Kb1 Qd4–+) 0–1. Goudreau,Alec – Schirmer,Michael, email 4AMM–01, 1997.

5.d3 Qg5 6.Qd2 h6 7.Qg5 hg5 8.de4 de4 9.Nd2 e3 10.fe3 Nf6 11.Bf6 gf6 12.g3 g4 13.Bg2 c6 14.c4 f5 15.h3 Bd6 16.Kf2 Be6 17.hg4 (17.Rh2!?+=) 17...Rh1+= 18.Bh1 fg4 19.a4 Bb4 20.Nb3 Bc4 21.Nd4 Bd5 22.e4 Bc3 23.Rd1 Bd4 24.Rd4 Bb3 25.e5 cb5 (25...Be6 26.Rd6 Ke7 27.e3+=) 26.Rg4 ba4 27.Bb7 Ra7 28.Rg8 Kd7 29.Rb8 Kc7 30.Rc8 Kb7 31.Rc3 Kb6 32.Nf3 Rc7 33.Rc7 Kc7 34.Nd4 Bc4 35.Ke3 a3 36.Nc2 a2 37.Kd2 Kd7 38.Kc3 Be2 39.Kb2 Bc4 40.Nd4 Kc7 41.g4 a4 42.g5 Kd7 43.Ka1 Ke7 44.Kb2 Kd7 45.Ka1 Bb3 (45...Bd5–/+) 46.Ne2? (better is 46.Kb2!?–/+) 46...Ke6–+ 47.g6 fg6 (47...Ke5?! 48.gf7 Bf7 49.Nc3+=) 48.Nf4 ½–½. Woelfelschneider,Peter (1700) – Luzuriaga,Norberto H, 3. B4 Thementurnier, 2000.

5.e3 Nf6 =.

4.b5 Nf6

5.c4 (--> 3.c4 Nf6 4.a3 a5 5.b5).

4.d3 ab4

5.de4 ba3 6.Na3 Bb4 7.c3 Bc5 8.e3 Qf6 (better is 8...d6=) 9.Nb5+/– Ra1 10.Nc7 (10.Qa1?! Qd8=; 10.Ba1?! c6 11.c4 Qg6=) 10...Kd8 11.Qa1 h5 (11...Be3!? 12.fe3 Kc7+/–) 12.Nd5 Qe6 13.c4 f6 14.Nh3 Qe4 15.Nhf4 Na6? (15...Qc2 16.Bd3 Qb3+–) 16.Bd3 Qd3 (16...Qe8 17.Bd4 b6 18.Bc5 Nc5+–) 17.Nd3 g5 (17...Ke8+–) 18.Bf6 1–0. marekt – breaker, ChessWorld.net, 2004.

4.e3 Nf6

5.b5 d5 6.c4 c6 7.cd5 cd5 8.f4 (8.d3 Nbd7=) 8...Bc5+= 9.Ne2 Bg4 10.Qc2 Nbd7 11.Nd4 (11.h3 Be2 12.Be2 Rc8+=) 11...Nh5 12.g3 Rc8 13.Qb3 Nb6 14.a4 Bd4 (14...Nf6 15.h3 Bd7 16.Bc3+=) 15.Bd4+= Rc1 16.Kf2 Nc4 (16...Nf6 17.Bg2 Rh1 18.Bh1+=) 17.Bg2= Rh1 18.Bh1 Bf5 19.Na3 Be6 (19...Na3 20.Ra3 0–0 21.Ra2=) 20.Nc4 (20.Qd1 Nf6 21.Nc4 dc4 22.Bf6 Qf6 23.Be4 b6+/–) 20...dc4+= 21.Qd1 Qd5 22.Be4 Qe4 23.Qh5 0–0 24.Qe5 Qg6 25.b6 Bf5 (25...Ra8 26.e4 Bd7 27.Rc1+=) 26.h4 (26.Qa5 h6+/–) 26...Qg4 27.Qd5 (27.e4 Be6+/–) 27...Re8 28.Be5 (28.Qc4 Be4 29.Qe2 Qh3+=) 28...Bd3 29.Re1 (29.Qa5?? Qe2 30.Kg1 Be4 31.Bg7 Qg2) 29...Qh3 30.Qg2 (better is 30.Qb7!? f6 31.Qd5 Kh8 32.b7 Qh2 33.Kf3 Be2 34.Re2 Qh1 35.Rg2 Qf1 36.Kg4 Qd1 37.Kf5 fe5 38.Qf7 Qa4 39.fe5+/–) 30...Qd7+= 31.Ra1 f6 32.Bc3 Be4 33.Qg1 Qd5 34.g4 Qc5 (34...Re6 35.Bd4+=) 35.g5= f5 (worse is 35...Qb6 36.gf6 g6 37.Qg5+/–) 36.Bd4 Qd5 37.Qd1 Bg2 (37...Bd3!?=) 38.Rb1+= Qe4 (38...Qc6 39.Rb5 Bh1 40.Qf1+/– (40.Rf5?? Qg2 41.Ke1 Qg3 42.Kf1 Bg2 43.Ke2 Qf3 44.Ke1 Qf1)) 39.Rb5+/– Bh1 40.Qe2 (better is 40.Qf1!?+–) 40...Rc8 41.Re5 (41.Ra5?! Qg2 42.Ke1 Qh3+=) 41...Qg2 42.Ke1 Qh3 43.Re7 Bf3 (43...Qh4? 44.Qf2 Qf2 45.Kf2+–) 44.Rg7 Kf8 45.Qf1 Qh4 ½–½. Logvinov,Kirill – Astrotenko,Alexey, RUS SFO–ch, 2007.

5.b5 d5 6.d3 Nbd7 7.c4 dc4 8.de4 Ne4=.

3.a3 c5

4.c4 Nf6 5.b5 Be7 6.e3 0–0 7.Nc3 b6 8.d3 ed3 9.Bd3 Bb7 10.Nf3 d5 11.cd5 Nd5 12.Nd5 Qd5 13.Qc2 a6 14.Bh7 Kh8 15.Rd1 Qh5 16.Be4 Be4 17.Qe4 Ra7 18.ba6 Qh6 19.0–0 Na6 20.Rd5 Kg8 21.Rfd1 Nb8 22.Ne5 Qe6 23.Qf3 Rc8 24.Nd3 Nd7 1–0. Marinelli,Giorgio – McCarter,Robert, IECG, 1999.

4.e3 Nf6

5.bc5 Bc5

6.Bf6! Qf6 7.Nc3 Qe5 8.Bc4! Nc6 9.Nge2 b6 10.Bd5 f5 11.0–0 Bd6 12.Ng3 Ba6 13.f4 Qf6 14.Nge2 Rc8 15.g4 Ne7 16.Bb3 Qg6 17.Rf2! fg4 18.Ng3 Rc3 19.dc3 Bc5 20.Qd2 Nf5 21.Qd5 Ng3 22.hg3 Rf8 23.Rd1 Bb5 24.f5 Qc6 25.Qe5 Kd8 26.a4! Ba4 27.Ba4 Qa4 28.Qg7 Qc6 29.Kg2? Kc8 30.f6 a5 31.Rf5! a4 32.Rdd5 Ba3 33.f7?! Qg6 34.Qe5? Qe6 35.Qf4? Rf7! 36.Qg4 Rf5 37.Rf5 Bb2 38.Rf8 Kb7 39.Qf4 Qc6 40.Qb8 Ka6 41.c4 a3 42.c3 Bc1 43.Qe5 a2 44.Qb8 Be3 45.Qa8 Qa8 46.Ra8 Kb7 47.Ra2 Bg5 48.Re2!+– e3 49.Rb2 Kc6 50.Kf3 h6 51.Ke4 Kc5 52.Kd3 Kc6 53.Rb5 d6 54.Rb1 Kc5 55.Rb2 Kc6 56.Kd4 Kc7 57.Kd5 Bf6 58.Re2 Bg5 59.Re1 Kd7 60.Rd1 Bf6 61.Rd3 Bg5 62.Rd4 1–0. Ermenkov,Evgeny – Adorjan,Andras, Riga, 1981.

6.Bf6 Qf6 7.Nc3 Qe5 8.Bc4 Nc6 9.Nge2 Bb6 10.Ng3 f5 11.Nd5 g6 12.0–0 Bd8 13.f3 b5 14.Bb3 ef3 15.Qf3 Bb7 16.d4 Qg7 17.Ne4 Be7 18.Nec3 Na5 19.Nb5 Nb3 20.Ndc7 1–0. Benassi,Aspasio – Quirini,Luciano, email, 1999.

3.a3 d5

4.Nc3 d4 5.Ne4+/– Bf5 6.Ng3 Bg6 7.Nf3 c5 8.e3 de3 9.fe3 cb4 10.Bb5 Nc6 11.ab4 a6 12.Bc6 bc6 13.0–0 Bb4?? 14.Bg7+– Bd2 15.Nd2 (15.Nd2 Qg5 16.Bh8 Qe3 17.Kh1+–) 1–0. guest5109 – guest3673, ICC, 2005.

4.Nc3 Be6 5.e3 Nf6 (5...a5 6.b5 (6.ba5 Nf6 7.Nge2 Ra5 8.Nd4 Bd7 9.Be2+=) 6...Nf6 7.Nge2 Bd6 8.Nd4 0–0 9.Be2=) 6.d3 (6.Nge2 a5 7.b5 Bd6 8.Nd4 0–0 9.Be2=) 6...Nc6 (6...a5 7.ba5 Nbd7 8.de4 de4 9.Nge2=) 7.de4 de4 8.Bb5 Bd6 (8...Qe7 9.Bc6=) 9.Qd4 Bd7 (better is 9...Bf5!?=) 10.Bc6+/– Bc6 11.Nge2 (11.b5 Bd7 12.Ne4 Ne4 13.Qe4 Qe7 14.Qb7 0–0+/–) 11...0–0 (better is 11...Qe7+=) 12.b5+/– Qd7 (better is 12...Bd7!? 13.Ne4 Bb5 14.Nf6 Qf6 15.Qf6 gf6 16.Bf6 Rfe8+/–) 13.bc6+– Qc6 14.0–0 (14.Qa4 Qa4 15.Na4 Ng4+–) 14...b5 15.Ng3 a5? (better is 15...Rfe8+–) 16.Nce4 Be7 17.Nf5 Rad8 (17...Qe4 18.Qe4 Ne4 19.Ne7 Kh8+–) 18.Ne7 Kh8 19.Nc6 (better is 19.Qd8! Qe8 20.Qe8 Ne8+–) 19...Rd4 20.Bd4 Ne4 21.Na5 (better is 21.Rfb1!? Nd6+–) 21...c5 22.c3 (better is 22.Bb2 Ra8 23.Rfd1 h6+–) 22...cd4 23.cd4 f5 (23...Nc3 24.Rfe1 Rc8 25.Nb7+–) 24.Nc6 (24.Rfb1 Nd6+–) 24...g5 (24...Nc3 25.Rfe1 Ra8 26.f3+–) 25.Rfb1 Kg7 (25...Rf6 26.Na7+–) 26.Rb5 g4 (26...Kf6 27.a4+–) 27.Rb8 Rf6 28.Ne5 h5 (28...Ra6 29.Rb7 Kh6 30.a4+–) 29.a4 (better is 29.Rc1 Rf7 30.Nf7 Kf7+–) 29...Kh6 (29...Ra6 30.Rb7 Kh6 31.a5+–) 30.a5 h4 31.a6 g3 32.fg3 hg3 33.Nf3 gh2 34.Nh2 Nc3 35.a7 Ne2 36.Kf2 Nc3 37.a8Q Ne4 38.Kf3 (38.Ke1 Kh5 39.Rh8 Rh6 40.Qe8 Kg5 41.Rg8 Rg6 42.Qg6 Kh4 43.Nf3) 38...Nd2 39.Kf4 Kg7 (39...Rd6 40.Rh8 Kg6 41.Qf8 Rd4 42.ed4 Ne4 43.Rh6) 40.Rg8 Kf7 (40...Kh6 41.Rh8 Kg6 42.Qg8) 41.Qe8 1–0. Trkn – pat, itsyourturn.com, 2000.

4.c4 f6 5.cd5+= Qd5 6.Nc3 Qh5 7.Ne4 Bf5 (7...a5!?+/– 8.Ng3 Qg6 9.Qa4 Bd7+/–) 8.Ng3+– Qg6 9.Nf5 Qf5 10.Rc1 c6 11.d4 (11.e3 Bd6+–) 11...Ne7 (better is 11...a5!?+/–) 12.e3+– Nd5 13.Bd3 Qd7 14.Qh5 g6 (14...Kd8+–) 15.Bg6! Kd8 (15...hg6 16.Qh8) 16.Bf5 Qg7 17.Be4 Ne7 (17...Qd7 18.Ne2+–) 18.b5 (18.d5 cd5 19.Bd5 Nd5 20.Qd5 Nd7 21.Qb7 Rb8 22.Qa7 Ke8+–) 18...Nd7 19.bc6 bc6 20.Qa5 Nb6 21.Ne2 f5 22.Nf4 Kd7 (22...Qf6 23.Bf3 Rg8+–) 23.Bc6! Nc6 24.Qf5 Kc7 (24...Ke8 25.Rc6 Rb8+–) 25.Ne6 (25.Ne6 Kb7 26.Ng7+–) 1–0. Wall,Bill – Devvon, Microsoft Gaming Zone, 1999.

4.d3 e3 5.fe3 Qh4 6.g3 Qh6 7.Bg2 Bd6 (7...Nf6!?+=) 8.Qd2+/– Ne7 9.Nc3 (better is 9.e4!? Qd2 10.Nd2 (10.Kd2?! de4 11.Bg7 e3 12.Kc3 Rg8+/–) 10...de4 11.Ne4+–) 9...c6+= 10.0–0–0 Nf5 11.e4 Ne3 12.ed5 Ng2? (12...Be7 13.d6 A) worse is 13...Bd6 14.Ne4 Be7 15.Bd4 Nd1 16.Qh6 gh6 17.Bh8+– (17.Kd1?! Rg8=); B) 13...Bf6+/–) 13.Qh6+– gh6 14.Ne4 0–0 15.Nd6 Ne3 16.Re1 Nd5 17.e4 Nb6 (17...Nc7 18.Be5+–) 18.Bf6 (18.Nc8?! Nc8 19.Nf3 a5+–) 18...Be6 19.Be7 N8d7 (19...Rc8 20.Nc8 Nc8 21.Bf6+–) 20.Bf8 Nf8 21.Nb7 Na4 22.Ne2 Rb8 23.Nc5 (23.Nd6!? Rd8 24.Nf5 Bf5 25.ef5 Nb6+–) 23...Nc5 24.bc5 Rb5 25.d4 Ra5 26.Kb2 Rb5 27.Kc3 Ra5 28.Ra1 Ng6 29.Nf4 Ra4 30.Ne6 fe6 31.Rhf1 (31.Rhb1!? e5 32.Rb4 ed4 33.Kd4 Ra6+–) 31...e5 32.d5 cd5 (32...Re4 33.dc6 Ne7 34.Rae1 Re1 35.Re1+–) 33.ed5 Ne7 34.d6 Nd5 (34...Nc6+–) 35.Kb3 Rd4 36.Rad1 (36.Rad1 Ne3 37.Rd4 Nf1 38.Rd5+–) 1–0. Fournier,Frederic (2095) – sesgoalfil (2045), Active, 2002.

4.d3 f6 5.de4 c6? (better is 5...de4!? 6.Qd8 Kd8+=) 6.ed5+/– cd5 7.e4! Ne7 (7...de4 8.Bb5 Pinning) 8.ed5 Nd5 9.c4 Qe7 10.Qe2 Qe2 11.Be2 (11.Ne2!? Nc7 12.Nbc3+/–) 11...Nf4 12.Nc3 a5 13.b5 Ne2 (13...Ng2!? 14.Kf1 Nf4+=) 14.Nge2+/– Bc5 15.0–0 0–0 16.Nd5 Nd7 17.Nef4 Ne5 18.Rac1 b6 (18...Bf5 19.Rfe1+/–) 19.Rfe1 Ng4? (19...Bb7+/–) 20.Ne3?? (better is 20.Nd3+–) 20...Ne3+= 21.fe3 g5? (better is 21...Re8!? 22.Nd5 Bb7+=) 22.Nd5+– f5 23.a4 Bb4 (23...Bb7 24.Bd4 Rad8 25.Rcd1 Bd4 26.Ne7 (26.ed4?! Bd5 27.cd5 Rd5+=) 26...Kg7 27.ed4+–) 24.Re2 Bb7 (24...Rb8 25.Be5 Rb7 26.Bd4+–) 25.Nb6 Rae8 (25...Rad8 26.c5 Rd2 27.Kf2+–) 26.Nd5 (26.Nd7!? Be4+–) 26...f4 (26...Bd5 27.cd5 Rf7 28.Rf2+–) 27.e4 f3 (27...Bc5 28.Kf1+–) 28.gf3 Rf3 29.Nf6 Rf6 30.Bf6 Bc5 31.Kf1 Be4 32.Ree1 (better is 32.Rd1!? h5+–) 32...Bd3 33.Kg2 Rf8 (33...Re1 34.Re1 Bc4 35.Re5+–) 34.Bg5 Rf2 35.Kg3 Rf5 (35...Ra2 36.Re8 Kf7 37.Rd8+–) 36.Bf4 h5 (36...Ba3 37.Ra1 Bb4 38.Re8 Kf7 39.Rc8+–) 37.h4 (37.Re5 Re5 38.Be5 Bg6+–) 37...Bb4 (37...Ba3 38.Rcd1 Bc4 39.b6+–) 38.Re8 Kf7 39.Rd8 Be4 40.c5! Bc5 (40...Bc5 41.Rh8 Decoy; 40...Rc5 41.b6 Passed pawn) 41.Rd7 Ke6 42.Rc7 Bf2 (42...Bd6 43.Bd6 Rf3 44.Kh2 Kd6+–) 43.Kf2 Rf4 44.Ke3 Rh4 45.R7c6! Ke5 (45...Bc6 46.bc6 Passed pawn) 46.R6c5 Kf6 (46...Bd5 47.b6 Re4 48.Kf2 Rf4 49.Kg1 Rg4 50.Kh2 Kd6 51.Ra5 Rh4 52.Kg3 Rg4 53.Kf2 Rf4 54.Ke3 Re4 55.Kd3 Rb4+–) 47.R1c4 Rh3 48.Ke4 h4 (48...Rh1 49.b6 Re1 50.Kd5 Re5 51.Kd4+–) 49.Kd5 (better is 49.Rc6!? Ke7 50.Rc7 Kd8+–) 49...Rd3 50.Kc6 h3 51.Rh4 Ke7 (51...Rd8 52.Rh3 Rc8 53.Kd6 Rd8 54.Kc7+–) 52.Rch5 Rd6 53.Kc5 Rd3 54.Rh3 Rd2 55.b6 Rc2 56.Kb5 Rb2 57.Ka5 Kd7 58.Rc5 Kd8 59.Rh7 1–0. Fournier,Frederic – bcpatriot, ICC, 2005.

4.d3 Bg4 5.de4 Qg5? 6.ed5 Nd7 7.g3 0–0–0 8.Bg2 Ngf6 9.Nf3 Ne5?? 10.Ne5 Rd5 11.Bd5 Bh5 12.Nf7 Qg4 13.Bf3 Qh3 14.Qd8 1–0. mgriffin – gpr (1660), net–chess.com, 2001.

4.d4 f5 5.e3= Nf6 (5...Bd6 6.Nh3 (6.c4 Nf6 7.Nh3 0–0 8.Nc3+=) 6...Nf6 7.c4 c6 8.Nc3+=; 5...a5 6.b5 Nf6 7.Nh3 Nbd7 8.Nd2+=) 6.Ne2 (6.c4 f4 7.ef4 Be7 8.Qc2+=; 6.Nh3 Bd6 7.c4 0–0 8.Nc3+=) 6...Bd6 7.g3 (7.Nf4 0–0 8.Qd2–/+) 7...Nbd7 8.Nbc3 (8.Nd2–/+) 8...c6 9.Bh3 Nb6 10.0–0 g5 11.Bg2 h5 12.f4 g4 13.Kf2 h4 14.Rh1 h3 (14...Nc4!? 15.Bc1–+) 15.Bf1–/+ Nc4 16.Ra2 a5 17.Nc1? (better is 17.b5–/+) 17...ab4–+ 18.ab4 (18.Nb1 Nb2 19.Rb2 ba3–+) 18...Ra2 19.N1a2 Nb2 20.Qc1 Nc4 21.Bc4 dc4 22.Qa3 Nd5 23.Nd5 cd5 24.c3 0–0 25.Ra1 b6 26.Nc1 Bb7 27.Qa7 Qc7 28.Qa3 Qc6 29.Qb2 Ra8 30.Ra3 Kh7 31.Ke2 Bc8 32.Kd2 Ra6 33.Qa2 Qa8 34.Ra6 Qa6 35.Qa6 (35.Qb2 Kg7–+) 35...Ba6 36.Kc2 Kh6 37.Kb2 Bf4! 38.ef4 (38.ef4 Bb5 Combination; 38.gf4 g3 Combination) 38...Bb5 39.Ka3 Kg6 40.Ne2 Kf6 41.Nc1 ½–½. Makszewski,Maciej – Zieniuk,Kacper, Mistrzostwa Miedzywojewodzkie Mlodzikow POL, 2011.

4.Bd4 Nf6 5.e3 Be7 6.g3 Nc6–/+ 7.Bc5 Bc5 8.bc5 0–0 9.f3 b6 10.cb6 cb6 11.fe4 Ne4 12.d3 Nf6 13.Bh3 Bh3 14.Nh3 Re8 15.0–0 d4 16.e4–/+ Qc8 17.Nf2 a5 18.c3 dc3 19.Nc3 Nd4 20.Nd5 Qc2?? 21.Nf6+– gf6 22.Qg4 Kh8+/– 23.Rfe1 Rg8+= 24.Qh5 Rg6 25.Qd5 Nf3=+ 26.Kg2 Nh4?? 27.Kf1+– Rag8 28.Re2 Qa4?? 29.Nd1 Nf3+/– 30.Qf7?? Qd4–+ 31.Ne3?? Qa1 32.Kf2 Nh2 33.g4 Qd4 34.Kg2 Ng4 35.Ng4 Rg4 36.Kf3 Qd3 37.Re3 Rg3 38.Kf4 Qe3 39.Kf5–+ R3g5 40.Ke6 Qe4 41.Kd7 Qa4 42.Kc7 R5g7 (42...R5g7 43.Qg7 Kg7 44.Kb6 Qa3–+; 42...Rc5 43.Kb7 Qc6 44.Ka6 Ra8 45.Qa7 Qc8 46.Kb6 Qc6) 0–1. xCalvin – nandy conure, ChessWorld.net, 2005.

4.g3 a6 5.Bg2 Nf6=+ 6.e3 Bd6 7.Ne2 0–0 8.0–0 Nc6 9.d3 Bf5 10.d4 h6 11.Nd2=+ b5 12.f3 Re8 13.f4?? Ng4–+ 14.Qc1 Ne3 15.Rf2? a5 16.ba5 Na5 17.Nb3 Nb3 18.cb3 Ng2 19.Kg2 e3 20.Rf1 Qd7 21.Kg1 Bh3 22.Re1 c6 23.b4 f5 24.Qc3 Bg4 25.Nc1 e2 26.Nd3 Rac8 27.Nc5 Bc5 28.dc5 Re7 29.a4–/+ Qe6 30.Kf2 Qe4 31.Qd4 Rce8 32.Rac1?? Qf3 33.Kg1 Bh3 34.Qf2 Re3 35.Re2?? Qf2 36.Rf2 Re1 37.Rf1 Bf1 38.Re1 Re1 39.Kf2 Re2 40.Kf1 Rb2 41.a5 Rb4 42.Ke2 Ra4 43.Kd3 Ra5 44.Kd4 b4 45.Ke5 b3 46.Kd6 b2 47.Kc6 b1Q 48.Kd5 Qb5 49.Kd6 Qc5 50.Ke6 Qb6 (50...Qb6 51.Ke7 Ra7 52.Ke8 Qb8; 50...Ra7 51.h3 Re7) 0–1. gdraper (2035) – iboyd (1950), net–chess.com, 2006.

4.Nc3 Nf6

5.e3 a5 6.ba5 Ra5 7.Be2 =+.

5.e3 a5 6.b5 Bd7 7.d3 ed3 8.Bd3 c6 9.Nf3 Bd6 10.0–0 0–0 11.Re1 Re8 12.Rb1 Ne4? (better is 12...Bg4+=) 13.Be4+– de4 14.Qd6 Re6 15.Qg3 Rg6?? (better is 15...ef3 16.Red1 Qe8+/–) 16.Qh4+– ef3 (16...Qh4 17.Nh4 Rh6+–) 17.Qd8 1–0. COMP – NN, 2003.

5.e3 Nc6 6.g3 (6.Bb5 a5 7.ba5 Ra5=) 6...Bd7 (6...d4 7.ed4 Nd4 8.f3+=) 7.Nge2 a5 8.Nf4 (8.b5 Ne5 9.Nd4 Bd6+=) 8...Bg4 (8...ab4!? 9.ab4 Ra1 10.Ba1 Bg4–/+) 9.Be2+= Be2 10.Qe2 (10.Nce2!? ab4 11.Bf6 gf6 12.ab4 Ra1 13.Qa1 Nb4 14.Qb1=) 10...ab4–+ 11.ab4 Ra1 (worse is 11...Nb4 12.Ra8 Qa8 13.0–0–/+; 11...Bb4 12.Ra8 Qa8 13.Ncd5+/–) 12.Ba1 Nb4 13.Qb5 Qd7 14.0–0 Qb5 (14...c5!? 15.Rc1–+) 15.Nb5–/+ c6 16.Nd4 (16.Bf6 cb5 17.c3 gf6 18.cb4 d4=) 16...c5 17.Nb5 (17.Nf5 Nc2 18.Bf6 gf6 19.Nd5=) 17...Na6?? (better is 17...d4–+) 18.Bf6= gf6 19.Nd5 Bg7? (19...Be7 20.f3 (20.Ne7?! Ke7 21.d4 ed3 22.cd3 Nb4=) 20...ef3 21.Rf3+/–) 20.Rb1?? (20.Nd6!? Kd7 21.Ne4+–) 20...Kd7+/– 21.Nbc3 Rb8 (21...Ke6 22.Rb7 Rb8 23.Re7 Kd6 24.Rf7 Bh8+–) 22.Ne4+– Ke6 23.Ndf6 Bf6 24.Rb6 Ke5 25.Nf6 (25.Rf6?! Ke4 26.d3 Ke5 27.Rf7 Nb4=) 25...Nb4 (25...Rc8+–) 26.Nd7 (26.Nd7 Ke4 27.d3 Kf5 28.Nb8 Nc2 29.Rb7+–) 1–0. Dopper,Johan – Bandsma,Arend, 1991.

5.e3 Bd6 6.Nb5 0–0 7.Nd6 Qd6 8.Ne2 Bg4 9.h3 Be2 10.Be2 Nc6 11.d3 a5 12.b5 Ne7 13.c4 c6 14.Qa4 Rfc8 15.Rd1 b6? (15...Qe6 16.0–0+=) 16.bc6 (16.de4 cb5 17.cb5 Qe6 18.ed5 Ned5+/–) 16...Rc6? (better is 16...dc4 17.Qc4 Rc6+=) 17.de4+– b5? (17...d4+–) 18.cb5 (18.Qb5?! Ne4 19.cd5 Rc2+–) 18...Rc5 (18...Qb8 19.ed5 Rb6+–) 19.e5 Qd7 20.ef6 Nf5 21.fg7 Qb7 22.0–0 Nd6 23.Bd3 Nb5 (23...Qe7+–) 24.Qh4 1–0. pierre – kikinurass, ChessWorld.net, 2005.

5.e3 Bd6 6.Nb5 Nc6 7.Nd6 Qd6 8.b5 Ne7 9.Ne2 Bf5 10.Ng3 0–0 11.Be2 c6 12.0–0 Qe6 13.f3 ef3 14.Bf3 (14.gf3?! c5=) 14...Ne4 15.Nf5 Qf5 16.d3 Nd6 17.bc6 bc6 18.Bg4 Qg5 19.Qf3 f5 20.Bh3 Qh6 21.Qg3 Qg6 22.Qg6 Ng6 23.Bd4 Rf7 24.Rab1 Ne7 25.Bc5 Nec8 26.g4 g6 27.gf5 gf5 28.Kh1 Kg7 29.Rf2 Kh6 30.Rf4 Kg5 31.Bd4 h5 32.Rg1 Kh6 33.Be5 Re7 34.d4 Nc4 (34...c5 35.Bf5 Re5 36.de5 Nf5 37.Rf5+–) 35.Rf5 (35.Bf5?! Ne5 36.de5 Rg7+/–) 35...Re5 36.de5 (36.Re5?! Ne5 37.de5 Ne7+=) 36...Ne3 37.Rf8 (37.Rf6!? Kh7 38.Rg5 Ne7 39.Rh5 Kg7+–) 37...Nb6 38.Rf6 Kh7 39.Bf5 Nf5 40.Rf5 Kh6 41.Rf6 Kh7 42.Rf7 Kh6 43.Rfg7 h4 44.R7g6 Kh7 45.R6g4 a5 (45...Re8 46.Rh4) 46.Rh4 1–0. pierre – cowmov, ChessHere.com, 2006.

4.c4 d4

5.d3 a5 A) 6.b5 e3 7.fe3 de3 8.Qc1 Qe7 9.Nf3 (9.Nc3 Nf6= 10.Nd1 Ng4+=) 9...Nh6 10.Nc3 c6+=; B) 6.Qa4 Bd7 7.b5 B1) 7...ed3 8.Bd4 Bf5 9.Nf3 Nd7 (9...de2 10.Be2 c5+=) 10.ed3 Nc5+=; B2) 7...Qe7 8.Bd4 ed3 9.Ra2 Nh6+= B21) 10.Rd2 Nf5+= (10...Bf5+/–); B22) 10.Be3 Ng4+=.

5.d3 c5 6.bc5 Bc5 7.de4 Ne7 8.Nf3 The pressure on the isolated pawn grows 8...Nbc6 9.e3 de3 10.Qd8 Kd8 11.fe3 (worse is 11.Bg7 ef2 12.Ke2 Rg8+=) 11...f6 12.Kf2 Ng6 13.Nbd2 Bg4 14.Be2 Bf3 (14...Ke8!?+=) 15.gf3+/– (15.Kf3?! Nge5 16.Kf2 Re8+=; worse is 15.Bf3 Nge5 16.Be2 Ke7+=) 15...Kc7 16.Rad1 Rad8 17.Nb3 Be7 18.Rd8 (18.Nd4 Kc8+–) 18...Rd8+/– 19.Rd1 Rd1 20.Bd1 Nge5 21.Be2 h5 (21...b6!?+/–) 22.f4+– Ng4 23.Bg4 hg4 24.f5 (better is 24.Kg3!?+–) 24...a5 (24...Bd6 25.Kg2+=) 25.Kg3 a4 26.Nd4 Na5 27.Kg4 Nc4 Exerts pressure on the isolated pawn 28.Bc3 Ne3 (28...Kd7 29.Ne6 g6 30.Bd4 Na3 31.Kf4–/+) 29.Kf3+= Nc4 30.Bb4?? (better is 30.Ne6 Kc6 31.Ng7 Ne5 32.Ke2 Ba3 33.Nh5+=) 30...Bb4–/+ 31.ab4 Kd6 32.Kf4 a3 33.Nb3 (better is 33.Nb5!? Kc6 34.Nc3–/+) 33...a2–+ 34.Na1 Ne5 35.h4 (better is 35.Ke3–+) 35...Nd3 36.Ke3 Nb4 37.Kd4 b5 38.Kc3 Kc5?? (better is 38...Nc6–+) 39.Nb3= Kc6 (39...Kd6 40.Na1 Nc6–+) 40.Kb4+/– Kd6 41.Kb5?? (better is 41.Kc3 Ke5 42.Kd3+/–) 41...Ke5–+ 42.Kb4 Ke4 43.Ka3 Kf5 44.Ka2 Kg4 45.Kb2 Kh4 46.Kc3 g5 47.Kd3 Kg3 (better is 47...Kh3–/+) 48.Nd2?? (better is 48.Ke4!?=) 48...f5–/+ 49.Ke3 f4 (49...Kg2 50.Kd4 g4=) 50.Ke2 (50.Ke4!?=) 50...g4+= 51.Ne4? (51.Kf1 Kh2 52.Kf2 Kh1=) 51...Kg2–/+ 52.Ng5?? (better is 52.Nd2–/+) 52...f3–+ 53.Nf3 (53.Ke3 f2 54.Ne4 g3–+) 53...gf3 (53...gf3 54.Ke3 f2–+) 0–1. Fournier,Frederic – esbirro, Partie evaluee, 1m + 2s, 2009.

5.d3 e3 6.fe3 de3 7.Nf3 a5 8.b5= Nh6 9.Qc1 Qe7 +=.

5.d3 e3 6.fe3 de3 7.Nf3 Nf6 8.Qc1 Ng4 (8...Qe7!?=) 9.h3+/– Nf2?? (better is 9...Nh6+/–) 10.Qe3+– (10...Be7 11.Qf2+–) 1–0. Trkn – guest2530, ICC, 2004.

5.d3 e3 6.fe3 de3 7.Nf3 Bg4 8.g3 (8.Qc1 Qe7 9.Nc3 Nf6+=) 8...Nc6 (8...c5 9.Qc1 cb4+=) 9.Bg2 Nh6 (9...Qe7+=) 10.0–0 Qe7 11.Nc3 Be6 12.Qa4 Qd7 13.Ng5 0–0–0? (better is 13...Bg4+/–) 14.Ne6 (14.b5!? Nd4 15.Qa7 c6+–) 14...Qe6 15.Bc6 Qc6 16.Qa7 Qb6 (16...Re8 17.b5 Qb6 18.Qb6 cb6 19.Rf3+–) 17.Qb6 cb6 18.Nd5 f6 (18...b5 19.Rac1+–) 19.Ne3 Bd6 20.Nd5 Bc7 21.Bd4 (21.Nf6 gf6 22.Bf6 Rhe8 23.Bd8 Kd8+–) 21...Rhe8 22.Bb6 (22.e4 Ng8+–) 22...Bb6 (22...Rd5 23.Bc7 Rh5+–) 23.Nb6 Kc7 (23...Kb8 24.Ra2+–) 24.Nd5 Kc6 25.e4 Nf7 (25...Ng4 26.Rad1+–) 26.Nf6! Re6 (26...gf6 27.b5) 27.Nd5 Ne5 28.Rfd1 Nf3 29.Kg2 Nd4 30.b5 Kc5 31.a4 b6 (31...Nc2 32.Rac1 Nd4 33.Rf1+–) 32.Ra3 (32.a5 ba5 33.Ra5 Rd7+–) 32...Rd7 (32...Nc2 33.Ra2 Nb4 34.d4 Kc4 35.Ne3 Kb3 36.Raa1+–) 33.Rd2 (better is 33.a5!? ba5 34.Ra5 Rb7+–) 33...Ra7 34.Rf2 h5 (34...Re8 35.a5! Ra5 36.Ra5 ba5 37.Rf7+–) 35.Rf8 Nc2 36.Ra2 Nb4 (36...Ne1 37.Kf2 Nd3 38.Ke3+–) 37.Rc8 (37.Rc8 Rc6 38.d4 Kc4 39.Rc6 Nc6 40.bc6 Kd4 41.c7 Rc7 42.Nc7 Ke4 43.Rb2+–) 1–0. Trkn – odinthor, itsyourturn.com, 2000.

5.d3 e3 6.Nf3 ef2 7.Kf2 c5 8.bc5 Bc5 9.Nbd2 Nc6 =+.

4.c4 Nf6

(--> 3.c4 Nf6 4.a3 d5).

5.e3 (--> 3.e3 d5 4.a3 Nf6 5.c4).

4.d3 Nc6

5.b5 Na5 6.Bc3 b6 7.de4 Bb7 (better is 7...de4!? 8.Qd8 Kd8+=) 8.ed5+/– Bd5 9.Ba5 ba5 10.e3 Qg5 (10...Bd6!?+/–) 11.Nf3+– Bf3 12.Qf3 Rd8 13.Qc6 Rd7 14.Qe4 Ne7 15.Bc4 g6 16.Qa8 Rd8 17.Qf3 f5 18.Nd2 Bg7 19.Rd1 Bc3 20.Bd3 0–0 21.0–0 Kh8 22.Qb7 Qh5 (better is 22...Nd5+–) 23.Qc7 Nd5 24.Qa7 Be5 25.Nf3 Bg7 26.c4 Nc3 27.Rd2 g5 (27...Ra8 28.Qc7+–) 28.Qa5 g4 29.Nd4 Bd4 (29...Be5 30.f4 gf3 31.Nf3+– (31.Qc3? Qh2 32.Kf2 Qg3 33.Kg1 fg2 34.Rg2 Qe3 35.Rff2 Bd4–+)) 30.ed4 Ne4 31.Be4 fe4 32.Re1 Rd6 (32...Qg6 33.c5+–) 33.Re4 Rh6 34.Qc7 Rg8 (34...Rhf6 35.Qe5 Qf7 36.d5+–) 35.Qe5 Qe5 36.de5 (36…Re6 37.Rd6+–) 1–0. b4_player (2240) – Jack_D (2105), GameColony.com, 2003.

5.de4 Bg4? 6.ed5+– Ne5?? (6...Nce7 7.c4 Ng6+–) 7.Be5 Ne7 8.c4 Nf5 (8...Ng6 9.Bb2+–) 9.Qa4 c6 (9...Ke7 10.h3 Bh5 11.g4+–) 10.dc6 Qd6 (10...b5 11.cb5 Bd6 12.Bd6 Nd6+–) 11.Bd6 (better is 11.cb7 Qd7 12.ba8Q Ke7 13.Qd7 Kd7 14.Qb7 Kd8+–) 11...Bd6 12.cb7 Ke7 13.ba8Q Ra8 14.Qc6 Rb8 15.Qe4 Kf6 16.Qg4 Nd4 17.Nc3 Nc2 18.Kd2 Na1 19.Nd5 Ke5 20.Nf3 1–0. Fournier,Frederic (1800) – Bruno14 (1720), AJEC corr, 2012.

4.d3 ed3

5.cd3 d4 6.Nf3 Nc6 (6...c5!?=) 7.b5+/– Na5 8.Bd4 Be6 9.Nbd2 a6 10.ba6 Ra6 11.e3 Ra8 12.Be2 Nc6 13.Bb2 Bd6?? (13...Nf6 14.Ng5+/–) 14.0–0 (better is 14.Bg7 Be5 15.Ne5 Ne5 16.Bh8 Nd3 17.Kf1+–) 14...Nf6+/– 15.e4 0–0? (better is 15...Bf4+/–) 16.e5+– Ne5 17.Ne5 Be5 18.Be5 c5 19.Nf3 Nd5 20.Qc2 b6 21.Rfd1 Bf5 22.Qb2 f6 23.Bg3 Ne7 (23...Rc8+–) 24.d4 Nc6 (24...cd4 25.Nd4 Qc8 26.Rac1+–) 25.dc5 Qe7 (25...Qc8 26.cb6 Qb7 27.Nd4+–) 26.cb6 (26.Bc4 Kh8 27.Bd6 Qe8 28.cb6 Be4+–) 26...Rab8 (26...Qb7 27.Bc4 Kh8 28.Bd5+–) 27.a4 (better is 27.Bb8 Rb8 28.a4 Be6+–) 27...Nb4 (27...Rbd8 28.Rd8 Rd8 29.a5+–) 28.a5 (better is 28.Bc4 Kh8 29.Bd6 Qb7 30.Qb4 Rfe8 31.Bb8 Qb8+–) 28...Nc2 (28...Rbd8 29.a6 Be4 30.b7 Bf3 31.Rd8 Rd8 32.Bf3 Na6 33.Qa2 Kh8 34.Qa6+–) 29.Rac1 (better is 29.Bc4 Kh8 30.Bd6 Qe8 31.Bb8 Qb8+–) 29...Nb4 (29...Qe2 30.Bb8 Rb8 31.Ne1+–) 30.Qb3 (better is 30.Bd6 Qb7 31.Qb4 Rfe8+–) 30...Kh8 31.Rc7 (better is 31.Nd4 Ra8 32.Nf5 Qe2 33.Qb4 g6+–) 31...Qe2 32.Re1 Qb5 33.Nd4 (better is 33.Rc4 Qa5 34.Qb4 Qb4 35.Rb4 Rb7+–) 33...Qa5 34.Nf5 Qf5 (34...Nd3 35.Rd1 Qf5 36.Qd3 Qd3 37.Rd3 Rb6+–) 35.Qb4 h5 (35...Qd5 36.Rce7 Rbd8 37.b7+–) 36.Rc5 Qg6 (36...Qg4 37.Qb5 f5 38.Bb8 Rb8 39.Rf5+–) 37.Bb8 Rb8 38.b7 h4 39.Rc8 (39.Qh4 Kg8 40.Rc8 Qe8 41.Ree8 Kf7 42.Qh5 g6 43.Qh7) 39...Rc8 40.bc8Q Kh7 41.Qb1 (41.Qh4 Qh6 42.Qf5 g6 43.Re7 Kg8 44.Qe6 Kh8 45.Qh6) 41...f5 (41...Qb1 42.Rb1 h3 43.Rb8 Kh6 44.Qh3 Kg5 45.Rb5 f5 46.Qf5 Kh4 47.Rb4) 42.Qcf5 Qf5 43.Qf5 Kh6 (43...g6 44.Qf8 g5 45.Qf7 Kh6 46.Re6) 44.Re6 g6 45.Qg6 1–0. Fournier,Frederic – dolbymarker, Active, 2007.

5.cd3 Nf6 6.Nf3 Bg4 7.e3 Bd6 8.Be2 0–0 9.Nbd2 c6 10.0–0 Qc7 (10...Qe7 11.h3 Bf3 12.Nf3= (worse is 12.gf3 a5–/+)) 11.h3 (11.Bf6 gf6 12.h3 Bf5+=) 11...Bf3= 12.Nf3 Nbd7 13.Rc1 b5? (better is 13...a5 14.b5 Qb6=) 14.Nd4+/– Ne5 (14...Qb7!?+/–) 15.Nb5!+– Qe7 (15...cb5 16.Rc7 Pinning (16.Rc7 Deflection)) 16.Nd6 Qd6 17.Be5 Qe5 18.Rc6 d4 19.Rc5 Qd6 20.Bf3 Rad8 21.e4 Nd7 22.Rc2 Ne5 23.Qe2 (23.Bh5 Qa6+–) 23...f5 (23...Rc8!?+/–) 24.Rfc1 Nf3 25.Qf3 (25.gf3?! Qa6+/–) 25...fe4 26.Qe4 Rde8 27.Qc6 Qf4 28.Qc4 Kh8 29.Rf1 h6 30.a4 Rf6 31.b5 Rg6 32.Qc7 Qf5 33.Kh2 (better is 33.Qa7!? Qf3 34.g3 Qd3 35.Rfc1+–) 33...Qd3+/– 34.Rcc1 Qe4 35.Qc6?? (better is 35.Rg1!? Re7 36.Qb8 Kh7 37.Rc8+/–) 35...Qf4 (better is 35...Rc6 36.bc6 d3–+) 36.g3= Rc6 37.gf4 Rf6 (37...Rd6 38.Rfd1+=) 38.Kg3 Re2? (38...Rd6 39.Rfd1+=) 39.Rfe1 (39.Rc8 Kh7 40.Rc7+/–) 39...d3? (better is 39...Re1 40.Re1 Rd6+/–) 40.Re2+– de2 41.Re1 Re6 42.Kf3 g5? (42...Re7 43.Re2 Rb7 44.Rb2+–) 43.Re2 (43.fg5!? hg5 44.Re2 Rh6+–) 43...Rf6 44.Re4 gf4 (44...Rf7 45.a5+–) 45.Rf4 (better is 45.Re8!? Kh7 46.Re7 Kg6 47.Ra7 Kg5+–) 45...Rd6 46.Kg4 Kg7 47.a5 Rd5 (47...Rd2 48.Rc4 Rb2 49.Rc5+–) 48.Rf5 Rd1 49.f4 (49.Rc5!? Rb1+–) 49...Kg6 50.Re5 Rg1 51.Kf3 Kf6 52.b6 (better is 52.Rc5+–) 52...ab6+/– 53.ab6 Rb1 54.Rh5 Kg6 55.Re5 Rb6 (55...Kf6 56.Kg4+–) 56.Ke4 (better is 56.Rd5!?+/–) 56...Rb4= 57.Kd5 Kf6 (57...Rf4 58.Re3=) 58.Kc5 (better is 58.Re6!? Kf7 59.Rh6 Rf4 60.Ke5+/–) 58...Rf4= 59.Rd5 Rf5 0–1. Fournier,Frederic (1795) – ciervo (1710), Active, 2005.

5.ed3 a5 6.b5=.

5.ed3 Be6 6.Ne2 Nf6 7.Nf4 (7.Nd4 Bd7=) 7...c5 (7...Bd6 8.Ne6 fe6 9.c4=) 8.bc5 Bc5 9.Qe2 Qa5 (9...Qe7 10.Ne6 fe6 11.d4=) 10.Nd2+= Qb6 (10...Kd7!? 11.Ne6 fe6+=) 11.Bf6+/– gf6 12.Nd5 Qd6? (better is 12...Qd8!? 13.c4 Nc6+/–) 13.Ne4+– Qe5?? (13...Qc6 14.Ndf6 Ke7 15.Nc5 Qc5+–) 14.Nef6 (14.Nc5?! Qa1 15.Kd2 Kd8 16.Nb7 Kd7 17.Nc5 Kd6+/–) 14...Qf6 15.Nf6 (15.Nf6 Kd8 16.Qe5+–) 1–0. pozarski (2065) – mosha, GameColony.com, 2002.

5.ed3 Be6 6.Nf3 Nf6 7.Be2 Be7 8.0–0 0–0 9.Nbd2 Nc6 10.c4 d4 (better is 10...Re8!?=) 11.Nb3 a6 12.Nbd4 Nd4 13.Nd4 c5 14.Ne6 fe6 15.bc5 Bc5 16.Bf3 Rb8 17.d4 Bd6 18.c5 Bc7 19.g3 Nd5 20.Bd5 (20.Qe2 Qf6 21.Bg4 Rbe8+/–) 20...ed5 21.Rb1 Bb6?? (better is 21...Qd7+=) 22.cb6+– 1–0. Fournier,Frederic (1705) – pedropere, Active, 2005.

5.ed3 Qe7 6.Be2 Qg5 (6...Bg4 7.h3 Bh5 8.Nd2=) 7.Nf3+= Qg2 (7...Qg6!?+=) 8.Rg1+/– Qh3 9.Rg7 (worse is 9.Bg7 Bg7 10.Rg7 Qh6+=) 9...Qd7 (9...Qe6 10.Ng5 Qe7 11.Rf7 Qg5 12.Bh5 Qg1 13.Kd2 Qd1 14.Kd1 (14.Bd1? Bh6 15.Ke1 Kf7 16.Bh8 Nf6–+) 14...Bg4 15.Bg4 Kf7 16.Bc8+–) 10.Rf7! Qf7 (10...Qf7 11.Bh8 Discovered attack; 10...Kf7 11.Ne5 Double attack (11.Bh8 Discovered attack)) 11.Bh8 Bg7 (11...Nd7 12.d4+/–) 12.Ne5 (12.Bg7 Qg7 13.d4 Nf6+/–) 12...Qf6 (12...Qe7 13.Bh5 Kd8 14.Bg7 Qg7 15.Nf7 Ke7 16.Qe2 Kf8 17.Ne5+=) 13.Bg7 (13.Bh5 Kd8 14.Nf7 Ke7 15.Qe2 Be6 16.Bg7 Qg7+=) 13...Qg7+= 14.Bh5 Kd8 15.Nf7 Ke7 16.Qe2 Be6 17.Qe5 Qg1 18.Ke2 Nc6? (better is 18...Nd7 19.Qg5 Qg5 20.Ng5 Bf5+=) 19.Qc7+– Bd7?? (19...Kf6 20.Qf4 Bf5+–) 20.Qd6 Ke8 21.Ne5 Kd8 (21...Qg6 22.Bg6 hg6 23.Qd7 Kf8 24.Ng6) 22.Qd7 1–0. b4_player (2245) – gopi_kris, GameColony.com, 2003.

5.Qd3 c6 6.c4 Nf6 7.e3 a6 8.c5 Be7 9.Nf3 0–0 10.Ng5 g6 11.Be2 Bf5 12.Qd1 Ne4 13.Ne4+/– Be4 14.Bf3 Bf3 15.Qf3+= b6 16.cb6 Qb6 17.0–0 Nd7 18.Bd4 Qc7 19.Rc1 Bd6 20.g3 Be5+= 21.Qd1 Qd6 22.Ra2 Bd4 23.Qd4 Ne5 24.Kg2 Rac8 25.Rac2 Rc7 26.f4+/– Nd7 27.Nc3 c5 28.Qd5+– Rc6 29.bc5 Nc5 30.Qf3?? Rfc8? 31.Ne2 a5 32.Nd4 Rb6 33.a4 Rb4? 34.Qg4 Qd5 35.Kh3 Rbb8 36.Nf3 Rc7 37.e4 Qd6 38.Qg5 Rbc8 39.Rd2 Qe7?? 40.Qe7+– Re7 41.Rdc2 Rec7 42.Nd4 Na6 43.Rc7 Nc7 44.Nb5 Re8 45.Rc7 Re4 46.Rf7! Ra4 47.Ra7 h5 48.Kh4 Ra2 49.Kg5 Kf8 50.Kg6 Rh2 51.Rh7 Rb2 52.Kf6 Ke8 53.Rh5 a4 54.Ke6 Re2 55.Re5 Rg2 56.Re3 Kf8 57.Nd6 Kg7 58.Nc4 Rc2 59.Kd5 Kf6 60.Ra3 Rg2 61.Nd6 Kg6 62.Ne4 Kf5 63.Ra4 Re2 64.Nd6 Kg4 65.Ra3 Rd2 66.Ke5 Re2 67.Ne4 Re1 68.f5 Rb1 69.Rd3 Rb5 70.Rd5 Rb8 71.f6 Re8 72.Kd4 Rf8 73.Ke3 Rf7 74.Rg5 Kh3 75.Kf3 Kh2 76.Rh5 Kg1 77.g4 Kf1 78.Rh1 1–0. nay (2190) – iboyd (1950), net–chess.com, 2006.

5.Qd3 Be6 6.Qb5 c6 (6...Nd7!?=) 7.Qb7+/– Nd7 8.Qc6 Ne7 (8...a5 9.ba5 Rc8 10.Qa4+/–) 9.Qa4 (9.Qc3 Nf5+–) 9...Rc8 (9...a5!?+/–) 10.e3+– (10.Qa7 Rc2 11.Ra2 d4–/+) 10...Rc2?? (better is 10...a5+–) 11.Qc2 Nf6 (11...a5 12.ba5 Qa5 13.Qd2+–) 12.Bf6 gf6 13.Qc5 (13.Qa4 Bd7 14.Qa7 Bg7+–) 13...Nf5 (13...Qb6 14.Nf3+–) 14.Bb5 Bd7 15.Qd5 Ne7 (15...Nd6 16.Bd7 Qd7 17.Nf3+–) 16.Bd7 Qd7 17.Qd7 Kd7 18.Nc3 1–0. marus1 – GOD, internet, 2001.

5.Qd3 Nf6 6.Nc3=.

5.ed3 Nf6

6.Qe2 Be6 7.Nh3 Be7 8.Nf4 Qd7 9.Ne6 Qe6 10.c4 c6 (10...a5 11.b5=) 11.Qe6 fe6 12.d4 White prepares the advance c5 12...0–0 13.Nd2 Bd6 14.Bd3 Nbd7 15.Nf3 Rae8 16.c5 White gets more space 16...Bc7 17.0–0 e5 18.de5 Ne5 19.Ne5 Be5 20.Be5 Re5 21.Rae1 Ree8 22.Re8 Re8 23.Rd1 b6 24.Rc1 (better is 24.cb6 ab6 25.Rc1=) 24...Rf8 (24...bc5 25.Rc5 Re1 26.Bf1 Ne4 27.Rc6 Nd2 28.Rc8 Kf7–+) 25.cb6+/– ab6 26.Rc6 Ng4 (26...Ra8 27.Rc3+/–) 27.Rb6 Rf2 (27...Nf2 28.Bf1+/–) 28.h3+– Rd2 29.Bh7 (29.hg4 Inferior is 29...Rd3 30.a4 Ra3+–) 29...Kh7 30.hg4 d4 31.a4 d3 32.a5 Rb2 33.Rd6 Rb4 34.Rd3 Ra4 35.Rd5 Kg6 36.g5 Ra1 37.Kf2 Ra2 38.Kf3 Kf7 39.Re5 Ra3 40.Ke4 Ra4 41.Kd3 Ra3 (41...Rg4 42.g3+–) 42.Kc4 Ra2 43.Kb5 Rg2 (43...Rb2 is the last straw 44.Kc5 Rc2 45.Kb6 Rb2 46.Rb5 Re2+–) 44.a6 Rb2 45.Ka5 Ra2 46.Kb6 Rb2 47.Rb5 Rg2 (47...Re2 what else? 48.a7 Re8+–) 48.a7 Kg6 (48...Ra2 there is nothing else anyway 49.Ra5 Ra5 50.Ka5 Kg6+–) 49.a8Q Rg5 50.Qe4 1–0. lucya (2150) – J.Galt (1620), GameColony.com, 2002.

6.Qe2 Be7 7.Bf6 gf6 8.c3 Bf5 9.Nf3 Nd7 10.Nd4 Bg6 11.f4 0–0 (better is 11...f5!?=) 12.f5+/– Re8 13.Qf3 (worse is 13.fg6 Bf8 14.gh7 Kh7+=) 13...Bb4 14.Be2 Ne5 15.Qg3 Nd3?? (better is 15...Bc5+/–) 16.Qd3+– Bf5 (16...Bc5+–) 17.Nf5 Bc5 (17...Bd6+–) 18.Qg3 1–0. miehnekort – metallifanfan, Yahoo, 2005.

6.Qe2 Be7 7.Bf6 gf6 8.d4 Nc6 (8...0–0 9.Qf3=) 9.Qe3 Be6 10.Nf3 Qd6 11.b5 Na5 12.Nbd2 0–0–0 13.Qc3 Nc4 (13...Qb6 14.Bd3+=) 14.Nc4+/– dc4 15.Bc4 Rhg8 16.0–0 Bh3 (16...Qf4 17.Rfe1+/–) 17.Nh4 Qf4?? (better is 17...Be6 18.Rfe1 Rg4+/–) 18.Qh3+– Kb8 19.Nf5 Bd6 20.c3 (worse is 20.Qh7 Rh8 21.g3 Qe4+– (21...Rh7?? 22.gf4 Bf4 23.h4+–)) 20...Rg5 21.Nd6 Qd6 (21...cd6 22.b6+–) 22.Qh7 Rdg8 (22...Qf4 23.g3+– (23.Qf7?! Rg2 24.Kg2 Qg4 25.Kh1 Qf3 26.Kg1 Qg4 27.Kh1 Qf3 28.Kg1 Qg4 29.Kh1=)) 23.Bf7 Rf8 (23...Rg2 24.Kh1 Qf4 25.Bg8+– (25.Qg8 Rg8 26.f3 Rh8=)) 24.Bc4 Qf4 25.Qh3 c5 (25...f5 26.Rae1 Rc8 27.Re7+–) 26.bc6 bc6 (26...Qc7 27.Qh6 Rd8 28.Qf6 Rh5+–) 27.Rab1 Kc7 28.Qh7 Kd6 29.Rfe1 (29.Qa7?! Rg2 30.Kg2 Qg4 31.Kh1 Qf3 32.Kg1 Qg4 33.Kh1 Qf3 34.Kg1 Qg4 35.Kh1=) 29...Qg4 30.Qe7 1–0. market (2230) – huflix (1630), GameColony.com, 2003.

6.Nf3 Be7 7.Be2 0–0 8.0–0 Nc6 9.c4 d4 (9...Re8!?=) 10.Nbd2 b6 11.Nb3 Bg4 12.Nfd4 Nd4 13.Nd4 (13.Bg4 Nb3 14.Bf6 Bf6 15.Qb3 Ba1 16.Ra1 Qd4-/+) 13...Qd4?? (better is 13...Qd7+/-) 14.Bd4+– (14.Bd4 Be6 15.Be5+–) 1–0. Fournier,Frederic (1885) – Avaricia (1985), Active (5/0), 2005.

6.h3 Bd6 7.Nf3 0–0 8.Be2 Re8 9.0–0 a6 10.Re1 Nc6 11.c4 Be6 12.c5 Be7 13.Nbd2 b6 14.cb6 cb6 15.Nb3 h6 16.Nbd4 Nd4 17.Nd4 Bd6 18.Rc1 Rc8 19.Rc8 Qc8 20.Qc1 (20.Ne6 Re6 (worse is 20...fe6 21.Bf6 gf6 22.Bh5+/–) 21.Bf3 Qc6=) 20...Qc1 (20...Bh3!? 21.Nb3 Qc1 22.Nc1 Bf5–/+) 21.Rc1 Be5 22.Rb1 (worse is 22.Ne6 Bb2 (worse is 22...Re6 23.Rc8 Kh7 24.d4+/–) 23.Rc2 Be5–/+ (worse is 23...fe6 24.Rb2 Rc8 25.d4=)) 22...b5 23.Ne6 Bb2 24.Rb2 Re6 25.Kf1 Rc6 26.Bd1 Rc3 27.Rb3 Rb3 28.Bb3 d4 29.Ke2 g5 30.g3 Kg7 31.h4 Kg6 32.hg5 hg5 33.Kf1 Nd7 34.Bd5 Nb8 35.Ke2 f5 36.Kf3 Kf6 37.g4 Ke5 38.Bb7 Kf6 (38...f4 39.Ke2 Kd6=) 39.Bc8+– fg4 40.Kg4 a5 (40...Nc6!?+/–) 41.ba5+– Nc6 42.a6 Na7? (better is 42...Ne5 43.Kg3 Nc6+–) 43.Bb7 Kg6 44.f4 gf4 45.Kf4 Kf6 46.Ke4 Ke6 47.Kd4 Kd6 48.Ke4 Kc5 49.d4 Kc4 (49...Kd6 50.d5+–) 50.d5 Kb3 (50...Kc5 51.Ke5 b4 52.ab4 Kb6+–) 51.d6 Ka3 52.d7 b4 53.d8Q b3 54.Qa5 Kb2 55.Kd3 Nc6 (55...Nc8 56.Bd5 Nd6 57.Qc3 Kb1 58.Qb3 Kc1 59.Qc2) 56.Bc6 Kb1 57.Kd2 (57.a7 Kb2 58.a8Q Kc1 59.Qa1) 57...b2 (57...Kb2 58.a7 Kb1 59.a8Q b2 60.Be4) 58.Be4 1–0. Grabcheva,Natalia – Fowler,Hugo, Mureck AUT, EU Ch U11, 2013.

4.d3 Nd7

5.e3 a5 6.de4 de4 7.b5 Ngf6 8.Bc4 Bd6 9.Ne2 0–0 10.0–0 Ne5 11.Bb3 Neg4 12.Ng3 Nh2 13.Re1 a4 14.Bc4 Nhg4 15.Nf1 Qe7 16.Nc3 Rd8 17.Nd5 Nd5 18.Bd5 Be5 19.Be5 Ne5 20.f4 ef3 21.gf3 c6 22.bc6 bc6 23.Bf7 Kh8 24.Qe2 Qf7 25.Kg2 Ba6 26.Qf2 Bf1 27.Rf1 Nc4 28.Rad1 Qg6 29.Kh1 Qh6 30.Qh2 0–1. COMP – COMP, 2002.

5.e3 a5 6.de4 de4 7.b5 Ngf6 8.Bc4 Bd6 9.Ne2 0–0 10.0–0 Ne5 11.Bb3 Neg4 12.Ng3 Nh2 13.Re1 a4 14.Bc4 Nhg4 15.Nf1 Qe7 16.Nc3 Rd8 17.Nd5 Nd5 18.Bd5 Be5 19.Be5 Ne5 20.f4 ef3 21.gf3 c6 22.bc6 Qg5 23.Kh1 bc6 24.Bf7 Kf7 25.Qe2 Ba6 26.Qg2 Qg2 27.Kg2 Bf1 28.Rf1 Nc4 29.Rfe1 Rd2 30.Kg3 Rc2 31.e4 Ra6 32.Rh1 c5 33.Rhc1 Na3! 34.e5 Ke6 35.Rh1 Nc4 36.Rh7 0–1. COMP – COMP, 2002.

4.d3 f5

5.de4 fe4

6.c4 a5 7.b5 Nf6 8.e3=.

6.c4 dc4 7.Qd8+= Kd8 8.Nd2 (8.e3 a5 9.ba5 Ra5 10.Bc4 Nd7=) 8...e3 (8...b5 9.Ne4 a5 10.ba5 Ra5 11.Bc3=) 9.Nc4+= ef2 10.Kf2 Be6 (10...Nf6 11.Nf3+=) 11.e3 Nd7 (11...Nf6 12.Rd1 Ke8 13.Nf3+=) 12.Nf3 Ngf6 13.Rd1 Be7 14.Nce5 (14.Bd3 c5 15.bc5 Bc5+=) 14...c6 (14...Bd6 15.Nd4 Bg4 16.Nf7 Ke8 17.Nd6 cd6 18.Rc1+=) 15.Nd7+/– Bd7 16.Ne5 Kc7 (16...Rf8 17.Ke1+/–) 17.Nd7 Nd7 18.Bg7 Rhg8 19.Bh6 Rg6 (19...Bg5!? 20.Bg5 Rg5+/–) 20.Bf4+– Kc8? (better is 20...Bd6+–) 21.g3 Rg7 (21...Nf6 22.Bd3 b5 23.Bg6 hg6+–) 22.Bh3 Bf8 (22...Bg5 23.Rd7 Rd7 24.Rd1 Bf4 25.gf4+–) 23.Rd7 Rd7 24.Rd1 (24.Bd7?! Kd7 25.Rd1 Ke6+/–) 24...a5 (24...Kd8 25.Rd7 Ke8 26.Rb7 Rd8+–) 25.Rd7 b5 (25...Bd6 26.Bd6 h6 27.Rf7 Kd8 28.Rf8) 26.Rg7 Kd8 27.Bc7 1–0. wesolyPolak (1825) – putje (1840), GameColony.com, 2002.

6.c4 c6 7.cd5 cd5 8.Nc3 Nf6 9.e3 Bd6 10.Rc1 0–0 (better is 10...Be6!?=) 11.Nd5+/– Kh8? (better is 11...Nbd7+/–) 12.Nf6+– gf6 13.Rc8! Bb4 (13...Qc8 14.Qd6) 14.ab4 Qc8 15.Qd6 Nd7 16.f3 ef3 17.Nf3 Qe8 18.Bd4 Rc8 19.Ba7 Rc1 (19...Qf7 20.Bd4+–) 20.Kf2 Qc8 (20...Qf7 21.Bd4+–) 21.Bd3 Rh1 (21...Ne5 22.Rc1 Nd3 23.Qd3 Qc1+–) 22.Qe7 f5 (22...Rf7 23.Qf7 Qg8 24.Qd7 Qa2 25.Kg3 Qg8 26.Kh3 b6 27.Bb6 h5+–) 23.Bd4 Kg8 24.Qg7 1–0. fajgo – Alpha, internet, 2002.

6.c4 c6 7.cd5 cd5 8.e3 Nf6 9.Ne2 Bd6 10.Bf6 Qf6 11.Nec3 0–0 12.Ra2 Be6 13.Nd5 Qf7 14.Nbc3 Be5 15.Rd2+/– a5 16.b5 Nd7 17.Ne4 Bd5 18.Rd5 Bc3 19.Ke2 Nb6 20.Nc3 Qf2 21.Kd3 Nd5 22.Nd5 Qa2 23.e4 Qa3 24.Kd2 Qb2 25.Ke3 Qf2 26.Kd3 Rae8 27.b6 Qa2 28.Be2+= Rf2 29.Bf3 Qa3 30.Kd4 Ra2 31.Rf1 Qb2 32.Ke3 Ra3 33.Kf4 Qe5 34.Kg4 Re6 35.g3 Rg6 36.Kh3 Rh6 37.Kg2 Ra2 38.Rf2 Rf2 39.Kf2 Rh2 40.Ke3 Qg3 41.Ne7 Kf7–/+ 42.Nf5 Qg5 43.Kd3 Qd8 44.Ke3 Qb6 45.Kf4 Qc7 46.e5 Rb2 47.Qd5 Kf8 48.Kg4 g6 49.Nd6 Rb4 50.Kh3 Qe7–/+ 51.Ne4 Rb6 52.Qa5 Re6 53.Nd2 Re5–/+ 54.Qa8 Kg7 55.Qb7 h5 56.Nc4 Qb7 57.Bb7 Rb5 58.Ba6 Rb3–+ 59.Kh2 g5 60.Ne5 Kf6 61.Nd3 g4 62.Nc5 Ra3 63.Bc8 Ke5 64.Nd7 Kf5 65.Nc5 Kf4 66.Ne6 Ke5 67.Nd8 Rd3 68.Nc6 Kf4 69.Kg2 h4 70.Bg4 Rg3 71.Kh2 Kg4 72.Ne5 Kf4 73.Nd7 h3 74.Nf6 Rf3 75.Nd7 Re3 76.Nf6 Re6 77.Nh5 Kg4 78.Ng3 Re1 79.Nf1 Re2 80.Kg1 Rg2 81.Kh1 Kf3 82.Ne3 Kf2 83.Nf5 h2 84.Nh4 Rg4 85.Nf5 Rf4 86.Ng7 Rg4 87.Nf5 Rf4 88.Ng7 Ra4 89.Nf5 Re4 90.Ng3 Re5 91.Nh5 Kf3 92.Ng7 Kg3 93.Nh5 Kh3 94.Nf4 Kg4 95.Nd3 Re3 96.Nc5 Kh3 97.Nd3 Kg3 98.Nf2 Re1 0–1. Pedro (2290) – Ranzpendang (2140), internet, 2008.

6.c4 c6 7.e3 h5 8.Nc3 Nf6 9.cd5 Nd5 10.Ne4 Bg4 11.Be2 Be2 12.Ne2 Ne3?? (better is 12...a5 13.ba5 Qa5 14.N2c3 Nc3 15.Bc3 Qd5+/–) 13.Qd8+– Kd8 14.fe3 h4 15.0–0 Rh6 (15...Ke8+–) 16.Rf8 Kc7 17.Be5 Kd7 (17...Kb6 18.Nf4+–) 18.Raf1 Ke6 19.Nf4 Ke5 20.Re8 Kf5 21.Nd3 Kg6 22.Ne5 Kh7 (22...Kh5 23.Rf5 g5 24.Rg5) 23.Ng5 1–0. arkadeles (2060) – Impulsive, ChessWorld.net, 2003.

6.e3 Nf6 7.c4 c6 8.cd5 cd5 9.Nc3 Be7 10.Bb5 Bd7 11.Bd7 Qd7 12.Nge2 Na6 13.Nf4 The pressure on the backward pawn d5 grows 13...Nc7 14.Qb3 Rd8 15.Rd1 Increases the pressure on the backward pawn 15...Qc6 16.0–0 g5? (16...0–0 17.Rc1 Qd6 18.f3 ef3 19.Rf3=) 17.Nfe2?? (better is 17.Nfd5 Ncd5 18.Nd5+–) 17...Rg8 18.Nd4 Qd7 19.Qa4 (better is 19.f3!? ef3 20.Nf3+/– (20.gf3?! g4 21.Kh1 g3=)) 19...Qa4= 20.Na4 Kf7 21.Rc1 Rc8 22.Nf5 Rg6 23.Be5 Nfe8 24.Ne7 Ke7 25.Nc3 Ke6 26.Bg3 a6 (better is 26...h5=) 27.Rfd1+– Rd8 28.Ne4! de4? (28...Kd7+–) 29.Rd8 Rg7 (29...Ke7 30.Bc7 (30.Rc7?! Nc7 31.Rh8 Ne6+–) 30...Nc7 31.Rh8+– (31.Rc7?! Kd8 32.Rh7 b6+–)) 30.Bc7 (better is 30.Rc8 Rd7+–) 30...Nc7 31.Rc8 (31.Rd4!? Nb5 32.Re4 Kf5+–) 31...Nb5 32.a4 Nd6 33.R8c7 (33.R8c7 Rd7 34.f3+–) 1–0. Fournier,Frederic (1895) – Maupin Gervais (1760), FRA Ch (Team) N4 SaintJustEnChaussee–Se, 2006.

4.d3 Bf5

5.de4 Be4 6.Nc3 Nf6 7.Ne4 Ne4 8.Nf3 h6 (8...c5!? 9.e3 cb4 10.Bb5 Nc6=) 9.c4+/– Nf6 (9...dc4 10.Qc2 Qe7 11.Qc4+/–) 10.Bf6 (10.cd5 Qd5 11.Qd5 Nd5+/–) 10...gf6 (better is 10...Qf6!? 11.cd5 Bd6+=) 11.cd5 Nd7 (11...a5 12.Qa4 Qd7 13.b5 Qd5 14.Rd1+/–) 12.e3 Bd6 13.Be2 a6 (13...Nb6 14.Qd4+–) 14.0–0 Qe7 15.Nd4 c5?? (better is 15...Qe5 16.g3 0–0–0+–) 16.dc6 bc6 17.Nf5 Qf8 (17...Bh2 18.Kh2 Qe5 19.Ng3 Nb6+–) 18.Nd6 Ke7 19.Nf5 Kd8 20.Qa4 c5 21.Rad1 Ra7 22.Rd7! Rd7 23.Qc6 Rc7 (23...Qe7 24.Qa8 Kc7 25.Qa7 Kc6 26.Ne7 Re7 27.Qe7 Rb8 28.Rd1 Rd8 29.Rd8 cb4 30.ab4 Kb6 31.Rd6) 24.Rd1 Kc8 (24...Qd6 25.Rd6 Kc8 26.Qa8) 25.Qa8 1–0. marekt – Treaclebelly, chessworld.net, 2015.

5.de4 Be4 6.c4 Ne7 7.Nc3+/– Bg6 (7...a5!? 8.b5 Qd6+/–) 8.cd5+– Nd7 9.e4 c6 (9...f5 10.Nb5 a6 11.Nd4 fe4 12.Ne6+–) 10.Nf3 f6 (10...Bh5 11.Be2+–) 11.Nd4 c5 (11...cd5 12.ed5 Qb8+–) 12.Ne6 Qc8 (12...Qb8 13.d6 Nc6 14.Nb5 Bd6 15.Nd6 Ke7 16.Nc5 Nc5 17.bc5+–) 13.Nb5 Kf7 (13...Nd5 14.Qd5 Qc6 15.Nbc7 Ke7 16.Bb5 Qd5 17.ed5+–) 14.Nd6 Kg8 15.Nc8 Rc8 16.Qa4 Be8 17.Bb5 Nb6 18.Qa7 Bb5 19.Qb6 Bd3 20.Nc5 Bc4 21.Qe6 1–0. marekt – Treaclebelly, chessworld.net, 2015.

5.de4 Be4 6.c4 Nf6!? 7.cd5 Bd5 =.

5.de4 Be4 6.c4 Qg5 7.Nc3 Bg2 8.h4 Qg6 9.h5 Qg5 10.Bg2 Qg2 11.Qd5 Qd5 12.Nd5 Bd6?? (better is 12...Kd8+–) 13.Bg7 (13…c6 14.c5+–) 1–0. kamret (2190) – NightdesignerX, GameColony.com, 2003.

4.d3 Nf6

5.e3 (--> 3.e3 d5 4.a3 Nf6 5.d3).

5.de4 de4 6.Qd8 Kd8 7.c4 Nc6 (7...Be6 8.Nd2 Nbd7 9.Rd1=) 8.e3 Be6 (8...Be7 9.Nc3+=) 9.Nc3 (9.Nd2 Bf5+=) 9...Bd6 10.0–0–0 (better is 10.c5 Be5 11.Rd1 Kc8 12.f4 Bc3 13.Bc3=) 10...Ne5?? (better is 10...Kc8=) 11.c5+– Ke7 12.cd6 cd6 13.Nge2 (13.Kd2 Bb3 14.Rc1 Bc4+–) 13...Rac8? (13...Neg4 14.Rg1 Nf2 15.Rd4+/–) 14.Kb1 (better is 14.Nd4+–) 14...Nd5?? (better is 14...Neg4 15.Rg1 Nf2+/–) 15.Nd5+– Bd5 16.Rd5 Nc4 (16...Nd3 17.f3+–) 17.Ng3 Nd2 (17...Nb2 18.Kb2 Ke6+–) 18.Rd2 1–0. Fournier,Frederic – eavesdropping, Chess.com, 2013.

5.de4 de4 6.Qd8 Kd8 7.Nd2 Bf5 8.e3 c5 9.b5 b6 (better is 9...Nbd7!?=) 10.Bc4+/– Be6 11.Be6 fe6 12.Ne2 Bd6 13.Ng3 Bg3 14.hg3 (worse is 14.fg3 Nbd7=) 14...Rf8? (better is 14...a6+/–) 15.Bf6+– Rf6 16.Ne4 Rg6 17.Rh7 Ke7 18.Rd1 Nd7 19.c4 Nf6 20.Nf6 Kf6 21.Rd7 a6 22.ba6 Ra6 23.Rh4 (23.Rd3!? Ra4 24.Rc3 e5+–) 23...Ra3+/– 24.Ra7?? (better is 24.Rb7+/–) 24...Ra7–+ 0–1. Fournier,Frederic (1825) – talron, rated blitz game, 2002.

5.h3 c5 6.b5 Qa5 7.Bc3 (7.Qd2 Qd2 8.Nd2 ed3 9.cd3 Nbd7=) 7...Qb5–/+ 8.de4 d4 (8...de4 9.Bf6 gf6 10.Nc3+=) 9.e3= Qb6 (9...Qc6 10.ed4 Qe4 11.Qe2+=) 10.ed4 Ne4 11.Nf3 (11.Qe2 Qe6=) 11...Nc3 (11...Be7 12.Bd3 Nc3 13.Nc3 cd4 14.Nd4+=) 12.Nc3= cd4 13.Nd4 (13.Bb5 Bd7 14.Qd4 Qd4 15.Nd4 Nc6 16.Bc6 bc6+=) 13...Bc5 14.Qe2 Be6 (14...Kd8 15.Rb1 Qg6 16.Qd2+=) 15.Ne6= fe6 16.Nd5 (16.Ne4 Nd7 17.Nc5 Qc5 18.Qe6 Kf8 19.0–0–0 (worse is 19.Qd7 Qc3 20.Kd1 Qa1 21.Kd2 Qa3+=) 19...Qa3 20.Kb1 Qb4 21.Qb3 Qb3 22.cb3+=) 16...Bf2+= 17.Qf2 Qf2 18.Kf2 0–0 19.Ke3 (19.Kg3 ed5 20.Rd1 Rc8+=) 19...ed5 20.c4 (20.Rd1 Nc6 21.Rd5 Rae8 22.Kd2 Rf2 23.Kc3 Re3 24.Rd3 Re5+=) 20...Re8–/+ 21.Kd2 d4 22.c5 (22.Rb1 Re7–/+) 22...Nc6 (22...Nd7 23.Bc4 Kh8 24.Bb5–/+) 23.Bc4 Kh8 24.Bb5 (24.Rae1 Ne5 25.Bd5 Rac8–/+) 24...Re3 (24...Re5 25.Bc6 bc6 26.Rac1–/+) 25.Bc6 bc6 26.Rhe1 Rae8 (26...Rg3 27.Re6 Rc8 28.Rf1 Rg2 29.Kd3 Rg3 30.Kd4–/+) 27.Re3+= Re3 (27...de3 28.Kd3+=) 28.Rb1 (better is 28.Re1!?+=) 28...h6 29.a4 Ra3 (29...Rc3 30.Rb4–/+) 30.Rb4 (30.Rb8 Kh7+=) 30...Ra2 (30...Rc3 31.Rd4 Rc5 32.Kd3+=) 31.Kd3 Rg2 32.Kd4 (32.Rb8 Kh7 33.Ra8 Rg3 34.Kd4 Rh3 35.Ra7 h5+=) 32...Rd2 33.Ke4 Rd5 34.Rb8 (34.Rb5 Kh7 35.Ra5 Kg6+=) 34...Kh7–/+ 35.Rb7 (35.Rb5!–/+) 35...Rc5 36.Ra7 Rh5 37.Kd4 Rh3 38.Kc5 Rc3 39.Kb4 (39.Kd4 Rc1 40.a5 h5–+) 39...Rc1 40.a5 h5 41.a6? (41.Rd7–+) 41...c5 (better is 41...Ra1–+) 42.Kb5–/+ Kh6 (better is 42...h4!? 43.Re7 c4+=) 43.Rc7 Attacks the isolani on c5 43...Ra1 (43...Rb1 44.Kc5 Ra1 45.a7+/–) 44.a7+= h4?? (better is 44...g6+=) 45.Kc5 (better is 45.Rc6 Kh7 46.Ra6 Ra6 47.Ka6+–) 45...g5 (better is 45...h3 46.Kd6 h2–+) 46.Kb6+= h3 (46...Rb1 47.Ka6 Ra1 48.Kb7 Rb1 49.Kc8+=) 47.Rc8 g4 48.a8Q Ra8 49.Ra8 Kg5 50.Rh8 Kf4 51.Kc5 Kg3 52.Kd4 h2 53.Ke4 Kg2 ½–½. Vance,Laura – Dennis,Bruce, IECC, 1999.

5.h3 Bd6 6.de4 de4 7.e3+=.

5.de4 Ne4

6.Nd2 c5 7.Ne4+= cb4? (better is 7...de4!? 8.Qd8 Kd8 9.Rd1 Ke8=) 8.Ng3 (8.Nd2 ba3 9.Ba3 Ba3 10.Ra3 0–0+–) 8...ba3 9.Ba3 Ba3 10.Ra3 0–0 11.e3 Qb6 12.Ra1 Qb4 13.Qd2 Qb2 14.Rd1 Nc6 15.Nf3 (15.Qd5 Nb4 16.Qd2 Nc2 17.Ke2 Bg4 18.f3 Rfe8 19.fg4 Rad8–/+) 15...Be6 16.Be2 Rac8 17.0–0 Qf6 18.Nh5 Qe7 19.Nf4 Rfd8 20.Rb1 a6 21.Rb6 h6 22.Rfb1 Rd7 23.R1b2 g5 (23...Rcc7 24.Nd4+–) 24.Ne6 fe6 25.Nd4 Nd4 26.ed4 Rcc7 27.Bg4 Rd6 28.Qe2 Rb6 29.Rb6 Qf6 30.Qe6 (30.Re6 Qd4 31.Rg6 Kh7+–) 30...Qe6 31.Be6 (31.Re6 Rc2 32.Kf1 Rd2+–) 31...Kf8 32.Bd5 Rc2 Do you see the mate threat? 33.f3 Rd2 34.Bb7 Rd4 35.Ra6 h5 36.Ra5 Rd1 37.Kf2 Rd2 38.Kg3 Rd7 39.Rf5 (better is 39.Be4 h4 40.Kh3 Rg7+–) 39...Kg7 (39...Ke7 40.Be4 h4 41.Kh3+–) 40.Be4 Kh6 41.Rf6 Kg7 42.Rg6 Kf7 (42...Kf8 43.Rg5 Kf7 44.Rh5+–) 43.Rg5 Kf6 44.Rh5 Rg7 45.Kf2 Ra7 46.g4 Ra2 47.Kg3 Kg7 48.h4 Kf8 (48...Ra1 49.Rh7 Kf6 50.g5 Ke5 51.Rh8+–) 49.g5 Kg8 (49...Ke7+–) 50.Bd5 Kg7 51.Ba2 (51.Ba2 Kg6 52.Rh6 Kg7 53.h5+–) 1–0. Woschkat,Karl_Heinz – Rosek,Holger, DESC, 1999.

6.Nd2 Nd2 7.Qd2 Be6 8.Nf3 Nc6 9.e3 a5 10.b5 Ne7 11.Bd3 c6 12.bc6 Nc6 13.0–0 Bg4 14.Ne5 Ne5 15.Be5 f6 16.Bd4 Be7 17.f3 Be6 18.Rfc1 0–0 19.c4 dc4 20.Bc4 Bc4 21.Rc4 Rc8 (better is 21...b5!? 22.Rc3 Bd6+=) 22.Rc8+/– Qc8 23.Qa5 Qd7 24.Qc3 Rc8 25.Qb2 Bc5 26.Bc5 Rc5 27.Rc1 Re5 28.e4 b5 29.Qb3 Kh8 30.Qc3 Qa7 31.Kf1 (31.Kf1 h6 32.Qd3+/–) 1–0. Fournier,Frederic (1765) – pachalo (1795), Active (5/2) ajedrez21.com, 2005.

6.Nd2 Nd2 7.Qd2 Be6 8.Nf3 f6 9.Nd4 Bf7 10.e3 Nd7 11.Be2 Be7 12.Bh5 g6 13.Be2 0–0 14.0–0 c6 15.Rad1 Qc7 16.h3 Rad8 17.Bg4 f5 18.Be2 Bf6 19.Qd3 Bg7 20.Rfe1 c5 (20...Rfe8!?=) 21.Nb5+= Qb6 22.Bg7 Kg7 23.bc5 Nc5 24.Qd4 Kg8 25.a4 Rc8 (25...a6!? 26.a5 Qc6=) 26.a5+/– Qa5 27.Ra1 Qb6 28.Ra7 Qe6 (28...f4 29.Ra3+=) 29.Rea1+/– f4? (better is 29...Ne4 30.Bd3 Qe7+/–) 30.Bg4+– (30.Qf4?! Qe4+–) 30...Qe7 (30...Qc6 31.Bc8 fe3 32.fe3 Rc8 33.Ra8+–) 31.Bc8 Rc8 32.Qf4 Ne4 33.Nd4 g5 34.Qf5 Bg6 (34...Rf8+–) 35.Qc8 (35.Qc8 Qf8 36.Qf8 Kf8 37.Rb7+–) 1–0. b4_player (2255) – Jack_D (2085), GameColony.com, 2003.

6.Nd2 f5 7.Ne4 de4 8.Qd8 Kd8 9.Nh3 h6 10.0–0–0 Ke8 11.e3 Be6 12.Nf4 Bf7 13.Nd5 Bd5 14.Rd5 a5 15.ba5 (worse is 15.Ra5 Ra5 16.ba5 Rh7+/–) 15...c5 16.Bb5 Nc6 17.a6 Kf7 (17...Ra6 18.Ba6 ba6 19.Rf5 Be7+–) 18.ab7 (18.ab7 Rb8 19.Bc6+–) 1–0. usingprogram (2020) – bigvlad (1675), kurnik, 2012.

6.e3 c5 7.bc5 Qa5 8.Nd2 Nc5 =.

6.e3 c5 7.bc5 Qa5 8.Nd2 Nd7 9.Ne2 Ndc5 10.Nd4 Be7 (10...Nc3 11.Bc3 Qc3 12.Bb5 Nd7 13.Rb1=) 11.Bb5 Kf8 (11...Kd8 12.h3=) 12.Rb1 Bh4 (12...a6 13.Bd3=+) 13.Rf1 Nc3 14.Bc3 Qc3 15.Bd3 (15.Ne2 Qa3 16.Nf3 Bf6=+) 15...Bf6 16.Nb5 (16.Qf3 Nd3 17.cd3 Bd4–+) 16...Qa5 (16...Nd3 17.cd3 Qd3 18.Qf3=+) 17.Qf3= Be6 18.Qf4 a6 19.Nc7 Rc8 (< 19...Nd3 20.cd3 Rd8 21.Ne6 fe6 22.Rb7 Qa3 23.Ke2+=) 20.Ne6 fe6 21.Qb4 Bc3 22.Qa5 Ba5 23.Ke2 b5 24.Nb3 Bb6 25.Nc5 Bc5 26.Rb3 Ke7 27.Ra1 Bd6 28.f4 Rc6 29.a4 b4 30.g3 a5 31.e4= de4 32.Be4 Rc4 33.Bd3 Rc5 34.h4 g6 35.Be4 e5 36.f5 Rc4 37.Re3 Bc5 38.Bd3 Be3 39.Bc4 Bd4 40.Rf1 Rf8 41.Bd3 gf5 42.Rf5 Rf5 43.Bf5 ½–½. Krasny,Henryk Jan – Figiel,Rafal, corr or01–002 E–mail, 2001.

6.e3 c5 (6...Bf5 7.Nc3 Nc3 8.Bc3=) 7.bc5 Bc5 (7...Qa5!? 8.Nd2 Nc5=) 8.Bg7+= Rg8 9.Bd4 (9.Be5 Nc6 10.Bb2 Qb6=) 9...Nc6 10.c3 (10.Nf3 Nd4 11.Nd4 Qf6=) 10...Bd6 (10...Bg4 11.Qa4=) 11.Nf3+= Qe7 (11...Qa5 12.Qd3+=) 12.h3 Be6 13.Ra2 0–0–0 (13...Bf5 14.Rc2+=) 14.Qb3 (14.Rb2 Rde8+/–) 14...Kb8 (14...Nc5 15.Qc2+=) 15.Rb2 Rd7 (15...Nd4 16.cd4 Rc8 17.Kd1+/–) 16.g3 (16.Bb5 Nd4 17.cd4 Rc7=) 16...f6 (16...Nd4 17.cd4 Rc7 18.Rc2+=) 17.Bb5 (17.Bd3 Nc5 18.Bc5 Bc5+/–) 17...Ka8 (17...Nd4 18.cd4 Rc7 19.Rc2+/–) 18.Qa4 (18.Bd3 Nc5 19.Bc5 Bc5+/–) 18...Rc7 19.Bb6 (19.Kd1 Nd4 20.cd4 Rgc8–+) 19...Nc5 20.Bc5 Bc5 21.Nd4 Nd4 (21...Bd4 22.cd4 Nd4 23.Qd1 Nb5 24.Rb5–/+) 22.ed4 (22.cd4 Bd4 23.Rc2 Rc2 24.Qc2 Rc8+=) 22...Bd6 (22...Bg4 23.Kd2 Qe4 24.Rh2+– (24.hg4?! Qh1 25.dc5 Qf3+–; 24.dc5?! Qh1 25.hg4 Qf3+–)) 23.Re2+/– Qf7 24.Kd2 (24.Bd3 h6+=) 24...h5 25.h4 (25.Kd1 Bf5 26.Be8 Qh7+=) 25...Bg4 26.Re3 Bf5 (26...Re7 27.Rhe1+=) 27.Qb3 (27.Rhe1 Re7+=) 27...Rgc8 (27...a6 28.Bd3 Bd3 29.Kd3 Qg6 30.Ke2 Qg4 31.Kd2+/–) 28.Rhe1 Bf8 (28...Re7 29.Re7 Be7 30.Bd3 Bd3 31.Kd3+=) 29.Kc1 (29.Bd3!? Bd3 30.Kd3+/–) 29...Bh6= 30.f4 Bf8 (30...a6 31.Be8 Qg8 32.Bh5 Bb1 33.Kb1 Bf4 34.gf4 Qh7 35.Kc1 Qh5 36.Rh1=) 31.Nd2 (31.Be8 Qh7 32.Kd2 Be4+=) 31...Re7 (31...a6 32.Be8 Qh7 33.Kd1+/–) 32.Re7 (32.Kd1 Bg4 33.Nf3 Re3 34.Re3 Bd6+=) 32...Be7 33.Be2 (33.Kd1 Bg4 34.Be2 Qg6+=) 33...Qe6 (33...Qg6!? 34.Bf3 Rc7=) 34.Kd1+/– Bg4 35.Bf3 Exerts pressure on the isolated pawn (35.c4 dc4 36.Qc3 Bd6=) 35...Bf3 (35...Qd7 36.Re3+=) 36.Nf3+/– Qd7 37.Re3 (37.Re2 Rg8+=) 37...Kb8 (37...Rg8 38.Nd2+/–) 38.Ne1 (38.Re2 Rg8 39.Rg2 Rg4+=) 38...Rc4 39.Nc2 (39.Nf3 Rc8=) 39...Bd8 (39...Qg4 40.Kd2 Qd7 41.Nb4 Bb4 42.ab4+/–) 40.Nb4+/– Kc8 (40...Ba5 41.Na6 Kc8 42.Nc5 Qg4 43.Ke1+/–) 41.Kd2 (41.Nd3 Be7+/–) 41...a5 (41...Ba5 42.Re2+=) 42.Nd3 b6 (42...a4 43.Qd1 Ba5 44.Nb4 Bb4 45.ab4+– (45.cb4?! Rd4 46.Rd3 Rd3 47.Kd3 Qf5 48.Kd2 b5=)) 43.Nb2 (43.Qd1 Be7+/–) 43...Rc6 (43...a4 44.Qc2+–) 44.Nd1 (44.Nd3 Rc4 45.Qd1 Be7+/–) 44...Rd6 (44...Be7 45.Nf2+/–) 45.Qc2 (45.c4 a4 46.Qb5 dc4 47.Qc4 Kb8+/–) 45...Kc7 (45...Rc6 46.Nf2+/–) 46.Re1 (46.Qg6 Qg4 47.Qg4 hg4+–) 46...Qg4 47.Qh7 Kc6 (47...Kc8 48.f5+/–) 48.Qd3+– Kb7 (48...Kd7 49.Nf2 Qg7 50.Qf5 Kc7 51.Re3+–) 49.Nf2 Qg8 50.Rb1 (50.Kd1 Re6+–) 50...Bc7 51.Rb5 (51.Kd1 a4+–) 51...a4 52.Rb4 (52.Kd1 Rc6+–) 52...Qe8 53.Qf5 (53.Qc2 Re6 54.Qd1 Re3+/–) 53...Ka6 (53...Ka8 54.Kd1+–) 54.Nd3 (54.Qc2 Ka5+–) 54...Ka7 55.Nb2 b5 56.Qh7 (56.Kd1 Ba5 57.Nd3 Bb4 58.Nb4 Re6+=) 56...Rd7 57.Qd3 Rg7 58.Kc2 (58.Qb5 Qb5 59.Rb5 Rg3 60.Rd5 Rg2 61.Kc1 Bf4 62.Kb1 Rg1 63.Ka2 Rg2 64.Rh5 Bc1+–) 58...Qe4 (58...Bd6 59.Rb5 (59.Qb5 Qe4 60.Kc1 Qe1 61.Nd1 Bb4 62.Qa4 Kb8 63.Qb4 Rb7 64.Qd6 Rc7+–) 59...Rg3 60.Ra5 (60.Qg3?! Qe2 61.Kb1 Qb5+=) 60...Kb6 61.Qa6 (61.Qg3?! Qe2 62.Kb1 Ka5+=) 61...Kc7 62.Qa7 Kd8 63.Qb6 Ke7 64.Ra7 Ke6 65.f5 Kf5 66.Qd6 Qe4 67.Kc1 Rc3 68.Kd1 Qb1 69.Kd2 Qb2 70.Kd1 Rc1) 59.Rb5 (59.Qe4 de4 60.Rb5 Rg3 61.Na4 Rg2 62.Kd1 e3+–) 59...Qe1 (59...Qg2!? 60.Kb1 Rg3+/–) 60.Rb4+– (60.Na4 Rg3 61.Qd2 Qd2 62.Kd2 Bf4 63.Ke2 Re3 64.Kf2 Rh3+–; 60.Rd5 Rg3 61.Qg3 Qg3–+) 60...Ba5 (60...Rg3 61.Ra4 Kb8 62.Qb5 Kc8 63.Ra8 Bb8 64.Rb8 Kc7 65.Rb7 Kd8 66.Qd7) 61.Ra4 Kb6 62.Qd1 (better is 62.c4+–) 62...Qc3+/– 63.Kb1 Qe1 64.Qe1 Be1 65.Ra8 Rg3 66.Rh8 Bf2 67.Rh5 Kc6 68.Kc2 Bd4 69.Nd3 Rg2 70.Kd1 Bc3 71.Nb4 Bb4 72.ab4 Rg4 (better is 72...Rb2 73.Rh6 Kd7+/–) 73.Rf5= Rh4 74.Kd2 (better is 74.Rf6 Kb5 75.f5=) 74...Rh3 (better is 74...Rh2 75.Kd3 Kb5+=) 75.Rf6+/– Kb5 76.Rd6 Rh5 77.Kc3 ½–½. Baer,Werner – Bonetti,Shane, TT–06 TSC, 2003.

6.e3 Bf5 7.Nc3 Nc3 8.Bc3 =.

6.Nf3 c5 7.c4 dc4 8.Qd8 Kd8 9.b5 a6 10.ba6 Ra6 11.g3 b5 12.Ne5 Nd6 13.Rg1 Nd7 14.Nf3 b4 15.e4 c3 (15...Ne4?! 16.Bc4 ba3 17.Na3–/+).

6.Nf3 c5 7.c4 dc4 8.Qd8 Kd8 9.b5 a6 10.Ne5 Be6 11.ba6 Na6 12.e3 b5 13.f3? (better is 13.g4!? Bd5 14.Bg2=+) 13...Nd6 –/+.

6.Nf3 c6 7.Nc3 Nc3 8.Bc3 Nd7 9.e3 Nf6 10.Be2 Bd6 11.Bb2 0–0 12.0–0 Ne4 13.g3 (13.Qd4!? Nf6 14.c4+=) 13...Bh3 14.Re1 f5 15.c4 Bc7 (15...dc4!? 16.Bc4 Kh8=) 16.cd5+= cd5 17.Rc1 b6 (17...Bb6 18.Qb3+/–) 18.Qd4 Rf7 19.Red1 Rd7 20.Rc2 (20.Bb5 Re7 21.Bc6 Rb8+–) 20...Nf6 (20...Bg4 21.Kg2 a6 22.Rdc1+/–) 21.Rdc1 Rc8?? (21...Bg4 22.Qd1 d4 23.Bd4+–) 22.Ne5 (better is 22.Ng5 Bg4 23.Ne6+–) 22...Rd6?? (better is 22...Be5 23.Qe5 Rc2 24.Rc2 Kh8+–) 23.Nc6 Rc6 24.Rc6 (24.Rc6 f4 25.Ba6+–) 1–0. Fournier,Frederic – NN, jeu.europe–echecs.com, 2013.

6.Nf3 c6 7.Nbd2 Bf5 8.Ne4 Be4 9.Nd2 Bg6 10.c4 d4 11.Nf3 c5 12.bc5 Bc5 13.Bd4 Qa5 14.Qd2 Qd2 15.Kd2 Bd4 16.Nd4 0–0 17.e3 Na6 18.Bd3 Bd3 19.Kd3 Rfd8 20.Rab1 Nc5 21.Ke2 Ne4 22.Rb7 a6 23.Rc1 Rac8 24.Rb6 Nc5 25.Kf3 a5 26.Ke2 Ne4 27.Ra6 Rc5 28.f3 Nd6 29.Rc6 Rh5 30.c5 Nb7 31.Rc7 Nc5 32.R1c5 Rh2 33.Kf2 h6 34.Ra5 Rh1 35.Raa7 Rf8 36.a4 Ra1 37.a5 Ra2 38.Kg3 Ra3 39.e4 Ra4 40.Nf5 Rb4 41.Nd6 Rd4 42.Nf7 Rb4 43.Ne5 Rb5 44.Rg7 Kh8 45.Ng6# 1–0. kamret (2210) – saww (1680), GameColony.com, 2003.

6.Nf3 Nc6 7.e3 Bg4 8.Be2 Bf3 9.Bf3 Be7 (9...Qh4!? 10.0–0 0–0–0=) 10.Bg7 Rg8 11.Bb2 Ng5? (11...Bf6 12.Ra2 Bb2 13.Rb2+=) 12.g3 (better is 12.Bd5 Qd6 13.Nc3+–) 12...Nf3 13.Qf3 b6 (13...Rg6 14.Nc3 d4 15.0–0–0+–) 14.Nd2 a5 15.0–0 (better is 15.b5!? Na7 16.c4+–) 15...ab4+= 16.ab4 Ra1 17.Ra1 Nb4 18.c3 Nd3 19.Ba3 Ba3 20.Ra3 Ne5 21.Qe2 Qf6?? (21...Kf8 22.Qh5 Qd6 23.Ra4+=) 22.c4 (better is 22.Ra8!? Ke7 23.Rg8 Qc6+–) 22...dc4?? (better is 22...Qc6+=) 23.Ra8+– Ke7 24.Rg8 c3 25.Nb1 Nf3 26.Kg2 Nd2?? 27.Nd2+– c2 28.Nb3 Qc6 29.Kg1 c1Q 30.Nc1 Qc1 31.Kg2 Qc6 32.Qf3 Qf3 33.Kf3 f6 34.h3 Ke6 35.h4 c5 36.h5 c4 37.h6 1–0. Fournier,Frederic (1660) – teliquido (1645), Active, 2006.

6.Nf3 Be6 7.e3 Bd6 8.Nc3 Nc3 9.Bc3 0–0 10.Be2 Nc6 11.0–0 a6 12.Bb2 Re8 13.Rc1 b5 14.Bd3 Qd7 15.Qd2 Bf5 16.Bf5 Qf5 17.Nd4 Nd4 18.Qd4?? (better is 18.Bd4 a5 19.ba5=) 18...Be5–+ 19.Qd5 (19.Qd2 Bb2 20.Rcd1–+) 19...Rad8 (better is 19...Bh2 20.Kh2 Qd5–+) 20.Qc6?? (better is 20.Qc5 Rd5 21.Qc6+/-) 20...Bb2–+ 21.Rcd1 Rc8 22.Rd7 Bf6 (22...Ba3 23.Rb1 Qe5 24.h3–+) 23.Rc7 h6 24.c4 Rc7 25.Qc7 Rc8 26.Qb6 bc4 27.Qa6 c3 (better is 27...Bb2 28.Qa4 c3–+) 28.b5?? (28.Rc1–+) 28...c2 29.Rc1 Bb2 30.b6 (30.e4 Qd7 31.Rf1–+) 30...Bc1 31.b7 Rb8 (31...Rb8 32.Qc6 Ba3–+) 0–1. Fournier,Frederic (1680) – chichiserrate (1630), Active, 2006.

6.Nf3 Bf5 7.c4 c6 8.e3 Nd7 9.cd5 Ndf6 10.Nd4 Qd7 11.dc6+– bc6 12.f3 Ng5 13.h4 Nf3 14.gf3 Be7 15.Qc1 Rc8 16.e4 Be4 17.Bh3 Qd5 18.Bc8 Bf3 19.Nf3 Qf3 20.Rh3 Ng4 21.Rf3 (21.Rf3 Bh4 22.Ke2+–) 1–0. guest3672 – guest853, ICC, 2005.

6.Nf3 Bg4 7.e3 Nd7 (7...a5 8.b5=) 8.Be2 (better is 8.Qd5!? Nd6 9.Bd3+/-) 8...Ndf6= 9.0–0 Be7 10.h3 Bh5 (10...Be6 11.Nc3=) 11.Nbd2 (11.g4!? Bg6 12.g5+=) 11...0–0 12.Ne4 de4 13.Nd4 Be2 14.Qe2 c6 15.Rad1 Qc8 16.c4 Rd8 17.c5 b5 (17...b6 18.Nb3=) 18.Nc2 (18.f3!? a5 19.fe4 ab4 20.Nf5+/-) 18...a5= 19.Rd8 Qd8 20.Rd1 Qc7 21.Bc3 Nd5 22.Bb2 ab4 23.ab4 (23.Nb4 Qd7=) 23...Ra2+= 24.Rb1 Qa7 (24...Qd7+=) 25.Qe1 (better is 25.Qg4 Bf8 26.Qe4=) 25...Qa4-/+ 26.Qc1 Nb4 (better is 26...Bf6!? 27.Bf6 Qc2 (27...gf6?! 28.Rb2=; 27...Nf6?! 28.Qd1 Nd5 29.Nd4 Qd1 30.Rd1 Nb4 31.Nb5=) 28.Qc2 Rc2-/+) 27.Nb4+= Qb4 28.Bc3?? (better is 28.Bf6! Qc5 29.Be7 Qe7 30.Qc6=) 28...Qc5–+ 29.Qe1 Bh4 30.Rb2 Rb2 31.Bb2 Qc2 32.Bd4 c5 33.Qa1 Qf2 34.Kh1 h6 35.Qa8 Kh7 36.Qe4 g6 37.Bc5 Qe1 38.Kh2 Bg3 0–1. Fournier,Frederic (2015) – rpg (1975), Active (5/5) echecs21.com, 2004.

6.Nd2 Bf5

7.e3 Nd2 8.Qd2 Be7 9.Bg7+/– Rg8 10.Bb2 a6 11.Ne2 Nc6 12.Nd4 Nd4+/– 13.Bd4 Qd6 14.Bd3 Bd3+= 15.Qd3 0–0–0 16.Qf5 Qe6+= 17.Qe6 fe6 18.0–0 Kb8 19.c3 h5 20.a4 c6 21.Be5 Bd6 22.Bd6 Rd6 23.Rad1 Rdd8 24.f4 Rdf8 25.b5 cb5+= 26.ab5 ab5 27.Rb1 h4 28.Rb5+/– Rc8 29.Rf2 Rc3= 30.Rfb2 Rg7 31.R2b3 Rc1–/+ 32.Kf2 Rc2 33.Kf3 Rcg2?? 34.Rb7+/– Rb7? 35.Rb7+– Kb7 36.Kg2 Kc7 37.Kf2 Kd7? 38.Ke2 Ke7 39.Kd3 Kf6 40.Kd4 Kf5 41.h3 Kf6 42.e4 de4 43.Ke4 Kg6 44.Ke5 Kf7 45.Kd6?? Kf6–+ 46.Kc5 Kf5 47.Kd6 Kf4 48.Ke6 Kg3 49.Kf5 Kh3 50.Kg5 Kg3 51.Kh5 h3 52.Kg5 h2 53.Kf5 h1Q 54.Kg5 Qf3 55.Kh6 Qg4 56.Kh7 Kh4 57.Kh6 Qg5 58.Kh7 Kh5 59.Kh8 Qf6 60.Kh7 Qf7 61.Kh8 Qf6 62.Kh7 Qf7 63.Kh8 Qe7 64.Kg8 Kg6 65.Kh8 Qg7# (65...Qd8#) 0–1. ajeffries (2055) – iboyd (2145), net–chess.com, 2009.

6.Nd2 Nf6

7.e3 a5 8.b5 Nbd7 9.Ngf3 Bc5 10.c4 0–0 11.cd5 Nd5 12.Ne4 N5f6 13.Bf6 gf6 14.Nc5 Nc5 15.Qc2 b6 16.Rd1 Qe7 17.Nd4 Bb7 18.Be2 Rad8 19.0–0 Rfe8 20.Bc4 Qe4 21.Qe4 ½–½. Fournier,Frederic (2490) – Neurosurgeon (2475), chess.com, 2010.

7.e3 c6 8.Bd3 Bd6 9.c4 dc4 10.Nc4 0–0?? (better is 10...Bc7+=) 11.Nd6+– Qd6 (11...Qe7+–) 12.Bh7! Nh7 (12...Kh7 13.Qd6) 13.Qd6 Be6 14.Qe5 Nf6 15.Qc7 Nbd7 16.Qb7 Bd5 17.Nf3 Rfb8 (17...Rfc8 18.Rd1+–) 18.Qa6 Rb6 19.Qa5 Rb5 20.Qc7 a5 21.Nd4 Rbb8 22.Nc6 Rc8 (22...Bc6 23.Qc6 ab4 24.ab4 Ra1 25.Ba1 Rb4+–) 23.Ne7 (23...Kh7 24.Qg3+–) 1–0. mrkt (1930) – T_Time (1675), ICC, 2003.

4.e3

4.e3 (--> 3.e3 d5 4.a3).

4.e3 c6 5.c4 Nf6 (--> 3.e3 d5 4.a3 Nf6 5.c4 c6).

4.e3 Nf6 5.d3 (--> 3.e3 d5 4.a3 Nf6 5.d3).

3.a3 f5

4.e3 d6 5.Qh5 g6 6.Bb5 c6 7.Qh3 cb5?? 8.Bh8+– Nc6 9.Qh7 Nf6?? 10.Qg6 Ke7 11.Bf6 Ke6 12.Bd8 Kd7 13.Bg5 d5 14.Qf5 Kd6 15.Qf8 (15.Qf8 Kc7 16.Nc3+–) 1–0. pereira – guest, internet, 2007.

4.Nh3 Nf6 5.Nc3 (5.e3 Be7=) 5...a5 6.b5 d5 7.e3 Bc5 8.Be2 0–0 9.Nf4 Qe7 (better is 9...g5 10.Nh3 h6=) 10.Ncd5+/– Nd5 11.Nd5 Qd7? (better is 11...Qg5!? 12.Bc4 Kh8+–) 12.Bc4+– Kh8 13.Qh5 Bd6 14.d3 (better is 14.Qg5+–) 14...Qf7?? (better is 14...ed3 15.cd3 f4+–) 15.Qf7 Rf7 16.Nb6! cb6 17.Bf7 Nd7 18.Rd1 (18.0–0–0 Be7+–) 18...Ne5 (18...ed3 19.Rd3 Be7 20.Rd5+–) 19.Be5 Be5 20.de4 Bc7 (20...g6 21.Bd5+–) 21.e5! g6 22.f4 Kg7 23.Bd5 Rb8 24.c4 Bd6 25.ed6 Bd7 26.Ke2 Re8 27.Bb7 h6 28.Bc6 g5 29.Bd7 Re3 30.Ke3 1–0. fajgo – powerPhil, internet, 2002.

4.c4 Nf6

5.Nc3 a5 6.Nd5 Nd5 7.cd5 ab4 8.ab4 =.

5.Nc3 Be7 6.d3 a5 7.b5 ed3 (7...d6 8.Qc2= (8.e3=)) 8.e3+= 0–0 9.Bd3 d6 10.Qc2 Ng4 11.Nd5 c6 12.Ne7 Qe7 13.Ne2 Ne5 14.0–0 Be6 15.Nd4 Qf7 16.Ne6 Qe6 17.Qc3 Rf7 18.Rad1 Nbd7 19.Be2 Nc5 20.Qd4 Rd7 21.f4 (21.Rb1 Nb3 22.Qc3 Nc5+=) 21...Ng6= 22.Bf3 Nh4 23.bc6 (23.Bh5!?=) 23...Nf3–/+ 24.Rf3 bc6 ½–½. Marshall,Frank James – Reshevsky,Samuel, New York, 1934.

5.Nc3 Be7 6.e3 0–0 7.d3 d6 (7...a5!? 8.b5 c6=) 8.de4+= fe4 9.Nge2 (9.Ne4 Ne4 10.Qd5 Kh8 11.Qe4 Nc6+=) 9...Bg4 (9...c6 10.Qd4 d5 11.cd5 cd5 12.b5+=) 10.Qc2 Nc6 11.Ng3 Now all is on e4 11...Ne5 12.Nge4 Ne4 13.Ne4 Bf5 14.Be5 de5 15.Bd3 Qc8 16.Ng3 Bd3 17.Qd3 c6 18.c5 Qg4 19.0–0 Rad8 20.Qc3 e4 (better is 20...Qe6+/-) 21.Rad1?? (21.Qc4 Kh8 22.Ne4+–) 21...h5 (better is 21...Rd1 22.Qb3 Rd5–+) 22.h3 (22.Qc4 Kh8 23.Rd8 Rd8+–) 22...Qg6? (better is 22...Qd1!? 23.Rd1 Rd1 24.Nf1 Rd3+/-) 23.Qe5 Bf6 24.Qe4 Qe4 25.Ne4 Bb2 26.a4 Ba3 27.b5 Rd1 28.Rd1 cb5 29.ab5 Re8 (29...Re8 30.f3 Rc8+–). Fournier,Frederic (1605) – OCHObre (1760), Active, 2007.

5.Nh3 Be7 6.e3 0–0 7.Nc3 Nc6 8.d4 ed3 9.Nf4 a5 10.b5 Ne5 11.Bd3 c6 12.0–0 g5 13.Nfe2 Nfg4 14.Nd4 Qc7 15.Be2 Nd3 16.Bg4 Nb2 17.Qb3 fg4 18.Qb2 Bd6 19.f4 gf3 20.Nf3 Be7 21.Nd4 d6 22.Rf8 Bf8 23.Qf2 Bg7 24.Rf1 Kh8 25.Qc2 Bd4 26.ed4 Be6 27.Qd3 Qg7 28.d5 cd5 29.cd5 Bf7 30.b6 Bg6 31.Qd2 Kg8 32.Nb5 Rf8 33.Re1 Re8 34.Rd1 Re5 35.Nc7 Bh5 36.Rf1 Re2 37.Qa5 Qd4 38.Kh1 Qd3 39.Kg1 Qd4= 40.Kh1 Qd3 41.Kg1 ½–½. slogger – Agove, ChessWorld.net, 2007.

4.e3 d5

5.c4 c6 6.cd5 cd5 7.Nh3 Nf6 8.Bf6 Qf6 9.Nc3 Be6 10.Nb5 Qe5 11.Ng5 Bd6?? 12.f4+– ef3 13.Nf3 (13.Nf3 Qf6 14.Nd6 Ke7 15.Nb7+–; 13.Nd6?! Qd6 14.Qf3 Bd7 15.Qh5 g6+=) 1–0. pierre (2080) – ranzpendang, internet, 2007.

5.c4 Be6 6.cd5 Bd5 7.Nc3 Be6 8.d3 ed3 9.Qd3 Qd3 10.Bd3 Nf6 (10...Nc6 11.Nf3+=) 11.Nf3 a6 (11...c5 12.Nb5 Na6 13.Bf6 gf6 14.bc5 Bc5 15.Nbd4 Bd4 16.Nd4+/-) 12.Nd4+– Bd5? (better is 12...Kf7!?+–) 13.Nd5 Nd5 14.Bf5 c5 15.bc5 Bc5 (15...Nd7 16.e4 Nf4 17.Bd7 Kd7 18.Rd1+–) 16.Be4 (better is 16.Ne6 Ne7 17.Be4 Bb6 18.Bg7 Rg8 19.Bh7 Kf7 20.Bg8 Ng8+–) 16...Nf6 17.Bb7 0–0 (17...Ra7 18.Bf3 Nbd7+–) 18.Ba8 Nbd7 19.Bf3 1–0. Fournier,Frederic (1625) – Celamo (1745), Active, 2006.

4.e3 Nf6

5.d3 d5 6.Nh3 Bd6 7.d4 0–0=+ 8.Nc3 c6 9.Ne2 h6 10.Nhf4 Qe8 11.c3 g5 12.Nh3 Ng4 13.g3 Be6 14.Bg2 Nd7. narendras – ranzpendang, internet, 2007.

5.d3 Be7 6.Nd2 ed3 7.Bd3 0–0 8.Ngf3 d5 9.0–0 Ne4 10.Qe2 c6 11.Rfd1 (11.c4 Bf6 12.Nd4 b6+=) 11...Bd6 (11...Bf6 12.Nd4+=) 12.h3 Nd7 13.c4 Ng5 14.cd5 Nf3 15.Nf3 (worse is 15.gf3 Qg5 16.Kf1 cd5+=) 15...Ne5?? (better is 15...cd5 16.Qc2 Nb6+/-) 16.Ne5+– Be5 17.Be5 Qe7 (17...cd5 18.Bc4! Be6 19.Qf3+–) 18.Bf4 (better is 18.Bd4!? Re8 19.dc6 bc6+–) 18...cd5 19.Bc2 Be6 20.Bb3 Kh8 21.Bd5 Bd5 22.Rd5 Rad8 23.Rad1 Rd5 24.Rd5 Rd8 (24...a6 25.Qd3 Qf6 26.Be5+–) 25.Qd3 Rd5 26.Qd5 h6 27.Qd6 (better is 27.Qf5 Kg8 28.e4+–) 27...Qe4 (27...Qd6 28.Bd6 Kg8+–) 28.Be5 Qb1 29.Kh2 Qe4 (29...Kh7 30.Qe7 Qh1 31.Kh1 Kg6 32.Qg7 Kh5 33.g4 fg4 34.Qg4) 30.Qf8 Kh7 31.Qg7 1–0. Fournier,Frederic – jaky, Active, 2008.

4.f3 Nf6

5.Nc3 d5 6.fe4 fe4 7.e3 c6 8.Nge2 Bg4 9.h3 Bh5 10.g4 Bg6 11.Nf4= Qd6 12.Qe2 Bf7 13.Bg2 g5=+ 14.Nh5 Nh5 15.Rg1?? Nf6–+ 16.0–0–0 Nbd7 17.Rdf1 Bg7 18.Qf2 0–0–0 19.Qf5 h6 20.Na4 b6 21.Bf6 Qf6 22.Qf6 Bf6 23.Nc3 Bg6 24.Ne2 Be5 25.c3 Rhf8 26.Kc2 Rf1 27.Rf1 Rf8 28.Nd4 Rf1 29.Bf1 Bd4 30.cd4 Kc7 31.Kc3 Kd6 32.Be2 Nf6 33.Bd1 h5 34.gh5 Bh5 35.Bh5 Nh5 36.Kc2 Ng3 37.Kd1 c5 38.dc5 bc5 39.bc5 Kc5 40.Kc2 Nh1 41.d3 ed3 42.Kd3 Nf2 43.Ke2 Nh3 44.Kf3 Kc4 45.Kg3 Kd3 (45...Kd3 46.Kf3 g4 47.Kg4 Ke3 48.Kh3 d4–+) 0–1. goodlookingginger – retiarius, ChessWorld.net, 2009.

5.fe4 fe4 6.d3 ed3 7.ed3 d5 8.Nf3 Bd6 9.Be2 Ng4 10.0–0? (better is 10.Qd2=) 10...Ne3–+ 11.Qe1 0–0 (better is 11...Qe7!? 12.Nc3 Nc2 (12...Nf1 13.Nd5 Qe6 14.Ng5 Bh2 15.Kh1 Ng3 16.Kh2 Qd5 17.Bf3 Ne4 18.Ne4+–) 13.Nd5 Ne1 14.Ne7 Nf3 15.Bf3 Be7 16.Bg7 Rg8–+) 12.Qc3 Qe7 13.Re1 Nc6 (13...Nc2 14.Qc2 Rf3 15.Qc3 Bh2 16.Kh2 Qh4 17.Kg1 Qf2 18.Kh1=) 14.Nbd2 Bg4 (14...d4 15.Qb3 (15.Nd4? Bh2 16.Kh1 Qg5–+) 15...Be6 16.c4 dc3 17.Qc3+=) 15.h3 Bh5 16.Bf1 (16.b5 Nd8=) 16...Bf3 17.Nf3 Rf7 18.Qd2 Bf4 19.Qf2 Re8 20.Re2 Qd6 21.Rae1? (better is 21.Kh1!?-/+) 21...d4 (better is 21...Bg3 22.Re3 Bf2 23.Kf2 Re3 24.Re3 d4–+) 22.c3?? (better is 22.Bd4 Nd4 23.Re3–+) 22...Bg3 23.Re3 (23.Qe3 de3 24.Re3 Ne5–+) 23...de3 (better is 23...Bf2 24.Kf2 Re3 25.cd4 Re1 26.Ke1 Nb4–+) 24.Qg3 (24.Qe3 Re3 25.Re3–+) 24...Qg3 25.c4 Rf3 26.Kh1 (26.Be5 Qe1 27.Bd4 Rf1 28.Kh2 Rh1) 26...Rf1! 27.Rf1. Fournier,Frederic – Guest3849333, Partie amicale, 2m + 1s, 2008.

3.a3 f6

4.e3 Nc6 5.Bc4 (5.Qh5 g6 6.Qd5 Bg7 7.Qe4 Nge7+/–) 5...g6 (5...Nge7 6.Qh5 g6 7.Qh4+/–) 6.Nc3 Ne5 (6...Bg7 7.Bg8 (worse is 7.Ne4 d5–/+) 7...Rg8 8.Ne4+=) 7.Bb3+/– c6 (7...a5 8.Ne4 d5 9.Nc3 ab4 10.ab4 Ra1 11.Qa1+/–) 8.Ne4 Nh6? (better is 8...d5!? 9.d4 Nd7+/–) 9.d4 (9.f4 Neg4 10.h3 d5+–) 9...Neg4 (9...Nc4 10.Bc4 d5 11.Bd3 de4 12.Be4+–) 10.h3 Ne3 (10...Qe7 11.Ng3 (11.hg4?! Qe4 12.Qf3 Qf3 13.gf3 Nf7+–) 11...Ne3 12.fe3+–) 11.fe3 Qe7 (11...d5 12.Nd2+–) 12.Qf3 Bg7 (12...f5 13.Nd2+–) 13.d5 cd5 (13...f5 14.Nd6! Kf8 15.Bg7 Kg7+–) 14.Nf6 Bf6 (14...Kd8 15.Nd5 (15.Bd5?! Rf8+–) 15...Bb2 16.Ne7 Ba1 17.Nd5+–) 15.Bf6 (15.Bf6 Qf8 16.Bd5+–) 1–0. Wall,Bill – SilverFox, internet, 2003.

4.e3 Ne7 5.Bc4 d5= 6.Bb3 Nbc6 7.Ne2 Bg4 8.Nbc3 b5 9.Nb5 a6 10.h3?? ab5?? 11.hg4+/– f5? 12.gf5+– Nf5 13.Nf4 h6 14.Ng6 Rg8 15.Qh5 Nce7 16.Ne5 g6 17.Ng6?? Kd7?? 18.Ne5 Kc8 19.Nf7 Qd7 20.Ne5?? Qd6?? 21.Nf7?? Qg6?? 22.Qg6 Rg6 23.g3 Kb7 24.Ke2 Nc6?? 25.a4 Bb4 26.c3 Ba5 27.Rh5 Ng3 28.fg3 Rg3 29.Bd5 Ka6 30.Bc6 Rf8 31.ab5 Kb6 32.Nh6 Rg2 33.Kd1 Rf1 34.Kc2 Rf6 35.Be4 Rg3 36.Rd5 Rh6 37.c4 c6 38.bc6 Rc6 39.Rda5 Rc4 40.Kb3 Re4 41.Bd4! Kc6?? 42.Rc5 Kd6 43.Ra6 Kd7 44.Rh5 Rd4 45.Rh7 Kc8 46.Ra8# 1–0. pieeater – wee harv, ChessWorld.net, 2011.

4.e3 h5 5.Bc4 (5.d3 d5+/–) 5...d6 (5...d5 6.Be2 h4 7.Bh5 Ke7 8.Nc3+=) 6.Nc3 (6.Bg8 d5+/–) 6...Bg4 (6...Ne7 7.Be2+/– (7.Ne4?! d5=)) 7.Nge2+/– Nc6 (7...c6 8.h3 (worse is 8.Ne4 d5+=) 8...Bc8 9.Bg8 (worse is 9.Ne4 d5+=) 9...Rg8 10.Ne4+/–) 8.0–0 (8.h3 Bc8+/–) 8...Qd7 (better is 8...Nge7+/–) 9.Ne4?? (9.Bd5 f5+/–) 9...0–0–0?? (better is 9...d5 10.Bd5 Qd5–/+) 10.b5 (10.N4c3 Ne5 11.Bb3 d5 12.Bd5 Ne7+/–) 10...Nce7 (10...Na5 11.Bd3+/–) 11.f3 (11.d4 d5 12.Nc5 Qf5+/–) 11...Be6 (better is 11...d5!? 12.fg4 dc4+=) 12.Be6+– Qe6 13.Nd4 Qd7 (13...Qf7 14.c4!+–) 14.c4 f5 15.Ng5 Qe8? (better is 15...Re8+–) 16.Nde6 Rd7 (16...Rh6 17.Qa4 (worse is 17.Nd8 Kd8 18.Qa4 Nc8+–) 17...a6 18.Bg7 Bg7 19.Ng7+–) 17.Qa4 (17.Bg7?! Bg7 18.Ng7 Qg6+–) 17...Kb8 18.b6 (18.Bg7?! Bg7 19.Ng7 Qg6+–) 18...ab6 (18...Nc6 19.bc7 Kc8+–) 19.Nf8 Qf8 (19...Nc6 20.Nd7 Qd7 21.f4+–) 20.Qd7 (20.Qd7 Nf6 21.Bf6 Qf6 22.Ne6+–) 1–0. Wall,Bill – Laprade,Maria, Palm Bay, FL, 2004.

4.e3 Nh6 5.Qh5 Nf7 6.Nc3 d5 7.Qd5 Bd6? (better is 7...Qd5!? 8.Nd5 Bd6+/–) 8.Qe4 Kf8 9.Nb5 Bd7 10.d4 (10.Qb7?! Bc6 11.Nd4 Bb7 12.Ne6 Ke7 13.Nd8 Rd8=+; 10.Nd6?! Nd6 11.Qh4 Nc6+–) 10...c6 11.Nd6 Nd6 12.Qh4 Qe7 13.Bd3 Nf5 14.Qf4 Nh6 15.Nf3 Be6 16.Ng5 Bg8 17.0–0 Nd7 18.c4 Ke8 19.Ne4 Nf7 20.Bc3 g5 21.Qg3 h6 22.Rad1 f5 23.Nd2 Bh7 24.Rfe1 Rg8 25.e4 f4 26.Qg4 Nf6 27.Qf3 Bg6 28.e5 Ng4 29.Bg6 Rg6 30.Qg4 h5 31.Qh5 Kd7 32.e6 Kc7 33.ef7 Qe1 34.Re1 Re6 35.Re6 Rh8 36.Qh8 Kb6 37.d5 Ka6 38.Qc8 1–0. undacovabrotha – COUNTDOWN2MATE3, Live Game Caissa's Web, 2004.

4.e3 d5

5.d3=.

5.Be2 a6 6.Nc3 Nc6 7.d3 ed3 8.Bd3+= d4 9.ed4+/– Nd4 10.Nf3 Nf3 11.Qf3+/– Ne7 12.0–0 g6? 13.Rae1 Bh6 14.Nd5 Rf8 15.Nf6 Rf6 16.Qf6 Bf8 17.Rd1 c5 18.Rfe1 Qc7 19.Bc4 (19.Bc4 Qd6 20.Bf7 Kd8 21.Qd6 Bd7 22.Qd7#; 19.Bg6 hg6 20.Qg6#) 1–0. pieeater – wee harv, ChessWorld.net, 2011.

3.b5 a6

4.a4 d5 5.e3 Bd7 6.c4 ab5 7.ab5 Nf6?? (better is 7...Ra1 8.Ba1 dc4+=) 8.Ra8+– c6 (8...dc4 9.Bf6 gf6 10.Bc4 Bd6+–) 9.Be5 1–0. Taulien,Hans_Juergen (2350) – Seethaler,Franz (1945), remoteschach.de, 2003.

4.a4 Qg5 5.e3 ab5 6.ab5 Ra1 7.Ba1 Ne7 8.c4 d5 9.Qc2 c6 10.g3 Nd7 11.f4 ef3 12.Nf3 Qg4 13.Kf2 dc4 14.Qc4 Qf5 15.Bd3 Qb5 16.Qb5 cb5 17.Bb5 Nd5? (17...Nf5 18.Rc1 Kd8 19.Ng5+=) 18.Nc3 (better is 18.Rc1!? Ne7 19.Ne5+–) 18...Nc3 19.Bc3 f6 20.d4 Bd6 21.Ra1 0–0 22.Nd2 Nb6 23.e4 f5 24.e5 f4?? (better is 24...Be7+/-) 25.ed6+– fg3 26.Kg3 Nd5 (26...Rf5 27.Bc4 Kf8 28.Bb3+–) 27.Bc4 Be6 28.Bd5 (28.Bd5 Bd5 29.Ra5+–) 1–0. Fournier,Frederic – Chalvet,Philippe, Partie Libre (Active), 1995.

4.e3 Nf6 5.c4 Be7 6.Qb3 0–0 7.Be2 ab5–/+ 8.cb5 d5 9.d4 Be6 10.a4 c6 11.Nc3 cb5 12.Qb5 Ra7 13.f3 Nc6–/+ 14.Bd1 Bb4 15.Qe2 Qa5 16.Qd2 Rc8 17.Nge2 h6 18.0–0 ef3 19.Rf3 Bg4 20.Rf1?? Be2–+ 21.Qe2 Bc3 22.Rb1 Bb2 23.Rb2 Re8 24.Qf2 Qc3 25.Re2 Qd3 26.Bc2 Qa3 27.h3 Na5 28.Qf3 Nc4 29.e4 de4 30.Qa3 Na3 31.Bb3 b5 32.Ra1 Nc4 33.Rc2 Ne3 34.Rc5 ba4 35.Ra4 Ra4 36.Ba4 Rd8 37.Kf2 Rd4 38.Ke3 Ra4 39.Kd2 Ra2 40.Ke1 Rg2 41.Rc3 g5 42.Re3 h5 43.Kf1 Rb2 44.Rg3 g4 45.hg4 hg4 46.Re3 Kg7 47.Kg1 Kg6 48.Kf1 Kg5 49.Rc3 Kf4 50.Ke1 g3 51.Kf1 e3 52.Rc1 Kf3 53.Re1 Ng4 54.Kg1 Rf2 55.Kh1 g2 56.Kg1 e2 (56...e2 57.Rc1 Rf1 58.Rf1 gf1Q#) 0–1. campocebe – verns2, internet, 2010.

4.a4 Nf6

5.e3 Be7 6.c4 0–0 7.d3 ab5 8.ab5 Ra1 9.Ba1 c6 10.Nc3 (10.Bf6!? Bf6 11.de4+= d6 12.Nf3 Bg4 13.Nbd2 Nd7 14.Be2+=) 10...Bb4+= (10...d5 11.cd5 Bb4 12.dc6 bc6 13.bc6 Qa5 14.Qc1–+) 11.Qa4 (11.de4? Ne4 12.Nge2 Qf6–+) 11...Bc3 (11...c5!?+= 12.d4 d6 13.Bb2 Nbd7 14.Qb3+=) 12.Bc3= d5 13.g3 (13.bc6 Nc6 14.Qa1=) 13...Re8 (13...Bf5 14.d4+=) 14.Bf6 (14.c5+=) 14...Qf6 (14...gf6?! 15.cd5 ed3 A) 16.bc6 Qd5 17.c7 Nc6–+; B) 16.Bd3?? Qd5 17.Nf3 Qd3–+ (worse is 17...Qf3 18.Rf1–+); C) 16.dc6=) 15.d4 Nd7 (15...dc4 16.Bc4 Rd8 17.Ne2+=) 16.c5= Nf8 17.Bg2 Nd7 18.b6?? (18.Ne2 Nf8=) 18...Nf8?? (18...Nc5 19.dc5 Qc3 20.Kd1 Bg4 21.Ne2 Qd3 22.Kc1 Be2 23.h3–+) 19.Qa8?? (19.Ne2 Rd8=) 19...Qe7?? (better is 19...Bh3! 20.Qe8 Bg2–/+) 20.Qa7= Ng6 21.Ne2 Bg4 22.Nc3 h6 23.0–0 Nf8 24.Ra1 Nh7 25.Na2 Ng5 26.Nc1 Qd7 27.Nb3 Nf3 28.Kf1 (better is 28.Kh1=) 28...Nh2–/+ 29.Ke1 Nf3 30.Kf1 g5 (30...Bh3!?–/+) 31.Na5+= Re7 32.Qb8 Kg7 33.Nb3 h5 (better is 33...Re8!? 34.Qd6 Qf5=) 34.Ra8+/– Kf6?? (better is 34...f6+/–) 35.Qh8+– Ke6 36.Bf3 Bf3 (36...f6 37.Bg4 hg4+–) 37.Qe5 1–0. Trkn – santiago, itsyourturn.com, 2000.

5.e3 Be7 6.c4 0–0 7.d3 ab5 8.ab5 Ra1 9.Ba1 d5 A) 10.cd5 Qd5 11.Nc3 Bb4 12.de4 Qc5 13.Qc2 Ne4 14.Qe4–/+; B) 10.Nc3 Bb4 (10...dc4 11.de4 Qd1 12.Kd1 Rd8 13.Kc2 Ng4 14.Nh3=) 11.Qb3 c5 12.d4 Be6 13.dc5 Qa5 14.Bb2–+; C) 10.de4 de4 11.Qd8 Rd8 12.Ne2 Nbd7 13.Ng3 Nc5 14.Bd4+=; D) 10.Nd2 D1) 10...ed3 11.Bd3 (11.Bf6 Bf6 12.Bd3 dc4 13.Bc4 Bf5 14.Ne2+=) 11...dc4 12.Nc4 Bb4 13.Ke2 Bg4 14.Nf3+=; D2) 10...Nbd7 11.cd5 ed3 12.Qf3 Re8 13.Bd3 Bb4 14.Qe2+=; E) 10.Bf6 Bf6 11.Qc2+= Bf5 12.Nd2 ed3 13.Bd3 Bd3 14.Qd3+=.

4.e3 ab5

5.Bb5 c6 6.Bc4 d5 7.Bb3 Qg5 8.Kf1 Nf6 9.h4 Qf5 10.Nh3 (10.Ne2 Ng4 11.Nf4 Bd6–/+) 10...Bd6 11.Nc3 0–0 (better is 11...Nbd7–/+) 12.Na4? (better is 12.Ne2!?–/+) 12...Nbd7–+ 13.Kg1 Rd8 (better is 13...h6 14.Nc3–+) 14.Qe2? (better is 14.Nc3–+) 14...b5 15.Nc3 Ne5 (15...b4 16.Nd1–+) 16.a4 (16.Nf4–+) 16...b4 17.Nd1 (17.Nb5 cb5 18.ab5 Nf3 19.Kf1 Nh2 20.Kg1 Ra1 21.Ba1–+) 17...Ba6 18.d3 ed3 19.cd3 Bd3 20.e4 (20.Qe1 Nf3! 21.gf3 Qf3 22.Nf4 Bf4 23.ef4–+) 20...Ne4 21.Ne3 Qh3 (21...Qh3 22.Rh3 Be2–+) 0–1. zd3nik (1905) – gambit_queen (1965), gameknot.com, 2014.

5.Bb5 Qg5 6.Bf1 d5 7.h4 Qg6 8.Nh3 Bg4 9.Be2? Be2–+ 10.Ke2 Qg2 11.Qg1 Qf3 12.Ke1 f6 13.Nf4=+ Nh6 14.Rh3 Qg4 15.Qg4 Ng4 16.Nc3? c6–/+ 17.Ne6 Na6 18.Nd4 Kf7 19.Nf5? g6 20.Ng3 Nb4 21.Rc1 Ne5 22.a3 Nbd3! 23.cd3 Nd3 24.Kd1 Nf2 25.Kc2 Nh3 26.Nce2 Nf2 27.Rf1 Nd3 28.Bf6 Bg7 29.Bg5 Ke6 30.Nd4 Bd4 31.ed4 Rhf8 32.Rg1 Ra3 (32...Ra3 33.Rb1 Rf3–+) 0–1. mic (2200) – pblanctranchant (2230), net–chess.com, 2008.

3.b5 Nf6

4.a4 d5 5.e3 (--> 1.b4 e5 2.Bb2 e4 3.e3 Nf6 4.b5 d5 5.a4).

4.Nc3 d5 5.e3 (--> 1.b4 e5 2.Bb2 e4 3.e3 Nf6 4.b5 d5 5.Nc3).

4.c4 Bc5 5.e3 d6 6.a4 (6.Bf6 Qf6 7.Nc3 Qe5=) 6...a6 (6...Bb4 7.Bc3 Bc3 8.Nc3+=) 7.Nc3 (7.Bf6 Qf6 8.Nc3 Qg6+=) 7...0–0 8.d3 Bf5 (8...Bb4 9.Qb3 Ba5 10.f3+=) 9.de4 Ne4 10.Ne4 Be4 11.Qb3 (11.Qg4 Bg6+=) 11...f6 (11...ab5 12.cb5 Bb6 13.Kd1+=) 12.Ne2 d5 (12...Nd7!?+=) 13.Ng3 (13.Nc3 Bg6 14.cd5 Bd6+/–) 13...b6 (13...c6 14.Rd1 Qb6 15.Bc3 ab5 16.Ne4 de4 17.cb5 Kh8 18.Be2+=) 14.cd5 (14.Rd1 Bg6+/–) 14...Bd5+= 15.Bc4 Bc4 16.Qc4 Kh8 17.0–0 ab5 18.ab5 Ra1 19.Ba1 (19.Ra1 c6+=) 19...c6 20.bc6 Nc6 21.Qg4 (21.Ne4 Qe7+=) 21...Qc8= 22.Qc8 (22.Qh5 Qe6=) 22...Rc8 23.Ne4 (23.Rc1 Ra8=) 23...Kg8 24.Nc5 (24.Bc3 Re8 25.Nc5 bc5+=) 24...bc5+= 25.g3 (25.Bc3 Ra8+=) 25...Nb4 26.Rc1 (26.Bc3 Nd3–/+) 26...c4 (26...Nd3 27.Rc2–/+) 27.f4 (27.Bd4 Nd3 28.Rc3 Kf7+=) 27...Kf7 (27...Nd3 28.Rc2–/+) 28.Bd4+= g6 (28...Nd3 29.Rc3–/+) 29.Kf1 (29.Rb1 Nd3 30.Rb7 Ke6+=) 29...f5–/+ 30.Ke2 Ke6 31.Kd2 Kd5 (31...Rc6 32.Rg1–/+) 32.Ra1 (32.Rb1 Nd3=) 32...Rc7 (32...Nc6 33.Bf6–/+) 33.Ra5 (better is 33.Kc3!? Nd3 34.Ra5 Ke4 35.Ra4+=) 33...Ke4–/+ 34.Ke2 (34.Ra8–/+) 34...Nd5 (34...Nc6!? 35.Be5 Na5 36.Bc7 Nb3–/+) 35.Ra4 Nb4?? (35...Ne7+=) 36.Ra5?? (better is 36.Rb4 Kd5 37.Rb5 Kc6 38.Ra5+–) 36...Nd5 (better is 36...Nc6 37.Be5 Na5 38.Bc7 Nb3–/+) 37.Ra6 (37.Ra4!?=) 37...Nc3?? (better is 37...Ne7+=) ½–½. Anderson,George – Oberton,Daniel, May TNT University of Winnipeg, 2005.

4.c4 d5 5.e3 (--> 1.b4 e5 2.Bb2 e4 3.e3 Nf6 4.b5 d5 5.c4).

4.d3 ed3 5.cd3 Bb4 6.Nd2 0–0 7.Ngf3 d5 8.e3 Re8 9.Be2 c5 10.a3 Ba5 11.0–0 Bc7 12.a4 Bf5 13.Nb3 b6 14.Nh4 (14.a5 Nbd7=) 14...Be6 15.d4 (15.a5!?=) 15...c4–/+ 16.Nd2 Nbd7 (16...Ne4 17.Ne4 Bh2 18.Kh2 Qh4 19.Kg1 Qe4 20.a5–/+) 17.Re1 (17.Nhf3 a6+=) 17...Rc8 (17...Ne4 18.Ne4 Bh2 19.Kh2 Qh4 20.Kg1 Qe4 21.Bf3–/+) 18.Bc3 Ne4 19.Ne4 Qh4 20.Ng3 Nf6 21.Bf3 Rcd8 22.a5 Bg4 23.ab6 ab6 24.Ra7 Bf3 25.Qf3 Bb8 26.Rb7 Ne4?? (26...Bg3!? 27.hg3 Qe4 28.Rb6 Rb8 29.Rb8 Rb8–/+) 27.Bb4 (27.Qf7 Kh8 28.Qg7) 27...Ng5= 28.Qh5?? (better is 28.Qf5 g6 29.Qc2=) 28...Bg3–+ 29.Qh4 Bh4 30.g3 0–1. Krajewski,Kazimierz (2005) – Wojcieszyn,Zdzislaw (2055), Druzynowe Mistrzostwa Polski Niewidomych POL, 2008.

4.d4 Be7 5.e3 0–0 6.Ne2 d5–/+ 7.g3 c6 8.a4 Bg4 9.Bg2 Qd7 10.Nbc3 Bb4–+ 11.0–0 Bh3 12.Nf4 Bg2–+ 13.Kg2 Qe7 14.Qc1 Nbd7 15.Na2 Ba5 16.Ba3=+ Nb6?? 17.Be7+– 1–0. rthurc (2255) – blinddog (2245), net–chess.com, 2010.

4.e3 (--> 1.b4 e5 2.Bb2 e4 3.e3 Nf6 4.b5).

4.f3 d5 5.e3 Nbd7 6.d3 ef3 7.Nf3 Bc5 8.Bf6 Nf6 9.Nbd2 Be3–+ 10.Ne5? Qe7 11.Ndf3 Qb4 12.Ke2 d4 13.a4 Nd5 (13...Nd5 14.Nd4 Bd4–+) 0–1. tnb (2060) – angelofthenight, net–chess.com, 2006.

3.c3 d5

4.d3 Nf6 5.Nd2 e3 6.fe3 Ng4 7.e4 Bd6 8.Ngf3 Bh2! 9.Rh2 Nh2 10.ed5 Nf1 11.Kf1 Qd5 12.c4 Qh5 13.e3 0–0 14.Ne5 Qf5 15.Ke2 Rd8 (16.e4 Qh5 17.Ndf3 Nc6–+) 0–1. Wartig,Wolfgang – Luzuriaga,Norberto Horacio, email SOK–99–134, 2001.

4.e3 c5

5.bc5 Bc5 6.Bb5 Bd7 7.c4 (better is 7.Qb3 Qg5 8.Bf1+=) 7...Qb6?? (7...Qg5 8.g4–/+) 8.Bg7= a6?? (better is 8...Qg6 9.Bh8 Qg2 10.Bd7 Nd7–/+) 9.Bd7+– (worse is 9.Bh8 ab5 10.cd5 Qg6+–) 9...Nd7 10.Bh8 1–0. Wall,Bill – Brian72, internet, 2003.

5.bc5 Bc5 6.c4 d4=.

5.bc5 Bc5 6.c4 Nf6 7.cd5 Qd5 8.Nc3 Qd8 9.Nb5 Na6 10.Rc1 Be6 11.Nd4 Bd4+= 12.Bd4 0–0 13.Qa4 Rc8 14.Rb1 Nc5 15.Qa7 Qd5 16.Bc5 Rc5=+ 17.Ne2 Rd8 18.d4?? ed3–+ 19.Nf4?? d2 20.Kd1 Rc1! 21.Rc1 dc1Q 22.Kc1 Rc8 23.Kb2 Qd2 24.Ka3 Qa2 (24...Qa2 25.Kb4 Qb2 26.Ka4 Bd7 27.Ka5 Qc3 28.Kb6 Qc7#; 24...Qc3 25.Ka4 Bd7 26.Bb5 Rc4#) 0–1. Blacky – kalle, mySchach.de, 2004.

4.e3 Nf6

5.d3 =+.

5.d4 Bg4 6.Be2 h5 7.f3 Be6 8.Nd2 Nh7 (8...ef3!? 9.Ngf3 Qe7+=) 9.fe4= Qh4 (9...de4!? 10.Ne4 Bd5+=) 10.g3+= Qg5 (10...Qe7!?+=) 11.ed5+/- (11.Bh5?! a5 12.ba5 Nf6+=) 11...Bd5 12.e4 Bc6 13.d5 Bd7 14.Bh5 Qe3 (14...Nf6 15.Bf3+/-) 15.Qe2+– Qe2 16.Ne2 g6 (16...Ng5 17.Bf3+–) 17.Bf3 Bh3 (17...Bg7 18.Rb1+–) 18.c4 Ng5 (18...Rg8 19.a3 a5+–) 19.Bh8 1–0. Wall,Bill – DesertFly, internet, 2001.

3.Nc3 d5

4.a3 Bd6 5.Ne4!+/– de4 6.Bg7+– f6 (6...Be5 7.Be5 Nf6+– 8.d3 0–0 (8...Qe7 9.Bb2 Rg8 10.Qd2 a5) 9.Bb2 Nc6 10.Qd2 Ng4; 6...Nf6 7.Bh8 Nc6 8.Nh3 Be5 9.Ng5 Bf5 10.b5 Nd5; 6...Nc6 7.Bh8 Nf6 8.e3 Be5 9.Rb1 Bf5 10.f4 Bd6; 6...Bf5 7.Bh8 Nf6 8.e3 Nc6 9.Ne2 Be5 10.Ng3 Qd7; 6...a5 7.Bh8 Nf6 8.Nh3 Bf5 9.e3 Nc6 10.b5 Ne5) 7.e3 (7.Bh8 Kf7 8.e3 Kg6 9.Nf3 (9.Be2 h6 10.f3 Kh7) 9...ef3 (9...h6 10.Nh4 Kh7) 10.Bd3 f5) 7...Be5 (7...Kf7 8.Bh8 Kg6 9.Nf3+– ef3 (9...h6 10.Nh4 Kh7) 10.Bd3 f5) 8.Rb1 (8.Rc1 Ne7 9.Bh8 Ng6 10.Qh5 Qe7) 8...Ne7 9.Bh8 Bf5 (9...Kf7 10.Qh5 Kg8 11.f4 Kh8 12.fe5+–) 10.f4 (10.Bc4 Nbc6) 10...Bd6 (10...ef3 11.Nf3 Qd5 12.d4+–; 10...Kd7+–) 11.Bf6 Nbc6 (11...Nd7 12.Bh4 c6 13.Ne2+–) 12.g4 Be6 (12...Bg6 13.Nh3 Qd7 14.Bc4+–) 13.g5 Qd7 (13...Bf5 14.Bh3 Qd7 15.Qh5 Kf8 16.Qh7 Bh7 17.Bd7+–) 14.Qh5 Bf7 (14...Ng6 15.Bh3+–) 15.Qh7 0–0–0 (15...Qf5 16.Qh8 Bg8+–) 16.Qf7 Nf5 17.Qd7 Rd7 18.Bh3 (18.Bh3 Nfe7 19.Ne2+–) 1–0. pierre – themuppetshow, internet, 2011.

4.a3 Nh6 5.e3= c5 (5...Bg4 6.Be2 Be6 7.d3=) 6.Nge2 Bg4 (6...cb4 7.ab4 Nc6 8.b5+=) 7.h3 d4? (better is 7...cb4!? 8.hg4 bc3 9.Nc3 Rg8+/–) 8.Ne4+– Be2 (8...Qh4 9.Nc5 (9.hg4?! Qh1 10.N2g3 Qh4+/–) 9...Bc5 10.bc5 (10.hg4?! Qh1 11.bc5 de3 12.de3 Nc6+/–) 10...de3 11.g3 ef2 12.Kf2+–) 9.Qe2 (9.Ke2?! cb4 10.ab4 Qd5+/–; 9.Be2?! cb4 10.Bd4 Nc6+/–) 9...cb4 10.ed4 Threatening mate: Nf6 10...Be7 11.Qb5 Nc6? (11...Nd7 12.ab4 Qc7+–) 12.Qb7 Nd4 13.Bd4 0–0 14.Be3 ba3 15.Bh6 Rb8 16.Qa7 gh6 17.Qe3 Re8 18.Bd3 (18.Bc4 Qc7 19.Qe2 Kg7+–) 18...Bg5 (18...f5 19.0–0 fe4 20.Qe4+– (20.Be4?! Bd6+–)) 19.Qg3 (better is 19.f4 Bh4 20.g3 Be7+–) 19...f5 20.h4 Qd4 (20...fe4 21.Bc4 Kh8 22.hg5 Qd4+–) 21.c3 (21.hg5?! Qa1 22.Ke2 Qd4 23.gh6 Kh8=) 21...Qe5 22.Qe5 Re5 23.hg5 hg5 24.Ra3 fe4 Do you see the mate threat? 25.Bc4 Kh8 26.Ke2 Rc8 27.Ba2 g4 (27...Rce8 28.Ke3+–) 28.Ra7 h5 29.Rb1 h4 30.Rbb7 Rh5 Black plans h3 31.Be6 h3 (31...Rd8 32.Bg4 Re5+–) 32.Bc8 hg2 (32...Rg5 33.Rh7 Kg8 34.Be6 Kf8 35.Ra8) 33.Be6 1–0. Birzer,Lothar – Rosek,Holger, DESC, 1998.

4.b5 Nf6 5.e3 (--> 1.b4 e5 2.Bb2 e4 3.e3 Nf6 4.b5 d5 5.Nc3).

4.d4 Bb4 5.e3 a6 6.Nge2 g5 (6...Nf6 7.Nf4–+) 7.a3 Ba5 (7...Be7 8.Ng3–/+) 8.g3 (8.Nc1!?–/+) 8...Bg4–+ 9.Bg2 f5 (9...Qf6 10.0–0 Ne7 11.Nb1–/+) 10.0–0–/+ Nf6 11.Na4 (11.h3 Bf3–/+) 11...Nbd7 12.h3 Bh5 13.Bc3 c6 14.Qd2 Bc3 15.Nac3 (15.Nec3 Qc7–/+) 15...Qa5 (15...Nb6 16.Rfb1–+) 16.Rfe1 (16.f3 b6 17.Nc1 ef3 18.Bf3 Bf3 19.Rf3+=) 16...b5 (16...Be2 17.Re2 b6 18.Ree1–+) 17.Ra2 (17.Ne4 Qd2 18.Nd2 Ne4+=) 17...h6 (17...Be2 18.Re2 Qc7 19.a4–+) 18.Qc1? (better is 18.Ne4!? Qd2 19.Nd2+=) 18...Bf3 19.Ra1 h5 Black prepares g4 (19...g4 20.h4–+) 20.Qb2 (20.Qd2 Be2 21.Re2 Qc7–+) 20...Bg2 (20...h4 21.a4 b4 22.Na2–+) 21.Kg2 h4 22.Nc1 (22.Rh1 hg3 23.fg3 Nb6–+) 22...g4 23.Nb3 (23.Rh1 hg3 24.Nb3 Qc7 25.fg3 gh3 26.Rh3 Rh3 27.Kh3 Nb6–+) 23...Qc7 (23...gh3 24.Kg1 Qc7 25.Ne2–+) 24.Ne2 (24.Rh1 hg3 25.fg3 gh3 26.Rh3 Rh3 27.Kh3 Nb6–+) 24...gh3 25.Kh3 (25.Kg1–+) 25...hg3 26.Kg2 Rh2 27.Kf1 (27.Kg1 gf2 28.Kf1 Rh1 29.Ng1 fg1Q 30.Ke2 Qch2 31.Kd1 Qe1) 27...gf2 (27...g2 28.Kg1 Rh1 29.Kg2 Qh2) 28.Red1 (28.Nf4 Nh5 29.Nh5 Rh1 30.Ke2 fe1R 31.Re1 Qh2 32.Kd1 Qh5 33.Kd2 Qh2 34.Re2–+) 28...Ng4 (28...Rh1 29.Ng1 fg1Q 30.Ke2 Rh2) 29.Nd2 (29.Ng3 Ne3 30.Ke2 f1Q 31.Ke3 Qg3) 29...Ne3 0–1. DanielMena – dhub noire, ChessWorld.net, 2006.

4.Nd5 Qd5 5.e3 Bb4?? 6.c3?? Ba5 7.Bb5 Qb5 8.c4 Qb2 9.Rb1 Qa2 10.Ke2 Qc4 11.d3 ed3 12.Qd3 Qa2 13.Kf3 Nf6 14.Qb5 c6 15.Qe5 Be6 16.Rb7 Qd5 17.Qd5 Bd5 18.Kf4 c5 19.Rb5 Bb6 20.Nf3 Bf3 21.gf3 0–0 22.Rd1 Nc6 23.e4 Rfd8 24.Rd8 Rd8 25.Kf5 Nd4 26.Ke5 Nb5 (26...Nb5 27.Kf4 c4–+; 26...Bc7#) 0–1. alarconconsult – 2doubleu, internet, 2007.

4.e3 Bb4 5.Nge2 Nf6–/+ 6.Nf4 Nc6 7.Bb5 Bd7 8.Bc6 Bc6–/+ 9.0–0 Bd6 10.Ncd5? Nd5–+ 11.Nd5 Bd5 12.Bg7 Rg8 13.Bd4 Qg5 14.g3 Be6 15.Kg2 Bg4 16.h4 Bf3 17.Kh2 Qh4 18.Kg1 Qh1 0–1. gtate (1765) – davidro (1685), net–chess.com, 2002.

4.e3 Nf6 5.b5 (--> 1.b4 e5 2.Bb2 e4 3.e3 Nf6 4.b5 d5 5.Nc3).

4.Nh3 Bb4 5.Nf4 Nf6 6.Nb5 c6 7.a4?? (better is 7.Bf6 gf6 8.Nd4–/+) 7...cb5–+ 8.ab5 0–0 (8...e3 9.fe3 Ne4 10.c3 Qh4 11.g3 Ng3 12.Ng2–+) 9.g3 (9.Bf6 gf6 10.e3 d4–+) 9...Bc5 10.Bh3 Bh3 11.Nh3 Qb6 12.Ra3 (12.Bf6 Qf6 13.0–0–+) 12...Ba3 13.Ba3 Re8 14.Qa1 Qb5 15.Nf4 Nbd7 16.Bd6 (16.Bb2 Qc6–+) 16...Qb6 17.Qa3 (17.Ba3–+) 17...Qb1 18.Qc1 Qc1 0–1. Chood (1960) – Sterling (2060), ChessWorld.net, 2003.

4.a3 a5

5.e3 Nf6 6.Nge2 Nbd7 (6...ab4 7.ab4 Ra1 8.Qa1 Bb4 9.Qa4 Nc6 10.Nd4+=) 7.Nf4 c6 8.b5 Bd6 9.d3 0–0 10.de4 Qe7 11.Be2 de4 12.0–0 Rd8 13.bc6 bc6 14.Qc1 Rb8 15.Rd1 Nc5 16.Bc4 g5 (16...Bg4 17.Rd4–/+) 17.Nfe2+= Ng4 18.Ng3 Be5 19.Rd8 Qd8 20.Nd1 (20.Rb1 Rb2! 21.Qb2 Na4 22.Na4 Bb2 23.Nb2 Qe7–/+) 20...Bb2 (20...Rb2 21.Nb2 Qf6 22.Nd1 Ba1 23.c3–/+) 21.Nb2 Nf2! 22.Qf1 (22.Kf2 Qf6 Double attack) 22...Qf6–+ (22...Rb2 23.Qf2 Be6 24.Be6 fe6 25.Rf1+=) 23.Rd1 Rb2 (23...Qb2 24.Qf2 Be6 25.Be6 fe6 26.Rf1+=) 24.Nh5 Nh3! 25.gh3 Qf1 26.Bf1 Nb7 27.Ba6 h6 (27...Rc2?? 28.Bb7 Kf8 29.Bc8+–; 27...Bh3 28.Bb7 f5 29.Bc6 Rc2 30.Bd7+/–) 28.Bb7 Bb7 29.Rd8 Kh7 30.Nf6 Kg7 31.Ne4 Rc2 32.Nd6 Rc1 33.Kf2 Ba6 34.Ra8 Rc2 35.Kg1 Bd3 36.Ra5 Kg6 37.Ra7 (37.e4 c5–/+) 37...f6 38.Ra8 c5 (38...f5 39.h4–/+) 39.Rg8 Kh7 40.Rc8 c4 41.a4 c3 42.e4 Rc1 43.Kf2 c2 44.Ke3 Rd1 45.Nf5 Be4! (45...Be4 46.Ke4 c1Q 47.Rc1 Rc1–+) 0–1. Valverde,Mario (2030) – Buettner,Fritz (2405), CiF, 2010.

4.a3 f5

5.e3 Nf6 6.Nb5 a6 7.Bf6 gf6 8.Qh5 Ke7 9.Nd4 Qd7 10.Nge2 Nc6 11.Rg1 (11.g3 Nd4 12.Nd4 Qe8 13.Nf5 Kd8+=) 11...b6 (11...Nd4 12.Nd4 Kd8 13.Qh4=) 12.Nc6+= Qc6 13.Nc3 (13.Nf4 Bg7+=) 13...Be6 (better is 13...Kd8!?=) 14.Ba6!+/– Qd7 (14...Ra6 15.b5) 15.b5 Bf7 (15...Kd8 16.Qh4 Be7 17.Ne2+/–) 16.Qh4 h5 (16...c6 17.bc6 Qc6 18.Bb5+/–) 17.f3 (17.Ne2 f4 18.Nf4 c6+/–) 17...Bh6 (17...Rg8 18.Bb7 Ra7 19.Bc6+/–) 18.Bb7 Rag8 (18...Ra7 19.Bc6 Qd6 20.fe4 de4 21.Qf2+=) 19.Qf2+– Be6 20.g3 Qd6 21.fe4 (21.Rf1 h4+/–) 21...fe4 22.Ne2 (22.Rf1 f5 23.Ne2 h4+/–) 22...Qc5 23.Nd4+– Bd7 24.Rf1 Rf8 25.Bc6 Bg4 26.Qg2+– Bg7 27.Nf5 Bf5 28.Rf5 Rd8 29.c3 Ke6 30.Qh3 Ke7 31.Rh5 Qd6 32.Rh7 Rh7 33.Qh7 Kf7 34.Qh5 Ke7 35.Qg6 Rg8 36.Qh7 Kf8 37.Qh5 Qe7 38.Qd5 Rh8 39.h4 f5 1–0. pierred (2175) – Postovitsch (1865), ICC, 2006.

5.e3 Nf6 6.Nb5 Be7 7.Be5 Bd6 (7...Na6 8.Nd4=) 8.Nd6+= cd6 9.Bb2 0–0 10.Ne2 Nc6 11.Nf4 a5 (11...Ne5 12.d3+=) 12.Bf6 Qf6 13.Nd5 Qe5 (13...Qd8 14.b5 Ne7 15.Nf4+/–) 14.Nb6 Ra7 15.Bc4 Be6? (better is 15...Kh8 16.b5 Ne7+/–) 16.Nd7+– Rd8 (16...Bc4 17.Ne5 Ne5+–) 17.Ne5 Bc4 (17...d5 18.Nc6 bc6 19.Be2+–) 18.Nc4 a4 (18...d5 19.Na5 Na5 20.ba5 Ra5 21.d3+–) 19.b5 Ne7 20.Qh5 (better is 20.d3 d5 21.de4 Raa8 22.ed5 Rd5+–) 20...g6 21.Qh4 Rd7 22.Nb6 Rc7 23.Qf6 Nc8 24.Qd8 (24.Qd8 Kg7 25.Qc7 Kh6 26.Qc8+–) 1–0. pierre – First Knight, ChessHere.com, 2005.

4.a3 Nf6

5.d3 Bd6+=.

5.e3 a5 6.b5+=.

5.e3 a6 6.f3 Bf5 7.Be2 b5 8.d4 Bd6 9.Na2 0–0 10.Nc3 Nbd7 11.f4 Nb6 12.g4? Bc8?? 13.g5–/+ Ne8 14.Rb1 Be6 15.Bg4 Nc4 16.Be6–/+ fe6 17.Qe2 g6 18.Nd1 Ng7–+ 19.Qg4 Nf5 20.Ne2 Qe7 21.Bc1 c6 22.h4–/+ Kf7 23.h5 Rh8 24.Ng3 Ng3 25.Qg3 gh5 26.Rh5= Rag8 27.Nf2 h6 28.Nh3 Rg6 29.Ke2 Ke8–/+ 30.Qg4 Qf7 31.Qh4 Bf8 32.Nf2? Nd6?? 33.Ng4 Nf5 34.Ne5 Nh4–/+ 35.Nf7 Kf7 36.Rh4 Bg7 37.Bd2 hg5–+ 38.fg5?? Rg5 39.Rf4 Rf5 40.Rbf1 Rf4 41.Rf4 Bf6 42.Be1 Ke7 43.Bg3 e5?? 44.Rg4?? ed4–+ 45.ed4 Bd4 46.Bh4 Kf7 47.Rf4 Ke6 48.Bf2 Bf2 49.Rf2 Rc8 50.c3 c5 51.Kd2 cb4 52.ab4 Ra8 53.Ke3 a5 54.Ra2 a4 55.Kd4 Rc8 56.Ra3 Rc4 57.Ke3 Ke5 58.Kd2 d4 59.cd4 Kd4 (59...Kd4 60.Ke2 Rb4–+) 0–1. dugmak – Ginger Prince, ChessWorld.net, 2004.

5.e3 c6 6.d3 Bf5 7.de4 Be4 8.Ne4 Ne4 9.Bd3 f5 10.Be4+– fe4 11.Qh5 Kd7 12.Qg4 Kc7 13.Be5 Kb6 14.c4 Nd7 15.Bd4 c5 16.bc5 Nc5 17.Rd1 Kc6 18.Bc5 Kc5 19.Rd5 Qd5 20.cd5 Kd5 21.Ne2 Ba3 22.Qd7 1–0. MT – guest68, ICC, 2004.

5.e3 c6 6.Nge2 a5 7.b5 c5 (better is 7...Bd6!?=) 8.d3+= ed3 9.Qd3 b6 10.0–0–0 Be6 (10...Ng4 A) 11.Nd5 Nf2 12.Qd2 Nd1 (12...Nh1?? 13.Nf6 Qf6 14.Bf6+–) 13.Qd1 c4=; B) 11.Qd5 Qd5 12.Nd5+/–) 11.Nf4+/– Be7 (better is 11...c4!? 12.Qd2 Nbd7+/–) 12.Ncd5+– Bd5 13.Nd5 Nd5? (13...Qd5 14.Qd5 Nd5 15.Rd5+–) 14.Qd5 (better is 14.Bg7 Bf6 15.Bh8 Bh8 16.Qh7 Bb2 17.Kb2 Qf6 18.Kc1 Qa1 19.Kd2+–) 14...Qd5 15.Rd5 f6 16.Bc4 Nd7 17.Rhd1 Rd8 18.e4 Rf8 19.f4 g6 20.R5d2 h5 21.Be6 Nb8 22.Rd8 Bd8 23.f5 g5? 24.g3 Ke7? 25.e5 fe5 26.Be5 1–0. guest333 – nicojaa, ICC, 2003.

5.e3 Bd6 6.d3 0–0 7.de4= de4 8.g3 Nbd7 9.Bg2 Re8 10.Nge2 Nb6 11.Rb1 Nc4–/+ 12.0–0 Nb2 13.Rb2=+ Bg4 14.Qe1 c6 15.Rb1 Qd7 16.Na4 Bf3 17.Bf3= ef3 18.Nd4 Qg4 19.Qd1 Rad8 20.Qf3+= Qh3 21.Rfd1 Ng4 22.Qg2 Qh6 23.c4 Bc7 24.Nc3?? Ne3!–+ 25.fe3 Qe3 26.Qf2 Qc3 27.Rb3?? Qc4 28.Rbd3 Bb6 29.Qd2 Re4 30.Kg2 Red4 31.Rd4 Qd4 (31...Qd4 32.Qd4 Rd4 33.Rd4 Bd4–+) 0–1. alaamattar (2205) – michelleke (2165), net–chess.com, 2005.

5.e3 Be7 6.Bb5 (6.d3 0–0+=) 6...c6 7.Be2 0–0 8.d3 a5 9.b5 cb5 10.Nb5 Bd7 (10...Nc6 11.Rb1+=) 11.Nc3 (11.de4 de4 12.Nd6 Bc6+=) 11...Nc6 12.de4 de4 13.Bc4 (13.Nd5!?=) 13...Qb6–/+ 14.Na4 Qa7 15.Bb5 (15.Qe2 Rac8–/+) 15...Bg4 (15...Rad8 16.Qe2–/+) 16.Be2 (16.Qb1 Rfd8–/+) 16...Rfd8 17.Qb1 Be2 18.Ne2 b5 19.Nac3 b4 (19...Rab8 20.Ng3+=) ½–½. Wlosek,Maciej – Frysiak,Adam, corr 2AMM Poland, 1994.

3.c4 Bb4??

4.Bg7 c5 5.Bh8 f6 (5...Nc6 6.a3 Ba5 7.Nc3 Bc3 8.Bc3+–) 6.e3 (better is 6.a3 Ba5+–) 6...b6 (6...Qe7 7.Qg4 Qe6 8.Qh5 Qf7 9.Qf7 Kf7 10.Ne2+–) 7.Qg4 Nc6 (7...Kf7 8.Qe4 Nc6 9.Qh7 Ke6 10.Ne2+–) 8.Qg8 Ke7 9.Qh7 Kd6 10.Nc3 (better is 10.Qh6!? Qe8+–) 10...Bc3 11.dc3 Kc7 12.Qh4 (12.0–0–0 f5+–) 12...Ba6 (12...f5 13.Qd8 Kd8 14.h4+–) 13.Bf6 Qg8 (13...Qe8 14.Nh3 Bb7 15.Ng5+–) 14.Qe4 Re8 15.Qd5 (better is 15.Qf4 Kc8+–) 15...Ne7 16.Be7 Re7 17.Qg8 Bc4 18.Bc4 Re4 19.Qg3 (19.Ba6 Re3 20.fe3 Kd6 21.Rd1 Ke7 22.Qg7 Ke6 23.Bc8 Kf5 24.Bd7 Ke4 25.Qe7) 19...d6 20.Qg7 Kd8 21.Bb5 Re7 22.Qf8 Re8 (22...Kc7 23.Qe7 Kb8 24.Ba6 d5 25.Qd8) 23.Qd6 1–0. b4_player – opponent, gamecolony.com, 2007.

4.Bg7+– d5 5.Bh8 dc4 1–0. themonkey – NN, GameColony.com, 2002.

4.Bg7 d6 5.Bh8 f6 6.Qa4 Nc6 7.a3 Bc5 8.g3 Bd7 9.e3 Nd4 10.Qd1 Ne6 11.Qh5 Ke7 12.Qh7 Kf8 13.Bh3 Qe7 14.Qe4 Bc6 15.Qe6 Qe6 16.Be6 Bh1 17.f3 Ke7 18.Bd5 c6 19.Be4 Nh6 20.Bg7 Nf7 21.d4 Bb6 22.Bg6 Ba5 23.Nd2 Bg2 24.Ke2 Rg8 25.Bf7 Kf7 26.Nb3 Bc7 27.Bf6! Kf6 28.Kf2 Bf3 29.Kf3 Rh8 30.h4 Rg8 31.d5 Ke5 32.Rd1 Bd8 33.Ne2 Rf8 34.Nf4 a6 35.dc6 bc6 36.Nd4 c5 37.Nde6 Re8 38.Nd8 Rd8 39.g4 Rb8 40.g5 Kf5 41.Rd5# 1–0. ion Custard – gbymar, ChessWorld.net, 2009.

4.Bg7 Nf6 5.Bh8 Nc6 6.a3 Bc5 7.e3 d5 8.Nc3 d4 9.Bf6 Qf6 (9...de3 10.de3 Qf6 11.Ne4+–) 10.Ne4 Qe5 11.Nc5 Qc5 12.Qb1 b6 (12...de3 13.fe3 h6 14.Nf3+–) 13.Qe4 Be6 14.ed4 Nd4 (14...Qe7 15.d5 Bf5 16.Qe7 Ne7 17.d4+–) 15.Qa8 Ke7 16.Qe4 f5 (16...Nc2 17.Qc2 Qe5 18.Ne2 Qa1 19.Qc1 Qc1 20.Nc1+–) 17.Qh4 Kd6 (17...Ke8 18.Qf6+–) 18.Rc1 Qe5 19.Ne2 Nb3 20.Rc3 Na5 21.Qd8 Bd7 22.Rd3 Kc6 23.Qd7 (23.Qd7 Kb7 24.f4 Qa1 25.Kf2+–) 1–0. mrkt – ruben1, internet, 2011.

4.Bg7+– Nh6 5.Bh8 (5.Bh6?! Qf6 6.Nc3 Bc3 7.dc3 Qh6+=) 5...Bc5 (5...f6 6.e3 Ke7 7.a3+–) 6.e3 d5 (6...Qh4 7.Nc3 Na6 8.g3+–) 7.Qh5 Qd6 (7...Bf8 8.Qd5 Qd5 9.cd5+–) 8.Qd5 Qb6 (8...f5 9.Qd6 Bd6 10.Nc3+–) 9.Qe4 Be6 10.Nc3 Nd7 (10...f5 11.Qh4 Bf8 12.Rb1+–) 11.Rb1 Nf6 (11...Qc6 12.Rb7 Qe4 13.Ne4 Bb6+–) 12.Bf6 (12.Bf6 Qc6 13.Rb7 Qe4 14.Ne4+–) 1–0. mtr – opponent, internet, 2001.

4.Bg7 e3!?

5.Nf3 ef2 6.Kf2 Bc5 7.d4 Bb4 8.Bh8 f6 9.a3 (9.Qb3 c5 (9...Nc6 10.e3 Ba5 11.Bd3 Qe7 12.Qb5 Kd8 13.Qh5 h6 14.Qg6 Qf8+–) 10.a3 Ba5 11.Qe3 Qe7 12.Qe7 Ke7 13.e3 d6 14.Bd3 h5+–; 9.Qc2 Qe7 10.a3 Bd6 11.Nc3 c6 12.Qe4 Qe4 13.Ne4 Be7 14.Ng3 d5+–) 9...Ba5 (9...Bf8 10.Qd3 Qe7 11.Nc3 c6 12.Qf5 Nh6 13.Qh5 Kd8 14.e4 d6+–) 10.e4 Nc6 11.Nh4 Qe7 12.Qh5 Qf7 13.Qf7 Kf7 14.Ke3 d6+– 1–0. pierre – salve, internet, 2011.

5.Nf3 ef2 6.Kf2 Bc5 7.d4 Bb6 8.Bh8 Nf6 9.Bf6 Qf6 10.Nc3 c5 11.Nd5 Qg6 12.e3 cd4 13.Nd4 Bd4 14.Qd4 Qc2 15.Kg1 (15.Kg1 d6 16.Bd3 Qd3 17.Qd3+–) 1–0. orane – cdchess, caissa.com, 2006.

5.Nf3 ef2 6.Kf2 Nf6 7.Bh8 Bc5 (7...Ne4 8.Ke1+–) 8.d4 Ng4 9.Kg1 Bd6 (9...Ke7 10.Qd2 (worse is 10.dc5 Qh8 11.Na3 Na6+–) 10...Qh8 11.Qg5 (11.dc5?! Qa1 12.Nc3 Nf6+–) 11...Ke8 12.Qg4+–) 10.Qd3 Bh2 (10...Qe7 11.e4 f6+–) 11.Nh2 d6 (11...Nh2 12.Rh2 d6 13.Nc3+–) 12.Qe4 Kf8 13.Ng4 (13.Ng4 Bg4 14.Rh7+–) 1–0. mtrold1 – opponent, internet, 2001.

5.Nf3 Nf6 6.Bh8 ef2 7.Kf2 d5 8.cd5 Nd5 9.Qc2 Be6 (9...Nf6 10.e3+–) 10.e4 Nf4 11.Be5 Bd6 12.Bf4 Bf4 13.Qb2 b6 14.Qh8 Ke7 15.Qh7 Nc6 (15...Be5 16.Nc3 Nc6+–) 16.Qh4 f6 17.Qf4 Nb4 (17...Ne5 18.Nc3+–) 18.Nc3 Nd3 (18...c5 19.e5 fe5 20.Qe5+–) 19.Bd3 (19.Bd3 Qd3 20.Qc7 Kf8 21.Rac1+–) 1–0. marekt – timothy64, GameColony.com, 2002.

4.Bg7 f6

5.Bh8 Nc6 6.Nc3 (6.a3 Ba5+–) 6...Bc3 7.dc3 d6 (7...Ne5 8.Qd5 Kf8 9.Qe4+–) 8.Qd5 Nce7 (8...Kf8 9.c5 (worse is 9.Qe4 Qe7 10.Qe7 Nce7+–) 9...Ne5 10.e3+–) 9.Qh5 Kd7 10.Qh7 c5 (10...Qe8 11.Qe4 Qf7 12.c5+–) 11.Qe4 Qa5 12.Qc2 b6 13.Rd1 Ba6 14.e3 Nf5 (14...Bb7+–) 15.Qf5 Kc7 16.Qh7 Kc6 17.Rd2 Bc4 18.Bc4 d5 19.Bd5 Kb5 20.Qd7 Ka6 21.Bb7 1–0. pierre_d – Haech, ChessWorld.net, 2005.

5.Bh8 Nc6 6.e3 d5 7.Qh5 Kd7 8.Qd5 Ke7 9.Qe4 Be6 10.Qh7 Bf7 11.Nf3 Qf8 12.Bg7 Bg6 13.Bf8 (13.Bf8 Kf8 14.Qg6+–) 1–0. gtate (1865) – tdinardis, net–chess.com, 2003.

5.Bh8 d5 6.e3. GuestNZTQ – GuestQKMM, freechess.org, 2017.

5.Bh8 Qe7 6.a3 Ba5 7.Qc2 Nc6 8.e3 d6 (8...Nd8 A) 9.c5 Nf7 10.Bc4 Ngh6 11.Qa4 Qc5 12.Bf6 Ne5 13.Be5 Qe5 14.Ra2 c6 15.Ne2 Bc7; B) 9.Be2 Kf8 B1) 10.Qa4 Qc5 (10...b6 11.Nc3 Bc3 12.dc3 Nf7 13.Nh3 Nh8 14.Nf4 Bb7 15.0–0 Ng6) 11.Nc3 Bc3 12.dc3 Nf7 13.Qc2 Qc6 14.f3 Nh8 15.fe4 Qc5; B2) 10.Nc3 Bc3 11.Qc3 Nf7 12.f3 Nh8 13.fe4 Qe5 14.d4 Qe4 15.Bf3 Qh4; C) 9.Qa4 C1) 9...b6 C11) 10.c5 Qe5 (10...Kf8 11.Bc4 Qe5 12.Ra2 Ne6 13.Be6 Qe6 14.Qc2 Ne7 15.Ne2 Kg8) 11.Qb3 Ne6 12.Nc3 Ne7 13.cb6 Nc5 14.b7 Bb7 15.Qc4 Bc3; C12) 10.Qb5 c5 11.Nc3 Bc3 12.dc3 Nf7 13.Nh3 Nh8 14.Be2 Ng6 15.0–0 Qe5; C2) 9...Qe5 10.Ra2 Ne6 (10...Kf8 11.c5 Qc5 12.Rc2 Qb6 13.Nc3 Nf7 14.Qe4 Nh8 15.Qh7 Nf7) 11.Nh3 Nc5 (11...b6 12.Qb5 Nc5 13.Be2 Ne7 14.Nf4 Ba6 15.Qb2 Qb2) 12.Qb5 b6 13.Qb2 (13.Nf4 Ba6 14.Qb2 Qb2 15.Rb2 Kf7) 13...Qb2 14.Rb2 Kf7 15.Nf4 Nh6) 9.Ne2 Be6 (9...f5 10.Nbc3 Nf6 11.Rb1 Bb6 12.Nf4 Ne5 13.Ncd5 Nd5) 10.Nf4 Bf7 (10...Nh6 11.Qb2 Kf7 12.Qb7 Qe8 13.Qb5 Qh8) 11.Nc3 Bc3 12.Qc3 0–0–0 13.Rb1 (13.d3 Qe5) 13...Ne5 (13...Qe5+–) 14.Qd4 Nc6 15.Qb2 b6 16.Qb5 Kb7 17.Qf5 Bg6 18.Ng6 hg6 19.Qg6 Ne5 (19...Kb8 20.g3 Qe5 21.Bg2+–) 20.Qe4 Kb8 21.g3 f5 22.Qf5 Rf8 23.Qh5 Nf3 24.Ke2 Qe4 25.d3 Nd4 26.Bd4 Qh1 27.Bg7 Rc8 28.f4 (28.h4 Ne7+–) 28...Ne7 (28...Qc6 29.Bh3 Rd8 30.Qg5+–) 29.f5 Nf5 30.Qf5 Qh2 31.Kf3 Qh1 32.Kf2 Rg8 33.Rb2 a5 (33...Qb7+–) 34.Bg2 Qc1 35.Qf3 Kc8 36.Qa8 1–0. usingprogram – oleandro, internet, 2011.

5.Bh8 Qe7 6.a3 Ba5 7.e3+–.

5.Bh8 Qe7 6.a3 Bc5 (6...Ba5 7.e3 Qe5 8.Ra2+–) 7.e3 Nh6 (7...d6 8.Nc3+–) 8.Nc3 c6 (8...Qe5 9.f4 ef3 10.Nf3+–) 9.Qh5 Nf7 10.Bg7 d6 11.Qh7 Be6 (11...f5 12.d3 ed3 13.Bd3+–) 12.Ne4 Nd7 (12...f5 13.Qg8 Kd7+–) 13.Qg8 Nf8 14.Nf6 Kd8 15.Qf8 Qf8 16.Bf8 d5 17.Bc5 1–0. Marram – Aydinoglu,Umurbey, internet, 2010.

5.Bh8 Qe7 6.a3 Qe5 7.Ra2+–.

5.Bh8 Qe7 6.e3 Qe5 7.Nc3! Bc3 8.Rb1 (8.dc3?! Qc3 9.Ke2 Qb2 10.Ke1 Qc3 11.Ke2 Qb2 12.Ke1 Qc3 13.Ke2=) 8...Ba5 (8...Ne7 9.dc3 Kf7 10.f4 ef3 11.Nf3 Qe3 12.Be2+–) 9.Rb5 Qd6 (9...Bd2 10.Qd2 Qa1 11.Ke2+–) 10.Qh5 Kd8 11.Ra5 Nc6 (11...Qe7 12.Qg4 Qe6 13.Qg7+–) 12.Qh7 (12.Qf7 Qe6 13.Qf8 Qe8 14.Bf6 Nf6 15.Qf6 Qe7 16.Qh8 Qe8 17.Qe8 Ke8+–) 12...Nce7 (12...Qe6 13.Ra4 d6 14.Ne2+–) 13.Qe4 Nc6 (13...Qb4 14.Rb5 Qa4 15.Rb2+–) 14.Rh5 Qa3 (14...Qf8+–) 15.Bf6 Nf6 16.Rh8 Ne8 (16...Qf8 17.Rf8 Ne8 18.Qe8) 17.Re8 1–0. Janek – mazak, internet, 2016.

5.Bh8 Kf7 6.a3 Bc5 (6...Be7 7.e3 Nh6 8.Qh5 Kg8 9.Qh6 Kh8 10.Nc3+–) 7.e3 Nh6 8.Qh5 Kg8 9.Qc5 Kh8 10.Nc3 d6 (10...Nc6 11.Qh5 Kg7 12.Nh3+–) 11.Qh5 Qf8 12.Ne4 f5 (12...Bf5 13.Ng3 Be6 14.Nf3+–) 13.Ng5 Qg7 14.Rb1 Nd7 (14...Qg6 15.Qh4 Ng4 16.h3+–) 15.Ne6 Qf6 (15...Qg6 16.Qg6 hg6 17.Nc7+–) 16.Qe8 Ng8 17.Nc7 Rb8 18.Nf3 Ne5 (18...Nc5 19.Nd5 Qg6 20.Qd8+–) 19.c5! Nf3 (19...dc5 20.d4 Double attack (20.Qe5 Deflection; 20.d4 Decoy)) 20.gf3 dc5 21.Rg1 Be6 22.Qb8 1–0. pierre – oppopah, internet, 2010.

4.Bg7 Qg5

5.Bh8 f6 6.a3 Ba5 (6...Qe5 7.Ra2 Ba5 8.e3 (8.Nc3 Bc3 9.dc3 Qc3 10.Qd2 Qd2 11.Rd2 Nc6 12.Nh3 Kf7 13.Nf4; 8.Qc2 Nc6 9.e3 Nge7 10.f4 ef3 11.Nf3 Qe3 12.Be2 d6 13.Nc3) 8...Nc6 9.Ne2 b6 10.Nbc3 Nge7 11.Ng3 Bc3 12.dc3 Bb7 13.Qh5) 7.Qc2 d5 (7...Qg6 8.Nc3 Bc3 (8...e3 9.Qg6 hg6 10.fe3 Bc3 11.dc3 Nc6 12.Nf3 d6 13.Nd4) 9.Qc3+– h5 10.g3 Qh6 11.Bg2 Qh8 12.Be4 Ne7 13.Nf3; 7...Nc6 8.Nc3 (8.Qe4 Qe5 9.Qh7 Qa1 10.Qg8 Ke7 11.Qh7 Kd6 12.Nf3 Qb2 13.Kd1) 8...Bc3 9.Qc3 d6 10.Rb1 Kf7 11.c5 Qc5 12.Qb2 Ne5 13.Rc1; 7...Qe5 8.Nc3 Bc3 9.Qc3 Qc3 10.dc3 Nc6 11.Nh3 Kf7 12.Nf4 Nge7 13.Nh5) 8.cd5 (8.f4 Qf5 9.cd5 Nd7 10.g3 Ne7 11.Bh3 Qd5 12.Nc3 Qc5 13.Rc1) 8...Bf5 (8...Qd5 9.Nc3 Bc3 10.Qc3 (10.dc3 Nc6 11.Rd1 Qe5 12.g3 Bf5 13.Bg2) 10...Nd7+– (10...Nc6 11.e3 Bd7 12.Ne2 0–0–0 13.Rc1) 11.Rc1 Qf7 12.Nh3 Ne7 13.Nf4) 9.Qa4 c6 (9...Nd7 10.Qa5 Ne7 11.Nc3+– Kf7 12.Qc7 Rh8 13.d6) 10.Qa5 (10.h4 Qg6 11.Qa5 cd5 12.Qd5 Nc6 13.g4) 10...Ne7 (10...cd5 11.h4 Nc6 12.Qc7 Qh5 13.Qb7) 11.d6 b6 12.Qa4 (12.de7?! ba5 13.h4 Qh6+–; 12.Qc3 Nd5 13.Qd4) 12...Nd5 (12...Ng6 13.h4) 13.Nc3 (13.Qd4+– 10.) 13...Nc3 14.dc3 Kf7 15.Nh3 Bh3 (15...Qg8 16.Qc4 Be6 17.Qe4+–) 16.Qe4 (16.Qe4 Bd7 17.Qh7 Kf8 18.e4+–) 1–0. Lychev,Vassily – Brey Rodrigo,Gonzalo, IECG, 2010.

5.Bh8 f6 6.Nc3 e3 7.de3?? Bc3!

5.Bh8 f6 6.Nc3 e3 7.fe3? Bd6!

5.Bh8 f6 6.Nc3 (6.a3 Qe5 7.Ra2 Ba5+–) 6...Qe5 (6...Bc3 7.dc3 Nc6 8.Qc2+–) 7.Qb3 (7.Nd5 Ba5+–) 7...Bc5 (7...Bc3 8.dc3 Ne7 9.e3+–) 8.Rd1 Nh6 (8...b6 9.Nd5 Bb7 10.d4 ed3 11.Nf3+– (11.Qd3?! Bd5 12.Qb3 Be4+/–)) 9.d4 (9.Qc2!? Nf7 10.Qe4 Qe4 11.Ne4 Nh8 12.Nc5 d6+–) 9...Bd4 10.Nb5 (better is 10.Nd5 Ng4 11.e3 Bb6+–) 10...Bb6 11.Rd5 (better is 11.Qc3 e3 12.fe3 Qc3 13.Nc3+–) 11...Qa1 (11...Ba5 12.Kd1 Qa1 13.Kc2 Qf1+/–) 12.Kd2 (better is 12.Qd1 Ba5 13.Rd2+–) 12...Qf1+= 13.Qg3 Bf2?? (better is 13...Nc6 14.a3 Ne7+=) 14.Nc7 Kd8 (14...Ke7 15.Qd6 Kf7 16.Qf6 Kg8 17.Qg7) 15.Qd6 (15.Bf6) 15...Be3+– 16.Ke3 Nf5 17.Rf5! Qc1 (17...Qf5 18.Na8 Discovered attack) 18.Ke4 (18.Kf2 e3 19.Kg3 Qe1 20.Kh3 Qg3 21.Kg3 Nc6 22.Bf6 Ne7 23.Be7) 18...Qc4 19.Kf3 (better is 19.Ke3 Qc3 20.Kf2 Qd4 21.Qd4 Kc7 22.Qf4 d6 23.Rf6+–) 19...Qc1 (19...Qc6 20.Qc6 dc6 (20...bc6?? 21.Na8 Na6 22.Bf6 Ke8 23.Bg7+–) 21.Na8 Bf5 22.Bf6 Kc8+–) 20.Bf6 1–0. Meybohm,Dirk – Kantz, corr, 1988.

5.Bh8 f6 6.e3 d6 7.Ne2 Nc6 8.Ng3 (8.Nbc3 Ne5 9.Ng3 Bc3 10.Ne4 Qg6 11.Nc3 Nf7 12.Qa4 Bd7+–) 8...Bg4 (8...Qe5 9.Qh5 Qh5 10.Nh5+–) 9.Be2 (9.h4 Qg6 10.h5 Qg5 11.Ne4 Qf5+–) 9...Ne5 (9...Be2 10.Qe2 (< 10.Ne2 0–0–0+–) 10...Qe5 11.Qh5 Qh5 12.Nh5+–) 10.Bg4 Ng4 (10...Qg4 11.Qg4 Ng4 12.Ne4+–) 11.Qa4 c6 (11...Kf7 12.Qb4 Ne7 13.Ne4+–) 12.Qb4 0–0–0 13.Nc3 f5 14.Rb1 (better is 14.Qa5 Ne7 15.Qa7 Kc7+–) 14...Rd7 (14...b6 15.h3 N4h6 16.Qa4+–) 15.0–0 (better is 15.Qa5!? b6 16.Nce4 ba5 17.Ng5 Ne7+–) 15...h5 (15...Ne7 16.Qa4 a6 17.f3 Nh2 18.Kh2 Qh4 19.Kg1 Qg3 20.fe4+–) 16.f3 Nh2 17.Nge4! Qd8 (17...fe4 18.Ne4) 18.Nd6! Kb8 (18...Rd6 19.Qb7) 19.Be5 (better is 19.Nb7!? Qb6 20.Qf8 Kb7+–) 19...Ka8 20.Nb7 Qc8 21.d4 1–0. Lopez Gajete,Antonio – Navas Duran,A, Malaga ESP Primera ch, 1998.

5.Bh8 Nf6 6.a3 Bc5 (6...Qe5 7.Ra2 Be7 8.Nc3+–) 7.Nh3 Qf5 8.Nc3 Nh5 (8...Be7 9.Qc2+–) 9.Qc2 (better is 9.Nd5 Kd8 10.g4 Qg4+–) 9...Nf4 (9...d6 10.Qe4 Qe4 11.Ne4 Bh3 12.gh3+–) 10.Ne4 Nh3 1–0. marekt – NN, GameColony.com, 2002.

3.c4 c5

4.bc5= Na6 5.d4=.

4.bc5 Qc7

5.Qc2 Qc6!?+/– A) 6.Bd4 Na6 (6...f5 7.Qc3 Nf6 8.Bf6 Qf6 9.Qf6 gf6 10.d4 ed3 11.ed3+=) 7.Nc3 f5 8.Nd5 Nc5 9.f3 Ne7 10.Bc5 Nd5 11.Bf8+=; B) 6.d4 ed3 7.ed3 Qc5 8.Qe2 Ne7 9.Nc3 Qa5 10.Nf3 d6 11.Qe3+=; C) 6.f3 f5 (6...ef3 7.Nf3 Na6 8.d4 d6 9.cd6 Bd6 10.d5 Bb4 11.Nbd2+/– 1.31; 6...Nf6 7.Bf6 Qf6 8.Qe4 Kd8 9.Nc3 Na6 10.e3 Nc5 11.Qc2+/–) 7.Bd4 Na6 8.fe4 fe4 9.Nc3 Nc5 10.Bc5 Bc5 11.Qe4+/–.

5.Qc2 Qf4? 6.Nc3 Nf6 7.e3 Qg4 8.Nge2 Be7 (8...Na6 9.Nf4 Qf5 10.Ncd5 Nd5 11.Nd5+–) 9.Ng3 (9.h3 Qg5 10.Ng3 Qg6 11.Nce4 Ne4 12.Ne4 Nc6+–) 9...0–0 (9...Na6 10.Nce4 Ne4 11.Qe4 Qe4 12.Ne4+–) 10.Be2 (10.Nd5 Nd5 11.cd5 Na6 12.Ne4 Qg6+–) 10...Qg6 (10...Qe6 11.Nge4 Ne4 12.Ne4+–) 11.d4 (11.Nd5 Nd5 12.cd5 Na6 13.Qe4 Qe4 14.Ne4 Nc5+–) 11...ed3 (better is 11...Na6 12.Nce4 Ne4 13.Qe4 Qe4 14.Ne4 b6+–) 12.Bd3 Qg5 13.Nce4 Ne4 14.Be4 (14.Ne4 Qg2 15.Ng3 f6 16.Bh7 Kh8+–) 14...g6? (14...Nc6 15.Nf5 Bc5+–) 15.Qc3 f6 16.Bd5 Kg7 17.h4 Qg4 18.h5 Bc5 (18...Na6 19.Ne4 gh5 20.Ng3+–) 19.Bf3 (19.h6 Kh8 20.Qf6 Rf6 21.Bf6) 19...Qe6+– 20.hg6 hg6 21.Ne4 Be7 (21...Na6 22.a3 Qb6+–) 22.Ng5 (22.Ng5 Qg8 23.Qd4+–) 1–0. pzn2pawn (1850) – pedroh (1730), redhotpawn.com, 2016.

5.Qc2 f5 A) 6.d4 d6 (6...ed3 7.ed3 Qc5 8.Qe2 Ne7 9.d4 Qa5 10.Nc3 b6 11.Nf3+=) 7.Nc3 dc5 8.Nd5 Qc6 9.Qb3 Ne7 10.Ne7 Be7 11.d5=; B) 6.f3 Qc6 7.fe4 fe4 8.Bd4 Na6 9.Nc3 Nc5 10.Bc5 Bc5 11.Qe4+/–; C) 6.d3 ed3 (6...e3 7.fe3 Qc5 8.Qd2 Qe7 9.Nc3 Nf6 10.Nf3 b6 11.g3+/–) 7.ed3 Qc5 8.Qe2 Ne7 9.d4 Qd6 10.Nf3 b6 11.Nc3+/–.

5.e3 Qc5 6.f3 (6.d3 ed3 7.Bd3 d5+=) 6...ef3 (6...f5 7.Nc3 Nf6 8.Nb5+=) 7.Nf3 Qh5 (7...Ne7 8.Nc3+=) 8.Be2 Qg6 9.Nc3 Nf6 10.0–0 d5 (better is 10...Qh6+–) 11.Ne5 (worse is 11.cd5 Nbd7+–; worse is 11.Nd5 Nd5 12.cd5 Bd6+–) 11...Qg5 (11...Qh6 12.Nb5 Na6 13.Qa4+–) 12.Nb5 Na6 13.Qa4 Bh3 (13...Nc5 14.Nc7 Kd8+–) 14.Nc7 Kd8 Do you see the mate threat? 15.Nf7 (15.Nf7 Kc7 16.Ng5+–) 1–0. b4_player – opponent, gamecolony.com, 2008.

3.c4 c6

4.a3 d5=.

4.Qc2 Bb4?? 5.Bg7 (5.Qe4?! Kf8+=) 5...d5 6.Bh8+–.

4.Qc2 d5+= 5.cd5 cd5 (worse is 5...Qd5 6.Nc3 Qd6 7.Qe4 Be6 8.a3+=) 6.b5 (6.a3 Nc6+=) 6...Bf5 (6...Nd7 7.d3 Nc5 8.Nd2+=) 7.e3 Nf6 8.Ne2 Nbd7 9.Nd4 Bg6 10.Be2 Rc8 11.Qa4 Nc5 12.Qd1 (12.Qa7?? Ra8 13.Qa8 Qa8–+) 12...Bd6 13.Nc3 0–0 14.0–0 Re8 (14...Qc7 15.f4 ef3 16.Nf3+=) 15.g3 (15.Rc1 Be5 16.Na4 Na4 17.Qa4 Qd6=) 15...Qd7 (15...Qa5 16.f4 ef3 17.Bf3+=) 16.Kg2 (16.Rc1 Be5+=) 16...Be5–/+ 17.Na4 Nd3 18.Qb3 (18.Bc3 Qe7–/+) 18...Nb2 19.Nb2 (19.Qb2 Bf5 20.Rfc1 b6–/+) 19...Bd4 20.ed4 Bf5 21.Rfc1 Bh3 (21...Bg4 22.Bg4 Qg4 23.Qe3–/+) 22.Kg1 Qf5 (22...Bg4 23.Bf1–/+) 23.Nd1 Ng4 (23...Qe6!?–/+) 24.Bg4= Qg4 25.Qe3 (better is 25.Ne3!? Qe2 26.Qd5=) 25...Qd7 26.Nc3 (26.Rc8 Rc8 27.a4 Bf5–/+) 26...Bg4 27.h4 h6 (27...Bf3 28.Kh2–/+) 28.a4 (28.d3 Bf3 29.de4 de4–/+) 28...Bf3 The mate threat is Qh3 29.Kh2 Rcd8 (29...Qf5 30.a5–/+) 30.Ne2 (30.a5 Qf5–/+) 30...g5 (30...a6!?–/+) 31.Ng1+= Qg4 32.hg5? (better is 32.Rc7+=) 32...hg5 (32...hg5 33.Rc3 Qh5 34.Nh3 f6–+) 0–1. Neuhof,KE – Kornath,H, corr ICCF EU/M/GT/055 (year?).

4.e3 Bb4?? 5.Bg7 Nf6 6.Bh8+–.

4.e3 f5 5.Qh5 g6 6.Qd1 Nf6 7.a3 d5 8.d3 Bg7 9.Qc2 0–0 10.f3 (10.Ne2!?+=) 10...Qe7 11.Nd2 (11.de4 fe4 12.Qb3 Be6–/+) 11...ef3 12.Ngf3 (12.Ndf3 Qe3 13.Qe2 Qe2 14.Be2 Re8–/+) 12...Qe3–+ 13.Be2 Ng4 14.0–0–0?? (better is 14.Nf1 Qf2 15.Kd1 Bb2 16.Qb2 dc4 17.dc4 Rd8 18.Kc1–+) 14...Bb2 15.Kb2 Qe2 16.Rhe1 Qg2 17.cd5 cd5 (worse is 17...Nh2 18.Nh2 Qh2 19.Qb3–+) 18.Re7 (18.Qc5 Nf6–+) 18...Nc6 (18...Nh2 19.Qc3 Rf7 20.Qc8 Kg7 21.Rf7 Kf7 22.Qb7 Kf6 23.Re1+–) 19.Rc7 Ne3 (19...Ne3 20.Rg1 Qg1 21.Qc6 bc6 22.Ng1 f4–+) 0–1. Schaar,Joerg (1940) – Fernandez Ballon,Armel (2340), CiF, 2008.

4.Nc3 Nf6

5.a3 a5 6.b5 d5 =.

5.a3 d5 6.e3 (--> 3.e3 d5 4.a3 Nf6 5.c4 c6 6.Nc3).

5.Qc2 d5=+ 6.cd5 (6.a3 a5 7.cd5 ab4 8.Ne4 Nd5=) 6...cd5 7.b5 (7.a3 Nc6=+) 7...Bb4 (7...Bf5 8.e3=+) 8.Rc1 (8.a3 Bc5=+) 8...0–0 (8...Be6 9.a3 Bd6 10.f3=+) 9.e3 Be6 (9...a6 10.Qb3 Be7 11.f3=+) 10.Nge2= Nbd7 11.a3 (11.Nd4 Rc8=) 11...Bc3 (11...Bd6 12.Nd4=+) 12.Nc3= Nb6 (12...Rc8 13.Qa4=) 13.Be2 Rc8 14.0–0 Ng4 (14...Qd6 15.d3=) 15.h3 (better is 15.d3!? Qh4 16.Bg4 ed3 17.Qd3 Qg4 18.f3=) 15...Ne5=+ 16.Qb1 Nbc4 17.Bc4 Nf3 18.gf3 ef3 19.Ne4 Qh4 (19...Qh4 20.Bd5 Qh3 21.Nf6 gf6 22.Bf3 Qf3–+) 0–1. Steiner,Ferdinand – Nicolai,W, corr DDR, 1967.

4.c5 b6

5.d4 a5 6.a3 Nf6 7.Nc3 d5 8.e3 Be7 9.Be2 Be6 10.f3 Nbd7 (10...ab4 11.ab4 Ra1 12.Qa1 bc5 13.bc5+=) 11.fe4 Ne4 12.Nf3 (12.Ne4 de4 13.b5 Nf6=) 12...Bh4 13.g3 Bg3 (better is 13...Be7+=) 14.hg3+/- Ng3 15.Rg1 Qc7 16.Kf2 (16.cb6 Nb6 17.b5 Rb8+–) 16...Ne4 17.Ne4 de4 18.Ng5 (18.Rg7?! ef3 19.Bf3 ab4 20.ab4 Ke7+=) 18...0–0–0? (better is 18...Bd5 19.cb6 Nb6 20.ba5 Ra5+/-) 19.ba5 (19.Ne6!? fe6 20.Rg7 bc5 21.bc5 Rhg8+–) 19...Nc5 20.Ne6 (20.dc5?! Rd1 21.Rad1 Bb3+/-) 20...Ne6 21.ab6 Qb6 22.Qc2 Rd6 23.Bc3 Qd8 24.Rab1 (better is 24.Qe4 Kd7 25.Bc4+–) 24...Qh4 25.Kf1 Ng5?? (25...Qh3 26.Rg2 Qe3 27.Bb4+–) 26.d5! Rd5? 27.Bg4 f5 28.Be1 Qh6+/- 29.Bh5! Nh3?? 30.Rg6!! Rd6 31.Rh6 gh6 32.Bg3 Rg8 33.Rb8! Kb8 34.Bd6 Kb7 35.Qb3 1–0. Fournier,Frederic – Chalvet,Philippe, Partie Libre (Active), 1996.

5.d4 bc5 6.dc5 Nf6 7.e3 a5 8.a3 ab4 9.ab4 Ra1 10.Ba1 Ba6 11.Ba6 Na6 12.Qa4 Nc7 13.Nc3 Qa8 14.Qa8 Na8 15.Nge2 Nc7 16.Kd2 d5 17.Na4 Be7 18.Nd4 Ng4 19.f3 Ne5 20.fe4 de4 21.Nf5 Bf6 22.Nd6 Ke7 23.Be5 Be5 24.Ne4 Nd5 25.g3 Nb4 26.Rb1 Rb8 27.Nec3 Bc3 28.Nc3 Rd8 29.Ke2 Nd5 30.Rb7 Kf8 31.Nd1 Re8 32.Kd3 f5 33.Kd4 h6 34.h3 h5 35.h4 Re4 36.Kd3 Rg4 37.Rb8 Kf7 38.Rc8 Rg3 39.Kd4 Rg4 40.Ke5 Ne7 41.Rc7 Re4 42.Kd6 Re6 43.Kd7 Re5 44.Rc6 Nc6 45.Kc6 Ke6 46.Kb6 Kd7 47.Nc3 Re3 48.c6 Kc8 49.Nd5 Re4 50.c7 f4 51.Kc6 Re6 52.Kc5 Re5 0–1. Florio – Pini, 1972.

4.e3 Nf6

5.a3 d5 (--> 3.e3 d5 4.a3 Nf6 5.c4 c6).

5.b5 d5 (--> 1.b4 e5 2.Bb2 e4 3.e3 Nf6 4.b5 d5 5.c4 c6).

3.c4 Nc6

4.b5= Nb8 A) 5.Nc3 f5 (5...Nf6 6.Qc2 Qe7 7.g4 h6 8.Bg2 e3 9.fe3 Ng4 10.Nf3 c6 11.Ne4 d6) 6.Qc2 Nf6 7.f3 Qe7 8.Nd5 Nd5 9.cd5 c6 10.Rc1 a6 11.b6 d6; B) 5.Qc2 Qe7 6.Nc3 Nf6 7.g4 h6 8.Bg2 e3 9.fe3 Ng4 10.Nf3 Nf6 11.0–0 d6.

4.b5= Nce7 A) 5.Nc3 Nf6 (5...f5 6.d3 Nf6 7.de4 Ne4 8.e3 Ng6 9.a3 a6 10.Nf3 ab5 11.cb5 Nc3) 6.Qa4 d6 7.f3 ef3 8.Nf3 Bf5 9.e3 Nd7 10.e4 Bg6 11.Qc2 Ne5; B) 5.d3 e3 6.fe3 Nf5 7.e4 Bb4 8.Bc3 Qh4 9.g3 Ng3 10.Nf3 Qf6 11.e5 Bc3; C) 5.Qc2= d5 6.e3 Bf5 7.Ne2 c6 8.Nd4 Bd7 9.Nc3 f5 10.bc6 bc6 11.d3 c5.

4.Nc3 e3 5.fe3 Bb4 (5...Nb4 6.g3 Nf6 7.Bg2 Qe7 8.Nf3 Qe6 9.Qb3 Na6 10.Nd4 Qg4 11.0–0 Nc5) 6.Nd5 Bd6 7.Nf3 f6 8.g3 Rb8 9.Rb1 Nge7 10.Bg2 Nd5 11.cd5 Nb4.

4.b5 Na5

5.Qa4 b6 6.Nc3 Qf6 7.Qc2+= Bc5 (7...Qg6!? 8.Nd5 (8.Ne4 Bb7 9.f3 Be4 10.fe4 Nf6 11.Bf6 Qf6 12.Rd1 a6 13.Nf3 Bc5+=) 8...Bd6+= (8...Kd8 9.e3 Ne7 10.Nf4 Qf5 11.Nge2 Qc5 12.Bd4 Qc4 13.Nc3 Qb4+/–) 9.Qc3 f6 10.c5 Be5 11.Qb4 c6 12.Be5 cd5 13.Bc7 Nc4+/–; 7...Bb7 8.Nd5 Qd6 (8...Qd8 9.Qe4 Ne7 10.e3 a6 11.ba6 Ra6 12.Qf4 d6 13.Nf3 Ra8+/– 1.12) 9.Qe4 Ne7 10.Be5 Qc5 11.Qe3 Bd5 12.Qc5 bc5 13.cd5 Nd5+=; 7...Qe6 8.Nh3 Ne7 (8...Bb7 9.Nd5 Bd5 10.Nf4 Qf5 11.Nd5 0–0–0 12.e3 c6 13.Nc3 Nf6+/–) 9.Nf4 Qc4 10.e3 Qc5 11.Qe4 Bb7 12.Qc2 a6 13.Rc1 Ra7+=) 8.Nh3 (8.e3 Qg6 (8...Qf5 9.Nd5 Kf8 10.f3 Bb7 11.fe4 Qg4 12.Nf3 c6 13.Nf4 cb5+–) 9.Qe4 Qe4 10.Ne4 Bf8 11.Rc1 Bb7 12.f3 Nh6 13.Bd3 a6+–) 8...Nc4? (better is 8...Qg6 9.Nd5 Kd8+/– 10.Nhf4 Qg5 11.Qe4 c6 12.Nh3 Qh6 13.Qf4 f6+/–; 8...Qh4 9.Nd5 Kf8 10.Qc3 f6 11.Nc7 Rb8 12.g3 Qh6 13.Bg2 Bb7+–) 9.Qe4+– (9.Ne4? Qb2 10.Qb2 Nb2–+) 9...Ne5 (9...Ne7 10.Qc4 d5+–) 10.Nd5 Qe6 (10...Qg6 11.Qe5 Kf8+–) 11.Nc7 (11.Nc7 Ke7 12.Ne6+– (12.Qa8?! Nd3 13.Kd1 Nb2 14.Kc2 Qc4 15.Kb1 Kd8+/–)) 1–0. pierre – irka, internet, 2011.

5.Qa4 b6 6.Nc3 (6.c5 Bb7 7.Nc3 f5 8.Rc1 Nf6 9.Nd1 c6 10.Bd4 cb5 11.Qb5 Rc8) 6...Nf6 (6...Bb7 7.c5= (7.Nd5 Ne7 8.Ne7 Qe7 9.e3 a6 10.Qc2 ab5 11.cb5 c6) 7...f5 8.Nd1 c6 9.Ne3 cb5 10.Qb5 Bc6 11.Qa6 Nh6) 7.f3 (7.Nd5 Be7= 8.Rc1 Bb7 9.Be5 d6 10.Bf6 Bf6 11.Qc2 0–0) 7...Bb7 (7...ef3 8.Nf3 a6 9.e4 Bb7 10.Qc2 ab5 11.cb5 Qe7) 8.fe4 Ne4 9.Ne4 Qe7?? (better is 9...Be4 10.d3 Bb7= 11.Nf3 a6) 10.Nf2 Qh4 (10...f6 11.e3+–) 11.e3 Qg5 (11...a6 12.Qc2+–) 12.Nf3 Bf3 (12...Qg6 13.Nd3+–) 13.gf3 0–0–0 (13...Nb7 14.f4 Qg6 15.Bd3+–) 14.Bc3 Nb7 (14...Re8 15.Be2 Be7+–) 15.Qa7 (15.Qa7 c5 16.Qb6+–) 1–0. pierre – oppotyq, internet, 2010.

5.Qc2 Qe7= (5...f5 6.g4 e3 7.de3 d5 8.Nd2 Nc4 9.Nc4 dc4 10.Qc4 fg4 11.Rd1 Qe7) 6.Nc3 Nc4 7.Nd5 Qc5 8.Qe4 Ne7 9.Ne7 Be7 10.Bg7 Qg5 11.Bc3 d5.

(...)

4.cd5 c6 5.Qa4 (5.dc6 Nc6 6.b5 Nb4+=) 5...Bd7 (better is 5...Qd5!? 6.Nc3 Qe6=) 6.dc6+/– bc6 7.Nc3 c5? (better is 7...Nf6+/–) 8.b5+– Nf6 9.Ne4 a6?? (9...Nd5+–) 10.Nf6 gf6 11.Qe4 Be7 12.Qa8 ab5 13.Qe4 Bc6 14.Qg4 Rf8 15.Nf3 h6 16.e3 c4 17.a4! Bd7 (17...ba4 18.Bc4 Deflection) 18.Qe4 (18.Qf4 ba4 19.Bc4 Bc6+–) 18...f5 (18...ba4 19.Bc4 Bc6 20.Qf5+–) 19.Qf4 ba4 20.Bc4 Rg8 (20...Qc8 21.Rc1 Qb7 22.Bg7+–) 21.Ne5 Be6 22.Bb5 Bd7 (22...Nd7+–) 23.Qf5 f6 24.Qh5 1–0. marekt – mr_man_+1, internet, 2013.

4.cd5 Nf6 5.a3 (---> 3.c4 Nf6 4.a3 d5 5.cd5).

4.cd5 Qd5

5.a3 a5 6.Nc3 Qe6 7.Qa4 Bd7 8.b5 =.

5.Nc3 Qc4 6.a3 f5 (6...Nf6 7.e3 Qe6 8.d3+=) 7.Rc1 (7.d3 Qe6+=) 7...c6 (7...Nf6 8.d3 Qf7 9.e3+=) 8.e3 Qe6 9.Nge2 (9.d3 Nf6+=) 9...a5 (9...Nf6 10.Nf4 Qd7 11.d3+=) 10.Nf4+/– Qe5 (10...Qf7 11.Ncd5! ab4 12.Nb6 Ra3 13.Nc8+–) 11.Ncd5! Qd6?? (11...Qd5 12.Nd5) 12.Nb6+– Ra6 (12...ab4 13.Na8 ba3+–) 13.Nc8 Qc7 (13...Qh6 14.Ba6 Na6 15.ba5+–) 14.Qh5 g6 (14...Qf7 15.Bg7! Qh5 16.Nh5 (16.Bh8?! Qh4+–) 16...Bg7 17.Ng7 Kf7 18.Ba6 Na6 19.Nf5 ab4 20.ab4 Nb4 21.Rb1 Nd3 22.Ke2+–) 15.Ng6! (15.Bh8 gh5 16.b5 Ra8= (16...Ba3? 17.ba6 Qc8 18.Ra1+–)) 15...hg6 (15...Qf7 16.Ba6 Na6 17.Nf4 Qh5 18.Nh5 (18.Bh8?! Qg5+/–) 18...ab4 19.ab4 Nb4 20.Bh8 Nd3 21.Ke2 Nc1 22.Rc1+–) 16.Qg6 Kd8 (16...Qf7 17.Qf7 Kf7 18.Bc4 Kg6 19.Bh8 ab4 20.ab4+–) 17.Bh8 (17.Bh8 Ra8 18.Qg8+–) 1–0. Wall,Bill – Vital, internet, 2005.

5.Nc3 Qc6 6.Rc1 (6.b5 Qc4=) 6...Nf6 (6...Bb4 7.Ne4 Qg6 8.Qa4 Nc6 9.Rc6 Qc6 10.Qc6 (10.Qb4?! a5 11.Qd4 Qc2+–) 10...bc6 11.Bg7+–) 7.a3 Bf5 8.f3 ef3 9.gf3 (9.Nf3 Qd7+=) 9...Qd7= 10.e4 Be6 11.d4 c6 12.Kf2 (better is 12.b5+=) 12...Nh5?? (better is 12...Be7=) 13.d5+– cd5 (13...Bd6 14.de6 fe6 15.Nh3+–) 14.Bb5 (14.ed5 Qd8 15.de6 Qh4 16.Ke2 Nf4 17.Ke3 Ne6+–) 14...Nc6 15.ed5 (15.Nd5?! Rd8+=) 15...a6 (15...Rd8 16.de6 Qd2 17.Nge2 fe6 18.Qd2 Rd2 19.Ba1+–) 16.dc6 (16.de6 Qe6 17.Nd5 0–0–0+–) 16...bc6 17.Qd7 Bd7 18.Ba4 (18.Re1 Be7 19.Bf1 a5+–) 18...Be7 (18...a5 19.Re1 Kd8 20.Rd1+–) 19.Nge2 (better is 19.Ne4 a5 20.Bc6 Bc6 21.Rc6 ab4 22.ab4 Kd7+–) 19...0–0 (19...a5 20.Nd4 ab4 21.ab4+–) 20.Rhd1 Rfd8 (20...Be8 21.Na2+–) 21.Rd7! Rd7 Decoy to d7 22.Bc6 A double attack 22...Rad8 (22...Bh4 23.Kf1 Rad8 24.Bd7 Rd7 25.Ne4+–) 23.Bd7 Rd7 24.Ne4 Bh4 (24...f5 25.Nc5 Rd2 26.Bc3+–) 25.Ke3 h6 (25...f5 26.Rc8 Kf7 27.Nc5 f4 28.Nf4 Re7 29.Nfe6 Re6 30.Ne6 Ke6 31.Rc6 Kf5 32.Ra6 Bg5 33.Kd3+–) 26.Rc6 (26.Rc5 Bg5 27.Ng5 hg5 28.Rg5 Re7 29.Kf2 g6+–) 26...a5 (26...f5 27.Nd6 (worse is 27.Ra6 fe4 28.fe4 Bg5 29.Kf3 Rd3 30.Kg4 Rd2 31.Kh5 Rb2+–) 27...f4 28.Kd3+– (28.Nf4?! Re7 29.Be5 Re5 30.Kd4 Bf6+–)) 27.ba5 (27.Rc5 g6 28.Ra5 f5+–) 27...Ra7 (27...f5 28.Nd6 f4 29.Ke4 Re7 30.Be5 Nf6 31.Kf4+–) 28.a6 Re7 (28...Kf8 29.Bd4 Ra8 30.a7+–) 29.Rc8 Kh7 30.Bd4 f5 31.a7 Ra7 (31...Bg5 32.Kd3 fe4 33.fe4 Ra7 34.Ba7+–) 32.Ba7 fe4 33.fe4 Bg5 34.Kf3 Nf6 (34...Kg6 35.Bd4+–) 35.Bd4 h5 (35...Kg6 36.a4 Bd2 37.e5+–) 36.a4 Ng4 (36...Bd2 37.Rc6+–) 37.h3 Nf6 38.a5 Nd7 39.a6 1–0. market – gohabsg1, gamecolony.com, 2007.

5.Nc3 Qe5 6.a3 (6.Qc2 Nf6 7.e3 Qe7 8.a3=) 6...Nf6 7.d3 (7.e3 a5 (7...Bd6= 8.d3=) 8.b5=) 7...Bf5 (7...e3!? 8.fe3 Qe3=) 8.de4+= Ne4 9.Nf3 Qf6 10.Qc1 Qb6 (10...Nc3 11.Bc3 Qe7+=) 11.Nd5?? (11.Qf4 Qf6 12.Qc7+– (12.Ne4?! Qb2 13.Rd1 Bd7=)) 11...Qf2=+ 12.Kd1 Bd6 (12...Na6 13.Bd4 0–0–0 14.Bf2 Nf2 15.Ke1 Nh1 16.Nc3+/–) 13.Bd4 (better is 13.Bg7 Be6 14.Bd4 (14.Bh8?! Bd5 15.Rb1 Nc6=; 14.Nc7 Bc7 15.Qc7 Na6 16.Qb7 Rd8 17.Kc2 Qe3 18.Qc6 Ke7 19.Qb7 Rd7 20.Qd7 Bd7–+) 14...Bd5 15.Kc2 Qd4 16.Nd4+/–) 13...Nc3?? (better is 13...Nc6 14.Bf2 Nf2 15.Ke1 Nh1+=) 14.Qc3+– Qd4 15.Nd4 Bg6 (15...Bd7 16.Nc7 Bc7 17.Qc7+–) 16.Nc7 Bc7 17.Qc7 (17...Nd7 18.e3+–) 1–0. pierre – Mamad, internet, 2008.

5.e3 Bf5 6.a3+=.

5.e3 Nf6 6.Bf6= gf6 7.Nc3 Qf5 (7...Qe5!?+=) 8.Qb1+/– Qe5 9.Ne4 (better is 9.Qe4 Qe4 10.Ne4 Bb4 11.Nf6 Kf8 12.Nf3+/–) 9...Bh6? (better is 9...Bb4!? 10.a3 Be7+=) 10.Nf3 Qe7 11.Nd4 (11.a3 Bg4+–) 11...0–0 (11...a5!?+–) 12.Ng3 a6?? (12...Bg7+–) 13.Ndf5 Bf5 14.Nf5 (14.Qf5?! Qd7+–) 14...Qd7 (14...Qe6 15.Nh6 Kh8 16.d4+–) 15.Nh6 Kh8 16.Qe4 Rd8 (16...Nc6 17.b5 ab5 18.Bb5+–) 17.Bc4 (better is 17.d4 Re8 18.Qb7 Qd4+–) 17...Qd2 18.Kf1 Qc2 (18...Kg7 19.Nf7 Qc3 20.Nd8 Qa1 21.Ke2 Qb2 22.Kf3 Qe5 23.Qg4 Qg5 24.Ne6 Kh8 25.Ng5 Kg7 26.Ne4 Kh6 27.Ng3 c5 28.Nf5) 19.Nf7 Kg7 20.Qc2 (20.Qc2 Rd7 21.Qe4+–; 20.Nd8 Qe4 21.Rc1 Nd7 22.Ne6 Kh8–/+) 1–0. pcmvr (2830) – nando (2170), net–chess.com, 2014.

5.Nc3 Qe6

6.a3 Nf6 7.e3 Nc6 8.d3 ed3 9.Bd3 Qg4 (9...Bd6 10.Nb5=) 10.Qg4 (10.Nb5 Qg2 11.Nc7 Ke7+/–) 10...Ng4 (10...Bg4 11.Ne4 Nd7 12.Bb5+=) 11.Nf3 Bd7 12.0–0 (12.Nd5 Rc8+/–) 12...Bd6 13.h3 Nge5 14.Ne5 Be5 15.Rad1 Bc3 16.Bc3 0–0–0? (16...f6 17.Rd2+/–) 17.Bb5?? (better is 17.Bg7 Rhg8 18.Bf6 Bh3 19.Bd8 Nd8 20.Kh2+–) 17...a6 18.Ba4 b5 19.Bb3 Be6 (19...f6!?+=) 20.Be6+/– fe6 21.Bg7 Rd1 22.Rd1 Rg8 23.Bd4 Nd4 24.Rd4 Rd8 25.Rd8 Kd8 26.Kf1 c6 27.Ke2 Kd7 28.Kd3 Kd6 29.Kd4 Kc7 30.Kc5 Kb7 (30...Kd7+–) 31.Kd6 Kb6 32.Ke6 a5 (32...c5 33.bc5 Kc6+–) 33.Kd6 ab4 34.ab4 c5 35.bc5 Ka5 36.c6 b4 37.c7 b3 38.c8Q b2 (38...Ka4 39.Qd7 Ka3 40.Qh7 Kb2 41.Qd3 Ka1 42.h4 b2 43.h5 b1Q 44.Qa3 Qa2 45.Qa2 Ka2 46.g4 Kb3 47.Ke5 Kc4 48.f4 Kb5 49.h6 Kb4 50.g5 Kc4 51.g6 Kd3 52.e4 Ke2 53.g7 Kd3 54.f5 Ke3 55.f6 Ke2 56.g8Q Kd2 57.Qa2 Ke3 58.f7 Kf3 59.f8Q Kg4 60.Qf5 Kh4 61.Qaf2) 39.Qc3 1–0. Fournier,Frederic – ocwal, Active, 2004.

6.Qa4 c6=.

6.Rc1 a6 7.a3 Nf6 8.e3=.

6.g3 Na6!?=.

6.g3 Bb4 7.Nb5+= Bd6?? (better is 7...Qc6 8.Qa4 Na6 9.Bg7 e3 10.Nc7 Nc7 11.Qc6 bc6 12.fe3 Nd5 13.Bh8 Ne3+–) 8.Bg7+– (worse is 8.Nd6 Kf8 9.Bh3 Qd6 10.Bc8 Nd7 11.Bb7 Rb8+–) 8...f6 (8...Na6 9.Nd6 Qd6 10.Bh8+–) 9.Bh3 (9.Bh8 Nc6+–) 9...Qe7 10.Bc8 Qg7 11.Bb7 c6 (11...Be5 12.Nc3 f5+–) 12.Nd6 Kd7 (12...Kf8 13.Qb1+–) 13.Ne4 f5 14.Nc3 Ne7 15.Ba8 Na6 16.Qa4 Ra8 17.Qa6 Nd5 18.Rb1 (18.Rb1 Nc7 19.Qd3 Ke8 20.Qf5+–) 1–0. pierre – oppokeq, internet, 2010.

6.Nh3 Bb4 7.Nb5 Qc6 8.Qa4 Bh3 9.Bg7+–.

6.Nh3 Nf6 7.Nf4 Qf5 8.g3 Qd7 (8...Nc6 9.Bh3 Qg5 10.Bg2 Bb4 11.Ne4 Ne4 12.Be4+=) 9.Qc2 Bd6? (9...Qc6 10.b5 Qc5+/–) 10.Ne4 (10.Bh3 Qd8 11.Bc8 Qc8 12.Ne4 Nbd7+–) 10...Ne4 11.Qe4 Kf8 12.Bg7! Kg7 13.Qd4 f6 (13...Kg8 14.Nh5 Kf8 15.Qh8 Ke7 16.Qf6 Ke8 17.Qg5+–) 14.Nh5 Kf7 (14...Kf8 15.Qf6 Qf7 16.Qh8 Qg8 17.Qg8 Kg8 18.Rc1+–) 15.Qf6 Kg8 16.e4 h6 17.Bc4 Kh7 18.Be6!! Qe7 (18...Qe6 19.Qg7) 19.Qf5 1–0. pcmvr – pushtiu (2170), net–chess.com, 2014.

5.Nc3 Qf5

6.g3 Bb4?? 7.Bh3+– Qc5 (7...Qg6 8.Bc8 Nc6 9.Bb7+–) 8.Bc8 Bc3 (8...Qc6 9.a3 Ne7 10.ab4 Nc8+–) 9.Bc3 f6 (9...Nd7 10.Bb7 Rb8 11.Bg7 Rb7 12.Bh8 Ngf6+–) 10.Bb7 Ne7 (10...Nc6 11.Ba8 Nge7 12.Qb3+–) 11.Ba8 0–0 (11...Nbc6 12.Qb3 Kd7 13.Bc6 Qc6 14.Nh3+–) 12.Qb3 Kh8 13.Be4 Nbc6 14.Nf3 f5 15.Rc1 Qd6 16.Bc6 Nc6 17.Ng5 Ne5 18.Be5 Qe5 19.Nf7 Rf7 (19...Kg8 20.Nh6 Kh8 21.Qg8 Rg8 22.Nf7) 20.Qb8 1–0. pierre – trafalqar, internet, 2010.

6.g3 Nc6 7.b5 Bc5+=.

6.g4 Qg4? 7.Bh3 Qg6 8.Bc8+–.

6.g4 Qg6 7.Qb1 Bb4 (7...e3 8.Qg6 ed2 9.Kd2 hg6 10.Nd5=) 8.Qe4 Be7 9.g5 Bf5?? (9...f5 10.Qe3 c6+= (10...Qg5? 11.Nd5 Na6 12.Qg5 Bg5 13.Bg7+–)) 10.Qb7+– Qc6 (10...Qb6 11.Bg2 c6 12.Qa8 Qb2+–) 11.Bg2 Qb7 12.Bb7 1–0. pierre – george exupe, internet, 2009.

3.c4 f5

4.a3 Nf6 =.

4.Nc3 Nf6 5.a3 c6 6.d4 d5 7.e3 Be6 8.c5 Be7 9.f3 0–0 10.Nge2 ef3 11.gf3 Nh5 12.Ng3 Bh4 13.Kf2 f4–/+ 14.ef4 Rf4 15.Bc1 Rf7 16.Be2 Qc7 17.Bd2?? Ng3–+ 18.hg3 Qg3 19.Ke3 Bg5 20.Kd3 Bf5 21.Ne4 Be4 22.Kc3 Bf3 23.Bd3 Bd1 (24.Rad1 Bd2 25.Rd2 g6–+) 0–1. thotares (1620) – ranzpendang, internet, 2007.

4.Bd4 Bb4? 5.Bg7 d5 6.cd5 +–.

4.Bd4 Nc6 5.Bc3 Nb4 –/+.

4.e3 (--> 3.e3 f5 4.c4).

3.c4 Nf6

4.a3 a6 5.Nc3 b6 6.g3 Bb7 7.Bg2 Be7 8.Nh3 0–0 9.0–0 Qc8 10.Qc2 d6 11.Nf4 Nbd7 12.Nfd5 Nd5 13.Nd5 Bd5 14.cd5 Bf6 15.Bf6 Nf6 16.Be4 Ne4 17.Qe4 Re8 18.Qf3 Qh3 19.Rfc1 Re7 20.Rc6 Rae8 21.e3 h5 (21...Qc8+–) 22.Rac1 Rc8 23.R1c4 g6 24.Qf6 Qd7 25.Rd6!! cd6 (25...cd6 26.Rc8 Double attack; 25...Qd6 26.Qd6 Combination) 26.Rc8 Qc8 27.Qe7 Qc1 28.Kg2 Qd2 29.Qd6 Qd3 30.Qe5 Qa3 (30...Qb5+–) 31.d6 Qa4 32.b5! ab5 (32...Qb5 33.Qb5 Combination; 32...ab5 33.Qe8 Double attack) 33.Qe8 Kg7 34.d7 h4 35.d8Q 1–0. pierre – munkhtr, internet, 2012.

4.Qa4 c6 5.a3 d6 6.f3 ef3 7.Nf3 Bd7 8.Qc2 Be7 9.e3 0–0 10.Be2 d5 11.cd5 cd5 12.0–0 Na6 13.Ba6 ba6+= 14.h3 Bb5= 15.Re1 Rc8 16.Qb3 Ne4 17.Nc3 Nc3 18.Bc3 Bc4 19.Qb2 f6 20.Nd4 Qd6 21.Qc2 Kh8? 22.a4+/– Qb6 (22...Qb6 23.d3 Bb4 24.Bb4 Qb4 25.dc4 dc4+–) 1–0. minn (2000) – supertimchan (2075), net–chess.com, 2004.

4.Qb3 c5 5.b5 b6 6.Nc3 Bb7 7.Nh3 d5 (7...Bd6!?=) 8.cd5+= Bd5 (8...Bd6!?+=) 9.Nd5+/– Qd5 10.Bf6 (better is 10.Qd5!? Nd5 11.g4+/–) 10...Qb3+= 11.ab3 gf6 12.Nf4 Bd6 13.Nd5 Be5 14.Ra4 (14.Ra4 Nd7 15.g3+–) 1–0. Hort – Roggensack_Hanspach, simultan, 1990.

4.Qb3 Nc6 5.a3 d6 6.e3 Be6 7.b5 Ne5 8.Be5 de5 9.Nc3 Bc5 10.Nge2 Bf5 11.Ng3 Bg6 12.Qc2 Qe7 13.Nge4 Ba3 14.Nf6 gf6 15.Qa4 Bc5 16.Nd5 Qd6 17.Be2 (better is 17.b6!? Kf8 18.bc7+/–) 17...0–0 18.0–0 c6 19.bc6 bc6 (19...Qc6? 20.Qc6 bc6 21.Nf6 Kg7 22.Nd7+–) 20.Nc3 a5 21.Rfd1 Rfb8 22.Bf3 Ra6 23.Ne4 Qe7 24.Nc5 Qc5 25.d4 Qb4? (better is 25...Qe7!?+/–) 26.Bc6+– ed4 27.Qb4 Rb4 28.Bb5 Ra8 29.ed4 a4 30.Ra3 Bc2 31.Rda1 Bb3 32.Rb1 Kf8? (better is 32...Rd8!?+/–) 33.f3 Ke7 34.Kf2 Kd6 35.Ke3 Rc8 36.Kd2 Rcc4 37.Bc4 Rc4 38.Rab3 ab3 39.Rb3 Rd4 40.Ke3 Ra4 41.Kf2 Ke6 42.Rb5 Rh4 43.Kg3 Rh6 44.h4 Rg6 45.Kh3 f5 46.g4 fg4 47.fg4 h6 48.Kg3 Kf6 ½–½. Labahn,Thomas (1925) – Wegan,Barbara (1800), Wichern op 5th, 1999.

4.b5 d6 5.e3 Be7 6.Ne2 Nbd7 7.Ng3 (7.Nbc3 Nc5 8.Ng3 c6 9.Qc2 d5 10.cd5 cd5 11.d4=) 7...Nc5 8.Qc2 (8.Nc3 c6 9.Qc2 d5 10.bc6 bc6 11.cd5=) 8...b6 (8...d5 9.cd5 (9.Bd4 Ne6 10.Be5 0–0 11.cd5=) 9...Nd5 (9...Qd5 10.Nc3= Qe6 11.Na4=) 10.a3 Bf6 11.Qc5=) 9.Nc3 e4 seems the pivot of the position (9.Bd4 a6 10.Bc5 dc5 11.Ne4=) 9...Bb7 10.Nf5 (10.Be2 Nd3 11.Bd3+=) 10...0–0 11.Be2 Qd7 12.Ne7 Qe7 13.0–0 d5 14.cd5 Nd5 15.Nd5 Bd5 16.Rfc1 (16.Ba3 c6+=) 16...Ne6 (16...c6 17.d4 ed3 18.Bd3 Nd3 19.Qd3=) 17.Bg4 (17.d3!? f5 18.de4 fe4 19.Rd1+=) 17...f5 18.Be2 Kh8 19.g3 Rf7 20.Bh5 Rff8 21.a4 Qg5 Black prepares f4 22.Qd1 f4 23.Bg4 fg3 24.hg3 (24.fg3 Nc5 25.Ba3 Nb3 26.Bf8 Rf8=) 24...Nc5 25.Ba3 Qh6 (25...Qf6!? 26.Bc5 Qf2 (26...bc5?! 27.Qe1=) 27.Kh1 Rf6–/+) 26.Bc5 bc5 27.Qc2?? (better is 27.Qf1 Qd6 28.d3=) 27...Rf2!! 28.Kf2 (28.Kf2 Qh2 Deflection) 28...Qh2 29.Ke1 Qg3 30.Ke2 (30.Kd1 Qg4 31.Ke1 Qg1 32.Ke2 Qg2 33.Ke1 Rf8 34.Qd3 Qg1 35.Qf1 Qf1) 30...Qg4 (30...Qg2 31.Ke1 Rf8 32.Bf5 Rf5 33.Qd3 Qg1 34.Qf1 Qf1) 31.Ke1 Qg1 32.Ke2 Qg2 33.Ke1 Rf8 34.Qc4 (34.Qd3 Qg1 35.Qf1 Qf1) 34...Bc4 (34...Qg1 35.Ke2 Rf2) 35.Kd1 Bb3 0–1. Kamaletdinov,Farit (1945) – Goryainov,Mikhail (1760), 2012.

4.b5 Bb4 5.e3 0–0 6.f3 d5 7.cd5 ef3 (7...Nd5 8.Nc3+=) 8.Nf3 Bg4 (8...Nd5 9.Qb3 Re8 10.Nc3 Ne3 11.de3 Re3 12.Be2 Bc3 13.Bc3+=) 9.Be2 (9.Qb3 Bd6+=) 9...Nd5= 10.0–0 Bf3 (10...Nd7 11.Nd4 Be2 12.Qe2+=) 11.Rf3 (11.Bf3 Be7+/–) 11...Qh4 12.Rg3 Bd6?? (better is 12...g6+/–) 13.Rg7+– Kh8 14.Rg4 Qf6 15.Bf6 Nf6 16.Rh4 Be7 (16...c6 17.Nc3 Nbd7 18.bc6 bc6 19.Qc2+–) 17.Qc2 Rg8 (17...c6 18.Nc3+–) 18.Qc3 (18.Qc7 Nbd7+–) 18...Rg7 (18...c6 19.Bd3 Rg7 20.Qe5+–) 19.Rf4 (better is 19.Qc7 Nbd7+–) 19...Nd5 20.Qe5 Nf4 21.ef4 (21.Qf4 Bd6 22.Qf5 a6+–) 21...Bd6 (21...f6 22.Qf5 Nd7 23.d4+–) 22.Qe8 Rg8 23.Qf7 Rf8 24.Qh5 (24.Qd5 Nd7+–) 24...Nd7 25.g3 Bc5 26.Kg2 Nf6 (26...Bd4 27.Nc3 c6+–) 27.Qc5 Ne4 28.Qd4 (28.Qc7!? Nf6+–) 28...Nf6 29.Nc3 (29.Bf3 a6 30.Bb7 Rad8+–) 29...Rad8 30.Qe5 (30.Qa7 c6+–) 30...Rd2 31.Nd5! Kg7 (31...Rd5 32.Qc7 Combination) 32.Nf6 Rf6 33.Qe7 (33.Rd1 Re2 34.Qe2 Rg6 35.Qe7 Kh6 36.Qh4 Kg7 37.Rd7 Kf8 38.Qd8) 33...Kg6 34.Kf3 (34.Rd1 Re2 35.Qe2 Rf8 36.Qg4 Kf6 37.Qg5 Ke6 38.Qe5 Kf7 39.Rd7 Kg6 40.Qg5) 34...Rdd6 35.Qe4 Kg7 36.Bd3 (36.Bc4 Kh6 37.g4 Rd3 38.Qd3 Rg6 39.Qd8 Kg7 40.Qe7 Kh6 41.g5 Kh5 42.Qh7 Rh6 43.Qh6) 36...Rde6 37.Qh7 Kf8 38.Qh8 Ke7 39.Bc4 Rd6 40.Re1 Kd7 (40...Rde6 41.Qg7 Kd6 42.Rd1 Kc5 43.Qc7 Kb4 44.Rb1 Kc3 45.Be6 Kd2 46.Rb2 Kd1 47.Qd7 Ke1 48.Rb1) 41.Qg7 (41.Qe8) 41...Kd8 (41...Kc8 42.Re8 Rd8 43.Qg4 Rf5 44.Qf5 Kb8 45.Rd8) 42.Qe7 (42.Qg8 Rf8 43.Qf8 Kd7 44.Re7) 42...Kc8+– 43.Qe8 (43.Bf1 a6 44.Qe8 Rd8 45.Bh3 Kb8 46.Qd8 Ka7 47.Qf6 ab5 48.Qd4 Ka6 49.Re8 b6 50.Ra8 Kb7 51.Qd5 c6 52.Qd8 b4 53.Qc8) 43...Rd8 44.Qe7 (44.Be6 Re6 45.Qe6 Kb8 46.Qd7 Rc8 47.Re8 a6 48.Rc8 Ka7 49.Qc7 ab5 50.Qa5) 44...Rfd6?? (44...Rdd6 45.Bf1 a6 46.Qe8 Rd8 47.Bh3 Kb8 48.Qd8 Ka7 49.ba6 Rd6 50.Qc7 Rd3 51.Ke4 Rb3 52.ab3 Ka6 53.Bf1 b5 54.Ra1) 45.Be6+– Kb8 46.h4 (46.Rc1 Rd3 47.Ke2 Rd2 48.Ke1 Rg8 49.Qc7 Ka8 50.Qc8 Rc8 51.Rc8) 46...Rd3 47.Re3 R3d6 48.h5 (better is 48.Rc3 Rd3 49.Rd3 Rd3 50.Ke2 a6+–) 48...a6 49.ba6 ba6 50.Rb3 Ka7 51.Bf5 (51.Qc7 Ka8 52.Qb7) 51...a5 (51...Rc8 52.Bc8 Rc6 53.Qe3 Rb6 54.Rb6 Ka8 55.Qe4 c6 56.Qc6 Ka7 57.Qb7) 52.Qe3 (52.Qc7 Ka6 53.Qb7) 52...Rd4 53.Be4 c5 Plans Qc1 54.Rb7 (54.Qc3 R8d6 55.Qc5 Ka6 56.Bb7) 54...Ka6 55.Qb3 a4 (55...Rd3 56.Bd3 Rd3 57.Qd3 Kb7 58.Qd5 Kc7 59.Qc5 Kb7 60.h6 a4 61.h7 a3 62.h8Q Ka6 63.Qhc8) 56.Qb6 1–0. GuestKVBT – sirbastl, freechess.org, 2017.

4.b5 Be7 5.Nc3 0–0 6.Qc2= e3 7.de3+= d6 8.g3 Be6 9.Bg2 c6 10.Ne4 Ne4 11.Be4 Bd7? 12.Bh7+– Kh8 13.a4 Bf6 14.Be4 Bb2 15.Qb2 Qf6? 16.Qf6 gf6 17.Rd1 f5 18.Bg2 a6 19.Rd6 ab5 20.ab5 Ra1 21.Rd1 Rd1 22.Kd1 cb5 23.cb5 Bb5 24.Bb7 Rd8 25.Ke1 Ba4 26.Kf1 Nc6 27.Nh3 Rd1 28.Kg2 Rh1 29.Kh1 Kg7 30.Bc6 Bc6 31.Kg1 Kf6 32.Kf1 (32.Kf1 Ke5 33.Nf4+–) 1–0. pumpkin – skoll, net–chess.com, 2000.

4.Qc2 Bb4 5.Nc3 Qe7 6.Nd5 Nd5 7.cd5 0–0 8.a3 (8.Qc7 Qg5 9.Qc2 Qd5 10.Bg7 Qd2 11.Qd2 Bd2 12.Kd2 Kg7–/+) 8...Bd6 (8...Ba5 9.e3–/+) 9.Rc1 (9.f3 f5–/+) 9...c6 (9...Ba3 10.Ba3 Qa3 11.Qc7–+) 10.e3 (10.Qc3 f6–/+) 10...cd5 (10...Ba3!? 11.Ba3 Qa3 12.Ne2–+) 11.Ne2–/+ Nc6 (worse is 11...Ba3 12.Ba3 Qa3 13.Qc8=) 12.Nd4 (12.Qb3!?–+) 12...Nd4 (12...Ba3?! 13.Nf5 Qb4 14.Bg7–/+) 13.Bd4 Ba3 14.Rb1 (14.Ra1 a6–+) 14...b6 15.Qc3 f6 16.Be2 (16.Qb3 Bb7–+) 16...Bc5 (16...Bd6 17.d3–+) 17.0–0 (17.Bc5 Qc5 18.Qb3 Kh8–+) 17...d6 18.f3 Be6 19.fe4 (19.Ba6 f5–+) 19...de4 20.Rf4 (20.Ba6 Ba2 21.Rb2 Bf7–+) 20...d5 21.Rbf1 (21.Bc5 bc5 22.d3 ed3 23.Bd3 c4–+) 21...Bd4 (21...Bd6 22.Rh4–+) 22.Qd4 Rac8 (22...Qc5 23.Qa4–+) 23.d3 (23.Qb2 Qc5–+) 23...f5 (23...Rc2 24.Re1–+) 24.de4 (24.R4f2 Rc2–+) 24...de4 25.Qe5 (25.Ba6 Rc2 26.Qe5 Rc5–+) 25...Rc5 26.Qb2 Rfc8 (26...Qf6 27.Qb1–+) 27.Ba6 R8c7 28.Qd4 (28.Rd1–+) 28...Rd5 29.Qb2 Qc5 (29...Ra5!? 30.Ra1 Qc5 31.Ra5 Qe3 32.Kh1 Qc1 33.Qc1 Rc1 34.Rf1 Rf1 35.Bf1 ba5 36.Bb5–+) 30.R4f2 (30.Qe2 b5–+) 30...Qe3 31.Kh1 Qc3 (31...Qd4 32.Qb1–+) 32.Qa2 (32.Qe2 Qd4 33.Qh5 Re7–+) 32...Rd6 (32...Qc6 33.Be2 e3 34.Rf4–+) 33.Qa4 (33.Rf5 g6 34.Rf8 Kg7 35.Qf2–+) 33...g6 (33...Rd8!? 34.Qb5–+) 34.Qe8 Kg7 35.Bb5 Bf7 (35...Qf6 36.Ba6–+) 36.Qb8 Rd5 37.Ba4 (37.Ba6 Rcd7–+) 37...Rdc5 38.Rc2 (38.Bd1–+) 38...Qd3 (38...Qd3 39.Rfc1 Rc2 40.Bc2 Qd2–+) 0–1. DEFFM – reforming, freechess.org, 2016.

4.Bc3 d5+= 5.e3 Be7 6.cd5 Nbd7 (6...Qd5 7.d3+=) 7.Qb3 0–0 Black fights for the Initiative 8.Qc2 (8.Bd4!?=) 8...Nb6–/+ 9.d3 Nbd5 10.a3 Bf5 (10...Nc3?! 11.Nc3 c5 12.bc5 ed3 13.Bd3 Bc5 14.Nge2=) 11.d4 a5 12.b5 Qd7 13.Bc4 c6 14.Qb2 Nb6 15.Be2 (15.bc6 bc6 16.Nd2 Nc4 17.Nc4 Rfb8–/+) 15...Nfd5 16.bc6 bc6 17.h3 Na4 18.Qc2 Rfb8 19.Bd2 c5 20.Nc3 (20.g4 Rb2 21.Qd1 Be6–+) 20...Nac3 21.Bc3 Rc8 22.Qd2 (22.Bc4 cd4 23.Bd4 Qc6–+) 22...Nc3 23.Qc3 Bf6 24.Rc1 (24.Qb2 cd4 25.Bb5 Qd5 26.ed4 e3 27.fe3 Rc2 28.Qc2 Bc2–+) 24...cd4 25.Qd2 d3 26.Bd1 Rc1 27.Qc1 Rc8 28.Qd2 Plans Ne2 28...Bc3 (28...Bc3 29.g4 Qc6–+) 0–1. Nittschalk,Karl – Luzuriaga,Norberto Horacio, 1. B4 Thementurnier, 2000.

4.c5 Na6 5.a3 b6 (5...d6 6.c6=) 6.cb6 ab6 7.e3 (7.d3 e3 8.fe3 Ng4=) 7...Bb7 (7...d5 8.d3 Bg4 9.Be2 Be2 10.Ne2=) 8.Nc3 Bd6 (8...c5 9.b5 Nc7 10.d4+=) 9.Bc4 (9.d3 ed3 10.Nb5 Be7=) 9...0–0 (9...Be7 10.d3 d5 11.Ba6 Ba6 12.b5+=) 10.Nh3 (10.d3 ed3 11.Nf3 d2 12.Qd2 Qe7+=) 10...c5 (10...Be7 11.d4+=) 11.bc5 (11.b5 Nc7+=) 11...Bc5 (11...Nc5 12.0–0–/+) 12.0–0 d5 13.Be2 d4 14.Nb5 de3 (14...d3 15.Bg4–/+) 15.fe3 (15.de3 Qe7=) 15...Bc6 (better is 15...Be7!?+=) 16.Bf6+= gf6 17.Bc4 Re8 (17...Kh8 18.Qc2+=) 18.Qg4 (18.Qh5 Rf8 19.Rf4 Qd2 20.Ng5 Qe3 21.Kh1+–) 18...Kf8?? (better is 18...Kh8 19.Qh4 Rg8 20.Qf6 Qf6 21.Rf6 Nb8 22.Rf7 Ra4+/–) 19.Qh5+– Kg8 (19...Re7 20.Qh7 Ke8 21.Rf6 Bd5 22.Qh8 Kd7 23.Qd8 Rd8 24.Bd5 Nc7+–) 20.Ng5! (20.Bf7?! Kh8 21.Be8 Be8+–; 20.Qf7?! Kh8 21.Qf6 Qf6 22.Rf6 Bb5 23.Bb5 Re5+–) 20...fg5 (20...Qd5 21.Rf6 Be3 22.de3 Ra7 23.Na7 Qg5 24.Qg5 Kh8 25.Rf7 Rg8 26.Qe5 Rg7 27.Qg7) 21.Rf7 1–0. Wall,Bill – MWR, internet, 2005.

4.c5 b6 5.cb6 ab6 (5...Bb4 6.Qb3 Qe7 7.a3 (7.bc7?! Na6=) 7...Bd2 8.Nd2 ab6 9.Qg3+–; 5...cb6?! 6.a3+=) 6.b5 Ra5 7.Nc3 Bc5 8.e3 0–0 9.Be2 (9.d3 Bb7+=) 9...d5 10.d4 Bb4 11.Qb3 c5 12.Nh3 (12.dc5!? Bc5 13.Na4+=) 12...Bh3–/+ 13.gh3 Qe7 (13...Bc3!? 14.Qc3 c4–/+) 14.dc5+= bc5 15.a3 c4?? (better is 15...Bc3 16.Qc3 Ra8=) 16.Qb4+– Qb4 17.ab4 Ra1 18.Ba1 Nbd7 19.Bb2 Rb8 20.Kd2 Nb6 21.Ra1 Rd8 (21...Rb7 22.Na4 Na4 23.Ra4+–) 22.Na4 Na4 23.Ra4 h6 24.Be5 Nh5 (24...Re8 25.Bc7 Nd7+–) 25.Bh5 g6 (25...Re8 26.b6 Re5 27.b7 Rh5 28.b8Q Kh7 29.Qf4+–) 26.Be2 Rd7 (26...c3 27.Kc3 Rc8 28.Kd4 f6 29.Bf6 Kf7+–) 27.Ra8 Kh7 (27...Rd8 28.Rd8 Kh7 29.Rh8) 28.Rh8 1–0. pierre – oppojso, internet, 2010.

4.c5 d5 5.d3 Be7 6.e3 0–0 7.Ne2 ed3 8.Qd3 c6 (8...b6 9.Bf6 Bf6 10.Nbc3–/+) 9.Nf4 Ne4 10.Nd2 Nd2 11.Qd2 Bf6 (11...a5 12.a3=) 12.Bd3+= Bb2 13.Qb2 g6 14.0–0 Nd7 15.Rad1 Qf6 16.Rd2 ½–½. Christensen,Oddbjorn – Andreassen,Tor Herman (1640), Host Monrad, 2004.

4.c5 d6 5.Bf6 (5.Qc2 dc5 6.bc5 Na6–/+) 5...Qf6–/+ 6.Nc3 dc5 (6...Qe5 7.Rc1–/+) 7.Ne4+= Qe5 (7...Qd4 8.Nc5 Qb4 9.Nd3+=) 8.Nc5= Bc5 9.bc5 Nc6 (9...Qc5!? 10.e3 0–0=) 10.Rc1+= Be6 11.Nf3 Qf6 12.a3 (12.Qc2 Bd5+=) 12...0–0–0 13.Qc2 g5 (13...Bd5 14.Qc3 Qg6 15.Qb2+=) 14.Qc3 Qf4 (14...Qe7 15.h3+=) 15.e3+/– Qf5 16.d4 (16.Bb5 Bd5 17.Bc6 Bc6+/–) 16...Bd5 17.Nd2 (17.Qc2 Be4 18.Qd1 Rhe8=) 17...h5 (17...Rhe8 18.f3+=) 18.Bd3 (18.h4 Qg4 19.hg5 h4+/–) 18...Qe6 (18...Qg4!? 19.Rg1 Rhe8+/– (19...Bg2? 20.Bf1+–)) 19.0–0+/– f5 20.Qb2 (20.Rb1 h4+–) 20...g4 (20...Ne7 21.Rb1+/–) 21.Rb1 b6 (21...Ne7 22.Rfe1+/–) 22.cb6 (22.Rfe1 Kd7+–) 22...cb6 23.Qc2 h4?? (better is 23...Rhf8+–) 24.Bf5 (24.Bf5 Kb7 25.Be6 Be6 26.Rfc1+–) 1–0. Wall,Bill – AChessPlayer, internet, 2006.

4.c5 Be7 5.Nc3 b6 6.cb6 cb6 7.b5 d5 8.e3 Nbd7 9.Na4 (9.d3 0–0+=) 9...0–0 10.Ne2 Nc5 The mate threat is Nd3 11.Nc5 (11.Nd4 Bd7+=) 11...bc5–/+ 12.Bc3 Bg4 13.Qa4 Bd7 14.Qb3 Rb8 15.a4 a6 16.Nf4 (16.Be5!? Rb6 17.Nc3–/+) 16...c4–+ 17.Qb2 ab5 18.a5 b4 19.Bd4 c3 (better is 19...Ra8!? 20.a6 Bg4–+) 20.Qb3 (20.dc3 bc3 21.Qc2 Rb2+=) 20...Bc6 (20...cd2 21.Kd2 Bb5 22.a6 Bf1 23.Rhf1+=) 21.Bb6 (21.dc3 bc3 22.Qc2 Qc7=) 21...Qc8 (better is 21...cd2!? 22.Kd2 Rb6 23.ab6 Qb6–/+) 22.dc3= Nd7 23.cb4 (23.Bd4!? bc3 24.Qc2= (24.Qc3?? Bb4–+)) 23...Nb6–/+ 24.ab6 Rb6 25.b5 Qd7?? (better is 25...Rd8–/+) 26.bc6+– Bb4 (26...Qc6 27.Nd5 Rb7+– (27...Rb3?? 28.Ne7 Kh8 29.Nc6+–)) 27.Qb4! Qc6 (27...Rb4 28.cd7) 28.Qd2 (28.Nd5!? Rb4 29.Ne7 Kh8 30.Nc6 Rb2+–) 28...Rfb8 29.Rd1 (29.Nd5 Rb1 30.Qd1 Rd1 31.Rd1 Kf8–/+) 29...Rb2 30.Qc1 (30.Nd5 Qa4 31.Qc1 Rc2+–) 30...Rc2 Threatening mate... how? 31.Nd5 (31.Qa3 Rc5+–) 31...Kh8 (31...Rc1 32.Ne7 Kf8 33.Nc6 Rc6+–) 32.Qa3 h6 33.Nb4 Qc4 (33...Qc3 34.Qc3 Rc3+–) 34.Bc4 (34.Bc4 Rc4 35.Rd4 Rd4 36.ed4+–) 1–0. Riveline – Antonni,D, Val Thorens, 1993.

4.e3 Bb4 5.Qb3 Bc5 6.Ne2 0–0 7.Ng3 b6 8.Bf6 Qf6–+ 9.Nc3 Bb7 10.Be2 Re8 11.0–0 Qe6 12.d3? ed3–/+ 13.Bd3 Nc6 14.Rfe1 Qg4 15.h3 Qg5 16.Nce4 Qe5 17.Nc5 Qc5 18.Qc2 g6 19.e4 Nb4 20.Qc3 Nd3 21.Qd3 Re7 22.e5? Re5 23.Re5 Qe5 24.Qd7?? Qa1 (24...Qa1 25.Kh2 Rc8–+) 0–1. gtate (1960) – rpatru (2100), net–chess.com, 2006.

4.Bf6 Qf6 5.Nc3 Qg6 (5...Qe5 6.b5 a6 7.e3 ab5 8.f4=) 6.Qb1 (6.b5 Bd6=) 6...f5+= 7.e3 a5 (7...Nc6 8.b5 Ne5 9.Nh3+=) 8.b5= Bd6 9.Nge2 0–0 10.Nd5 Qf7 (10...c6 11.Nef4 Qh6 12.c5=) 11.Qb2 b6 12.h4 Bb7 13.Nef4 Bf4 14.Nf4 d6 15.Rc1 Nd7 16.Be2 Nc5 17.Qd4 a4 18.f3 a3 19.fe4 fe4 20.0–0 Qe7 21.g3 Qe5 22.Bg4 Rae8 23.Rc3 g5 24.Qe5 de5 25.Nd5 Rf1 26.Kf1 Bd5 27.cd5 gh4 28.gh4 Ra8 29.Be2 Kf7 30.Ke1 Ke7 31.d4 (31.Kf2!?=) 31...ed3–/+ 32.Bd3 e4 (32...Nd3 33.Rd3 h5 34.Rc3–/+) 33.Bc2 (33.Bc4!?=) 33...Kd6–/+ 34.Rc4 (34.Bb3 Nb3 35.Rb3 Kd5–/+) 34...Ke5 35.Kd2 Rg8 36.Bd1 Rd8 37.Rd4? (better is 37.Kc3!?–/+) 37...Rd5–+ 38.Kc3 Nd3 (38...Nb7 39.Rd5 Kd5 40.h5–+) 39.Rd5 (39.Bc2 Nf2 (39...Rb5? 40.Re4 Ke4 41.Bd3 Kf3 42.Bb5+–) 40.Rb4 h6–/+) 39...Kd5 40.Bb3 (40.Bh5!?–/+) 40...Kc5–+ 0–1. Bulcourf,Carlos (2015) – Garnier,Rene (2110), Villa Martelli ARG, 2014.

4.a3 a5

5.Qa4 Nc6 =+.

5.ba5 Ra5 6.e3 d5 7.Bc3 (7.cd5 Nd5 8.d3 Bf5=) 7...Ra8 8.Qc2 Be6 9.cd5 (9.Ne2 Bd6+=) 9...Bd5 10.Be2 (10.Bb2 Bc6+=) 10...Nbd7 11.f4 (11.Nh3 Nc5–/+) 11...Nc5 (11...Bd6 12.Nh3–/+) 12.Nh3 Nd3 13.Kf1 Be7 (13...Bc6 14.Bd4–/+) 14.Nf2 Nc5 15.Be5 (15.d4 Nb3 16.Ra2 0–0–/+) 15...0–0 16.Nc3 Be6 (16...Bb3 17.Qb2 Be6 18.Rd1–/+) 17.Nb5 (17.Nce4 Nfe4 18.Ne4 Ne4 19.Qe4 Ra3=) 17...Bb3–/+ 18.Qb2 c6 19.Nd4 Bd5 20.Nf5 Nb3 21.Ne7 Qe7 22.Rb1 (22.Rd1 Rfd8–/+ (worse is 22...Qa3 23.Bf6 gf6 24.Qf6=; worse is 22...Ra3 23.Bf6 gf6 24.Ng4+=)) 22...Qa3 (22...Ra3 23.d3 Rfa8 24.Bf6 Qf6 25.Qf6 gf6 26.Rd1–+ (26.Ne4? Be4 27.de4 Nd2 28.Kf2 Ne4 29.Kg1 Nc3–+)) 23.g4 (23.Qc3!?+=) 23...Qb2 (23...Nd7 24.Bc3–+) 24.Rb2 Nd7 25.Bc3 Ndc5 26.Kg2 b5 27.Bb4 (27.Rhb1 Rfb8–+) 27...Ra4 28.Bc5 Nc5 29.Rc1 Nb3 30.Rc3 (30.Rc3 Na5 31.Rc5–/+). Wisniewski,Jan – Litke,Slawomir, corr 2AMM Poland, 1993.

5.Qb3 Na6! 6.ba5 Nc5 7.Qc2 d6 8.e3 Bf5! 9.Nf3 Bd7! 10.Nd4 Ba4 11.Qc3 Ng4! –/+. Forgacs – Forintos, Hungary, 1981.

5.Qb3 d5+= 6.e3 Be6 (6...ab4 7.ab4 Ra1 8.Ba1+=) 7.d3 (7.ba5 Nbd7 8.Bd4 dc4 9.Qb7 Bd5=) 7...ab4 8.ab4 Ra1 9.Ba1 Nc6 (9...dc4 10.dc4 Na6 11.Bc3+=) 10.Bc3 (10.de4 Ne4 11.c5 Qh4–/+) 10...ed3–/+ 11.Bd3 dc4 (11...Qe7 12.b5 Nb4 13.Be2+=) 12.Bc4+= Bc4 13.Qc4 Qd5 14.Qd5 Nd5 15.b5 Na7 (15...Nc3?! 16.Nc3 Bb4 17.Nge2=) 16.e4 (16.b6 Nb6 17.Nf3 c5–/+) 16...Nc3 17.Nc3 Bb4 18.Nge2 Nb5 19.Kd2 Ke7 20.Kc2 Nc3 21.Nc3 Bc5 (21...Bc3 22.Kc3 c6 23.Rb1–/+) 22.Rb1 Bf2 (22...Rb8 23.Nd5 Kd6 24.Rd1–/+) 23.Rb7 Kd6 24.e5 Kd7 25.Rb1 Ke6 26.Ne4 Bh4 27.Nd2 Ra8 28.Nf3 Be7 29.Kd3 Ra6 30.Kc4 (30.Rb8 Ra2 31.g4 h6–/+) 30...Ra2 31.g3 Ra3 32.Rf1 c5 33.h3 h5 34.Kb5 g5 35.g4 hg4 36.hg4 Rb3 37.Kc6 Rd3 (37...Rb4 38.Rh1 Rg4 39.Rh6 Kf5 40.Kd7–/+) 38.Nh2 (38.Kb5 Kd5 39.Ne1 Rb3 40.Ka4 Rb4 41.Ka3 Rg4 42.Rf7 Ke6–+) 38...c4 (better is 38...Rh3 39.Rf2 c4–+) 39.Rc1? (better is 39.Kb5–+) 39...c3 40.Kb5 Kd5 41.Nf1 Bc5 (41...Ke5?! 42.Re1 Kd6 43.Kc4–+) 42.Nh2 Rd2 43.Rc3 Rb2 (43...Rb2 44.Ka4 Rh2–+; 43...Rh2?! 44.Rc5 Ke6 45.Kb4–/+) 0–1. Schulz,Hans_Juergen – Perlitz,Heiko, TT–11 ETC, 2004.

5.b5 b6 (5...d5 6.cd5 Nd5 7.Qc2=) 6.e3 Bb7 7.Nc3 (7.d3 Bc5=) 7...d6 (7...Be7 8.d3=) 8.g3 (8.d3!?+=) 8...Nbd7+= 9.Nh3 (9.Be2 Be7+=) 9...Ne5 (9...Be7 10.Be2+=) 10.Be2= Nfd7 (10...Be7 11.0–0=) 11.Nf4 (11.Nd5 Nc5 12.Nhf4 Be7=) 11...Nc5 (11...Be7 12.0–0=) 12.0–0 Ncd3 (12...Be7 13.Ncd5=) 13.Bd3 ed3 14.Ncd5 Rc8 (14...Be7 15.e4+=) 15.Rc1 (15.Qh5 g6 16.Qd1 Bg7 17.Nd3 0–0 18.Ne5 de5+=) 15...Be7 (15...h5 16.h4+= (worse is 16.Nh5 Qg5 17.Nhf4 Qh6=)) 16.f3 (16.Nh5 Rg8 17.e4 Bd5 18.ed5 g6+/–) 16...0–0 (16...Bf6 17.Kg2+=) 17.Qb3 Qe8 (17...c6 18.bc6 Bc6 19.Bd4+/– (19.Qb6?! Nf3 20.Rf3 Qb6 21.Nb6 Bf3=; worse is 19.Nb6 Rb8 20.Bd4 Nf3 21.Rf3 Bf3–/+; 19.Nd3?! a4 20.Ne7 Qe7+=; 19.Ne7?! Qe7 20.e4 Bb7+=)) 18.Nd3+/– a4 (18...Bd5 19.Ne5 Bb7 20.Nd3+/–) 19.Qc3 Bd5 20.cd5 (20.Ne5 f6 21.cd5 fe5+–) 20...Qb5 21.Nb4 (worse is 21.Ne5 de5 22.f4 Qd5 23.Qe5 Qe5 24.fe5 c5+=) 21...Bf6 22.d4 Nd7 23.e4 Nb8 24.Rc2 Qd7 (24...Rfe8 25.Rb1+=) 25.e5 (25.Nc6!?+/–) 25...Be7+= 26.f4 (26.Nc6 de5 27.Ne7 Qe7 28.de5 Qd7+=) 26...de5= 27.de5 (better is 27.fe5!? Bb4 28.Qb4 Qd5 29.Qa4=) 27...Bc5–/+ 28.Kg2 Bb4 29.Qb4 Qd5 30.Kg1 Rfd8 (30...Qd3 A) 31.Qa4?? b5 32.Rc3 Qc3 (32...ba4?! 33.Rd3 Rfd8 34.Rc3+=) 33.Qb5 Qe3 34.Rf2 Rfd8–+; B) 31.Rfc1+=) 31.Qa4 c5 (31...b5 32.Qb4+=) 32.Qb5= Nc6 (32...Nd7 33.a4=) 33.Qb6 Nd4 34.Bd4 Qd4 35.Rff2 (35.Rcf2 Rb8 36.Qc6 c4=) 35...Qe4 36.Qb1 (36.Rc5? Rd1 37.Rf1 Qd4 38.Kg2 Rc5–+) 36...c4 37.Qc1 Rd3 Black plans c3 38.Rc3 Rcd8 39.Rd3 Rd3 40.Rc2?? (40.Qc2 Qd5 41.Re2 Ra3+=) 40...Qd4 (40...Qf3 41.Rb2 Rd1 42.Qd1 Qd1 43.Kg2 g5 44.Rb8 Kg7–+) 41.Kg2= c3 42.Kh3?? (42.Qb1 g5 43.f5 (43.fg5 Qe4 44.Kh3 Qf5 45.Kg2 Qf3 46.Kh3 Qh5 47.Kg2 Rd2 48.Rd2 cd2–+) 43...Qe5 44.Qb7 Qf5 45.Rf2 Qd5 46.Qd5 Rd5 47.Kh3–+) 42...Rd1 (better is 42...Qd7 43.f5 Qf5 44.Kg2 Qf3 45.Kh3–+) 43.Qd1 Qd1 44.Rc3 Threatening mate... how? 44...h5 (44...Qd7 45.g4 h5 46.Rg3–+) 45.Rc7 (45.Rc8 Kh7 46.Rc7 Qg4 47.Kg2 Qe2 48.Kh3 g5 49.fg5 Kg6 (worse is 49...Qe5 50.Rf7 Kg6 51.Rf4–+) 50.Rc6 Kg5–+) 45...Qg4 46.Kg2 h4 (better is 46...g5 47.fg5 Qe2 48.Kh3 Qe5 49.Rc8 Kg7 50.Rd8–+) 47.Rc2 (47.Rc3 h3 48.Kf2 Qd1 49.Rc8 Kh7–+) 47...h3 (better is 47...g5!? 48.Kf2–+) 48.Kf2 Qd1 49.Re2 Qd4 (49...Kf8 50.Kf3–+) 50.Kf3 g6 (50...Kf8 51.a4–+) 51.Rf2 (51.Kg4 Qd7 52.Kf3 g5–+) 51...Kf8 52.Re2 Ke7 (52...Qd3 53.Re3 Qd5 54.Re4–+) 53.Rf2 (53.Kg4 Qd7 54.Kf3 Qb7 55.Ke3 Qa7 56.Ke4 Qa4 57.Ke3 Qa3 58.Kd2 Qb3–+) 53...Ke6 (53...Qd5 54.Ke3–+) 54.Re2 Qd3 55.Kf2 Kf5 (55...Qa3!? 56.Ke1–+) 56.a4 Kg4 57.a5 Qd4 58.Re3 Qd2 (58...Qd5 59.Re2–+) 59.Re2 Qa5 60.Rc2 (60.Re3 Qa7 61.e6 fe6–+) 60...Qb6 (60...g5 61.fg5 Qe5 62.Kf1–+) 61.Ke2 Qg1 (61...Qb3 62.Kd2 Kf3 63.Rc3 Qc3 64.Kc3=) 62.Kd2 (62.Kd3–+) 62...Kf3 (62...Kf3 63.Kd3 Qd1 64.Kc3 g5 65.fg5 Qe1 66.Kc4 Qe5–+; better is 62...Qh2 63.Kc1 Qh1 64.Kb2 h2–+) 0–1. Neuhof,KE – Assenyev,KK, corr ICCF EU/M/GT/034 (year?).

5.b5 b6 6.e3 Bb7 7.Ne2 d5 8.d3 Bd6 idea 0–0, Re8, Nbd7, Rc8 (Roggensack).

5.e3 ab4–/+ 6.ab4 Ra1 7.Ba1 Bb4 8.Bc3 Be7 9.d3 Nc6 10.de4 Ne4 11.Nf3 Nc3 12.Nc3 Bb4 13.Qc2 Qf6 14.Qe4?? Ne7 (14...Ne7 15.Bd3 Qc3 16.Kd1 Qa1 17.Bb1 d6–+) 0–1. M8IN3 – ASMAR46, Live Game Caissa's Web, 2005.

5.b5 Bc5

6.d4 ed3 7.e3 0–0 8.Bd3 d6 9.Nf3 Bg4 10.h3 Bh5 11.Nbd2 Nbd7 12.Qc2 Qe7 13.0–0 Rfe8 14.Ng5 Bg6 15.Ndf3?? (better is 15.Bg6 fg6 16.Rad1=) 15...Bd3–+ (15...Bd3 16.Qd3 h6–+) 0–1. marekt – Phalanx_XXII, internet simul, 2013.

6.e3 0–0 7.Nc3 d6 8.Qc2 Bf5 9.Nge2 Re8 10.f3 Bg6 11.Nf4 ef3 12.Ng6 f2 13.Kd1 (13.Kf2 fg6 14.Be2 Ng4 15.Bg4 Qh4 16.Kg1 Qg4+=) 13...hg6 (13...fg6!? 14.Be2 d5 15.cd5 Qd6= (15...Nd5? 16.Nd5 Bd6 17.Rf1+–)) 14.Be2= d5 15.cd5 Nd5 16.Nd5 Qd5 17.Bf3 Qd6 (17...Qg5!?+=) 18.Qc3+/- f6 19.Bb7 Ra7 20.Qc4 Kf8 21.Bd5 Nd7 22.a4?? (better is 22.Bg8 Ke7 23.Ke2+=) 22...Nb6–+ 23.Qc5 Qc5 24.Ba3 Qa3! 25.Ra3 Nd5 26.Rf1 Re4 27.Rf2 Nb6 28.Rf4 Rf4 29.ef4 Ra8 30.Kc2 Rd8 31.Rc3 Rd7 32.Kb3 Ke7 (32...Rd2 33.Rc7 Rd4 34.Ra7 Ra4 35.Kc2–+) 33.Re3 (33.h3 Kd8 34.Rg3 Rd2 35.Rg6 Rd4 36.Rg7 Ra4–+) 33...Kf7 (33...Kd8 34.Rg3–+) 34.Rc3 Ke6 35.g4 Kd5 36.Re3 Kc5 37.Re6 Kd4 38.g5 Rf7 (38...Kd3 39.gf6 gf6 40.Rf6–+) 39.h4 (39.Re8 fg5 40.Rd8 Nd5 41.fg5 Rf3 42.Kc2 Ra3–+) 39...Kd3 40.gf6 gf6 (40...Rf6 41.Rf6 gf6 42.f5 gf5 43.h5–+) 41.Re3 Kd2 42.Rg3 Nd5 43.Kc4 (43.Rg6 Nf4 44.Rg4–+) 43...Nf4 44.Kc5 Nd3 45.Kc6 Ne5 46.Kb7 f5 47.Rg5 (47.b6 cb6 48.Kb6 f4 49.Rg2 Ke3 50.Ka5 f3–+) 47...Kc3 48.h5 (48.Rg1 Kb4 49.Re1 Nc4–+) 48...gh5 49.Rh5 Kb4 50.Rh4 (50.Rh1 Ka4 51.b6 cb6 52.Kb6 f4–+) 50...f4 51.Rh5 (51.Ka6 Ka4 52.Rh1 f3 53.Ra1 Kb3 54.Ka5 f2–+) 51...f3 52.Re5 f2 0–1. Skold,Kristian – Ekenberg,Bengt, SWE–ch Sweden, 1962.

6.e3 0–0 7.Nc3 Re8 8.d4 ed3 9.Bd3 d6 10.h3 Nbd7 11.Nf3 Ba7 12.0–0 Nc5 13.Bc2 Be6 14.Qe2 Qe7 15.Rad1 c6 16.Nd4 Rac8 17.Rfe1 Bb8 18.Ne6 Qe6 19.bc6 bc6 (worse is 19...Rc6 20.Nd5 Nfe4 21.f3+–) 20.Na4 Ncd7 21.Bd4 Bc7 22.Rb1 Rb8 23.Rb8 Rb8 24.Rb1 Rb1 25.Bb1 h6 26.Qc2 c5 27.Ba1 Bd8 28.Qb3 g6 29.Bd3 Ne5 Exerts pressure on the isolated pawn 30.Be2 Ned7 31.Qb7 Qe4 32.Qb2 Qe5 33.Nc3 Nb6 34.Qb1 Qe6 35.Qb5 Qf5 36.Bf1 Nfd7 37.Na4 Na4 38.Qa4 Bh4 39.g3 Bd8 40.Bc3 Nf6 41.Qb5 Qc2 42.Bf6 Bf6 43.Qb8 Kg7 44.Qd6 a4 45.Qc5 Bb2 46.Qb4 Qb3 47.c5 Qa3 48.Qb7 Bf6 49.c6 Qc1 50.c7 a3 51.c8Q Qc8 52.Qc8 a2 53.Kg2 a1Q 54.Bc4 Qe5 55.Qb7 Be7 56.h4 h5 57.Qb3 Qe4 58.Kg1 Qf5 59.Qb7 Qf6 60.Be2 Qd6 61.Bc4 Qf6 62.Be2 Qd6 63.Kg2 ½–½. Buczinski,Henryk (2195) – Fages,Jorge Juan (2215), WC–2015–P–00002, 2011.

6.e3 0–0 7.Nc3 Re8 8.Nge2 d6 9.Ng3 Nbd7 10.Qc2 Qe7 11.Be2 c6 (11...Nb6 12.0–0 Qe6 13.Na4 Na4 14.Qa4 d5 15.f3) 12.f3 (12.Na4 Ba7 13.0–0 Nc5 14.Nc5 Bc5 15.f3) 12...ef3 13.gf3 Ne5 14.Nce4 (14.f4 Neg4 15.0–0) 14...Ne4 15.Qe4 Qd8 16.Qc2 Qh4 17.0–0–0 Ng6 18.bc6 bc6 19.Ne4 Bf5 20.Qc3 f6 21.d4 Be4 22.fe4 Bb6 23.Bf3 Qh3 24.Rhf1 Rab8 (24...Qh2 25.e5 fe5 26.Bc6 ed4 27.ed4 Qh6 28.Qd2 Qd2 29.Kd2+/–) 25.e5 (25.Rf2 Qh6=) 25...de5 26.Bc6 ed4 27.ed4 Re3 28.Qc2 Bc7 29.Rfe1 (29.Bb5!?+=) 29...Ra3–/+ (29...Bh2? 30.Bd5 Kh8 31.Rh1 Ra3 32.Qh2 Qh2 33.Rh2+–) 30.Re8 Re8 31.Be8 Rb3 32.Ba4 (32.Bg6!? hg6 33.Qg6 Qe3 34.Kb1 Bh2 35.Qf5–/+) 32...Rb4–+ 33.c5 Nf4 34.Qe4 Be5 35.Bc2 a4 (35...Kf7!? 36.Qe1 Ng2–+) 36.Re1 Kf7 (36...Qh2?! 37.Qf5 Rb8 38.de5=) 37.c6 (37.Qc6 a3 38.Ba1 Ng2 (38...Rd4 39.Bd4 Ne6 40.Qb7 Kf8 41.Be5 fe5 42.Qb8 Kf7 43.Qe5 Qh6 44.Kb1+–) 39.Qd5 Ke7 40.Qd6 Ke8 41.Re5 fe5 42.Qe5 Kf8 43.Qd6 Kf7 44.Qc7 Kg8 45.Qd8 Kf7 46.Qc7 Kg8 47.Qd8 Kf7 48.Qc7=) 37...a3 (37...Qh2 38.c7 Rc4 39.Kb1–/+) 38.Ba1 Rc4 (38...Qh2 39.c7 Rc4 40.c8Q Rc8 41.Qb7 Bc7 42.Bb3 Kg6 43.Qc8 Nd3 44.Kd1 Ne1 45.Qe8 Kg5 46.Qe1–/+) 39.Kb1 a2?? (better is 39...g6 40.Re3 a2 (40...Qh2 41.Bb3 Bd6 42.Bc4 Kg7 43.Ra3 Qg1 44.Ka2 Qf2 45.Bb2 Ba3 46.Ka3+–) 41.Ka2 Qh2–+) 40.Ka2= Rb4 41.Bb2 (41.c7 Qc8 42.Ka3 Bd6 43.Bb3 Rb3 44.Kb3 h6+=) 41...Qe6 (41...Qh2? 42.Ka3 Rb5 43.de5+–) 42.Ka1 Qc4 43.Qf5 (43.Qh7?? Bd4 44.Re7 Ke7 45.Qg7 Kd6 46.Qd7 Kc5 47.Qd4 Qd4 48.Bd4 Kd4–+ (48...Rd4?? 49.c7+–)) 43...Rb2 44.Qd7 (worse is 44.Kb2 Qd4 45.Kc1 Qa1 46.Bb1 Qa3 47.Kd1 Qd6 48.Kc1 Qc6 49.Bc2 g6–+) 44...Kf8 45.Qd8 Kf7 46.Re5?? (better is 46.Qd7 Kf8 47.Qd8 Kf7 48.Qd7= (48.Kb2? Nd3 49.Bd3 Bd4 50.Qd4 Qd4 51.Kc2 Qa4 52.Kd2 Qc6–+)) 46...Qa2 0–1. Lapshun,Yury (2475) – Papp,Gellert (2425), FSGM August, Budapest HUN (4), 2007.

6.e3 0–0 7.Nc3 Re8 8.g4 d6+= 9.g5 Nfd7 10.Qc2 f5 11.gf6 Nf6 12.0–0–0 Bf5 13.Nge2 Nbd7 (13...c6 14.Ng3 Bg4 15.Nce4 Bd1 16.Kd1 Ne4 17.Ne4=) 14.f4 (14.f3 Bg6 15.Nf4 ef3 16.Ng6 hg6 17.Qg6 Ne5=) 14...Nb6 15.Ng3 Now all is on e4 15...Qd7 16.Nf5 Qf5 17.Rg1 Re7 18.Ne2 Rf8 19.Rg5 Qe6 20.Ng3 (20.Nd4 Bd4 21.Bd4 h6=) 20...h6 (20...c6 21.Kb1=) 21.Rg6= Nbd7? (better is 21...c6 22.f5 Qc8=) 22.Bg2+/- Qf7 (better is 22...d5 23.cd5 Qf7 24.Rf6 gf6+–) 23.Nf5+– Qg6 (23...Qe8 24.Rg1 Kh8 25.Ne7 Qe7 26.Be4 Ba3 27.Ba3 Qe4 28.Qe4 Ne4 29.Rg7 Ndc5 30.Rc7 Nd3 31.Kc2 Nb4 32.Bb4 ab4+–) 24.Ne7 Kh7 25.Nf5 (better is 25.Ng6 Kg6 26.Be4 Kf7 27.Rg1+–) 25…Qf7 1–0. Vasiukov,Evgeni (2485) – Van den Berg,Ad (2220), World Seniors, Condino ITA, 2009.

6.e3 d6 7.Bf6 Qf6 8.Nc3 Bf5 9.Nge2 (9.Nd5 Qd8 10.d4 ed3 11.Bd3 Be6 12.Nf3 Nd7 13.0–0+=) 9...0–0 (9...Qe5 10.Ng3 Bg6 11.Qb1 f5 12.Nd5 Kd8 13.d4+=; 9...Qe6 10.Nf4 Qd7 11.Qc2 0–0 12.Ne4 Bd4 13.Rd1+/–) 10.Ng3 Re8?? (better is 10...Qe5+= 11.Qb1 Re8 12.Nd5 Bb6 13.Nb6+=) 11.Nd5+– (11.Nf5?! Qf5 12.d4 ed3 13.Bd3 Qg5+=) 11...Qg6 12.Nf5 Qf5 13.Nc7 Nd7 14.d4 ed3 15.Bd3 Qg5 16.0–0 (16.Na8?! Qg2 17.Rf1 Ra8+–; 16.Ne8?! Qg2 17.Rf1 Re8+/–) 16...Ne5 17.Na8 Ra8 18.Be4 Nc4 19.Bh7! Kh8 (19...Kh7 20.Qc2) 20.Bd3 Ne5 21.Bc2 b6 22.Qd5 Rf8 23.h3 f5 24.Rad1 f4 25.Qe4 g6 26.ef4 Rf4 27.Qa8 Kg7 28.Bb3 Nf3 29.Kh1 Nd4 (29...Rf8 30.Qb7 Kh8+–) 30.Qg8 Kf6 31.Qf7 Ke5 32.Rde1 Re4 (32...Ne2 33.Qe6 Kd4 34.Qe3) 33.f4 1–0. b4_player – opponent, gamecolony.com, 2007.

6.e3 d6 7.Bf6 Qf6 8.Nc3 Qg6 A) 9.f3 f5 10.Qc2 (10.Nh3 0–0 11.Nf4 Qe8 12.fe4 fe4 13.Qh5=) 10...ef3 11.Nf3 Be6 12.d4 Bb6 13.Bd3+=; B) 9.Nd5 Kd8 10.Ra2 Re8 11.Ne2 Qg4 12.h3 Qh4 13.b6=; C) 9.d4 ed3 10.Nd5 Kd8 11.b6 Na6 12.bc7 Nc7 13.Nc7=; D) 9.d3 ed3 10.Nf3 d2 11.Qd2 c6 12.Na4 0–0 13.Qc3=; E) 9.Nge2 E1) 9...Bg4 10.Nf4 Bd1 11.Ng6 hg6 12.Kd1 f5 13.f3+/–; E2) 9...Bf5 10.Nd5 (10.Ng3 Nd7 11.Nd5 Kd8 12.d4 ed3 13.Nf5+=) 10...Kd8 11.Ng3 Bg4 12.Qb1 Re8 13.d4+/–; E3) 9...f5 10.d4 (10.Nf4 Qf7 11.d4 ed3 12.Bd3 Nd7 13.Na4+=) 10...ed3 11.Nf4 d2 12.Qd2 Qf7 13.Be2+=.

5.b5 c6

6.d3 ed3 7.Qd3 d5=.

6.e3 cb5 7.cb5 Be7 (7...d5 8.d3=) 8.Ne2 (8.d3 d5=) 8...b6 (8...0–0 9.Nd4=) 9.Nbc3 (9.d3 d5=) 9...d5= 10.Nd4 (10.d3 Nbd7+=) 10...Bb7 (10...0–0 11.d3=) 11.Rc1 Nbd7 (11...0–0 12.d3+=) 12.Nc6 Bc6 13.bc6 Nc5 14.Nb5 (14.d3 Rc8 15.d4 Ne6+/–) 14...Qc8 (14...0–0!?+=) 15.Bf6+/– Bf6?? (better is 15...gf6 16.d4 ed3+/–) 16.Nd6+– (16.Nd6 Kf8 17.Nc8 Rc8 18.Bb5+–) 1–0. Janek – MBC, internet, 2017.

6.e3 Bc5 7.d4 (7.d3 cb5 8.de4 Ne4+=) 7...Be7= 8.Nc3 (8.d5 cd5 9.cd5 d6=) 8...0–0 (8...d5 9.c5=) 9.d5 cd5 (9...d6!?=) 10.Nd5+/– Nd5 11.Qd5 (worse is 11.cd5 d6=) 11...Bf6 (11...Re8 12.c5 Bf6 13.Bd4+/–) 12.Bd4 Re8 (12...a4 13.Qe4 Re8 14.Qd5+/–) 13.Ne2 (13.c5 Bd4 14.Qd4 a4+/–) 13...d6 (13...Bd4 14.Qd4 (14.ed4?! Qe7=) 14...d5 15.cd5+/–) 14.Rd1 Qc7? (better is 14...Bd4!? 15.Rd4 a4+/–) 15.Bf6+– gf6 16.Nc3 Be6 17.Qd6 Qd6 18.Rd6 Nd7 (18...f5 19.Nd5 Bd5 20.cd5+–) 19.Ne4 f5 20.Rd7! Bd7 (20...fe4 21.Rb7 Rac8+–) 21.Nf6 Kf8 (21...Kg7 22.Nd7 f4 23.Nb6+–) 22.Nd7 Ke7 23.Nb6 Rad8 24.Nd5 Kf8 (24...Kd6 25.Bd3+–) 25.Bd3 1–0. pierre – elixir, internet, 2010.

6.e3 d5 7.Nc3 Nbd7 8.d3 ed3 9.cd5 cd5 10.Bd3 Bd6 11.Nf3 0–0 12.0–0 Nb6 13.Ra2 (13.Qe2 Be6+=) 13...Bg4 14.h3 Bh5 15.Be2 Exerts pressure on the isolated pawn 15...Nc4 16.Bc1 (16.Nd5? Nb2 17.Rb2 Nd5–+) 16...Rc8 17.Qd4 Bf3 18.Bf3 Increasing the pressure on the isolated pawn on d5 18...Be5 19.Qd3 Ne3! 20.Be3 (20.fe3 Rc3) 20...Rc3 (20...Bc3?! 21.Rc2 Be5 22.Rc8 Qc8 23.Bd5 Nd5 24.Qd5=) 21.Qf5 Bc7 (21...Qd6 22.Re1–/+) 22.Bd4+= Qd6 Do you see the mate threat? 23.g3 g6 24.Qf6 Qf6 25.Bf6 Rf3 26.Ba1 Rd8 27.Rd1 Bb6 Black prepares the advance d4 28.Kg2 Rb3 29.a4 d4 30.Bb2 Bc5 31.Kf1 f6 32.Ke2 (32.Bc1 d3–+) 32...Re8 33.Kf1 Re4 (33...Re4 34.Ba1 Kf7–/+; 33...Rb4 34.Rc1 Bd6 35.Rd1–/+) 0–1. Margraf – Roggensack Hanspach, corr SOK–87–09, 1988.

6.e3 d5 7.bc6! bc6 8.cd5 cd5 9.Bf6 Qf6 10.Nc3 Be6 11.Bb5 Nd7 12.Bd7 Kd7 13.Qb3. Kreuzer.

6.e3 d5 7.cd5 cd5 8.Ne2 (8.d3 Nbd7=) 8...Bd6 (8...Be7 9.Nbc3+=) 9.Nbc3 (9.d3 0–0=) 9...0–0+= 10.Qb3 (10.d3 Be5+=) 10...Be6 (10...Nbd7 11.Nd4+= (11.Nd5?? Nc5 12.Nf6 gf6–+)) 11.Nd4 Nbd7 12.Na4 (12.Be2 Rc8+=) 12...Ne5 (12...Rc8 13.d3+=) 13.Be2 (13.Rc1 Rc8+=) 13...Nfg4 (13...Rc8 14.Ne6 fe6 15.Bd4–/+) 14.g3 (14.h3 Nf6+=) 14...Qf6–/+ 15.0–0–0? (better is 15.0–0–/+) 15...Nf2–+ 16.Nb6 (16.Rhf1 Bh3–+) 16...Nd1 17.Rd1 (17.Kd1 Rad8–+) 17...Rad8 (17...a4 18.Qa2 Rad8 19.Nd5 Rc8 20.Kb1–+) 18.Nd5 Bd5 19.Qd5 Ba3 20.Qe4 Bb2 (20...Qe7 21.Nf3 Qc5 22.Kb1 Nf3 23.Ba3 Nd2 24.Rd2 Qa3 25.Ra2–+) 21.Kb2 Qe7 (21...Qd6 22.Nf5 Qc5 23.Ka2–+) 22.Nf5 (22.Nf3 f6–+) 22...Qc5 23.d4 (23.Ka2 Rc8 24.Rb1–+) 23...Qb4 24.Ka2 Rc8 (better is 24...Qa4 25.Kb2 Nc4 26.Bc4 Qd1 27.Qc2–+) 25.Rb1 (25.Ne7 Qe7 26.de5 Qe6 27.Kb2–+) 25...Qa4 26.Kb2 Nc4 27.Bc4 Rc4 (27...Qc4?! 28.Ne7 Kh8 29.Nc8 Rc8 30.b6–/+) 28.Qe5 (28.Ne7 Kh8 29.Qd3 Qb5 30.Qb3–+) 28...Rc2 0–1. Kreuzer,U (1935) – Stromer,A (2270), Bezirkspokalmann, 1993.

6.e3 Be7 7.Be2 0–0 8.Nc3 d5 9.d4 Bf5 10.bc6 bc6 11.h3 Nbd7 12.cd5 cd5 13.Rc1 Qb8 14.Nb5 Rc8 15.Rc3 Rc3 16.Bc3 Ne8 17.Qb3 Nc7 18.a4 Nb5 19.Bb5 Be6 20.Ne2 Bd6 21.Bd2 Nb6 22.0–0 Qc7 23.Rc1 Qb8 24.Qc2 Ra7 25.Qc3 f5 26.f4 Nc4=+ 27.Bc4 dc4 28.Ng3 Qb6 29.Qc2 Rc7 30.Rb1 Bb4 31.Ne2 Qd6 32.Nc3 Bd7 33.Rf1 Rc8 34.Qa2 Be6 35.Qb2 Bd7 36.Rf2 Be8 37.Qc2 Bf7 38.Nb5 Qe7 39.Nc3 Rc6 ½–½. Psion – Psion, 90 sec/Zug, 1988.

6.Bf6 Qf6 7.Nc3 e3 8.Nf3 ef2 9.Kf2 Be7 10.e3 d6 11.Be2 0–0 12.Rf1 Nd7 13.Kg1 Qh6 14.Nd4 Ne5 15.Qc2 Bg5 16.Kh1 g6 17.bc6 bc6 18.Ne4 Be7 19.c5 d5 20.Nd6 Bd7 21.Qc3 Qg5 22.Rab1 f5 23.a4 f4 24.ef4 Rf4 25.Rf4 Qf4 26.Rf1 Qg5 27.Nf3 Nf3 28.Bf3 (28.Qf3 Rf8 29.Qe3 Qe3 30.de3 Rf1 31.Bf1 Bd6 32.cd6 Kf7–+) 28...Be6 29.Re1 Bd7 30.d4 Bf6 31.Qb2 Qh4 32.Rf1 Qd4 33.Qb7 Rd8 34.Qc7 Qe5 (worse is 34...Qc5 35.Nb7 Qa7 36.Bg4 Bg4 37.Rf6–/+; worse is 34...Qa4 35.Nb7 Qc4 36.Rd1+–) 35.h3 Bh4 36.Qa5 Rf8 37.Qc7 Qe6 38.Nb7 Bc8 39.Qd6 Qd6 40.Nd6 (40.cd6? Bb7 41.Rb1 Ba8–+) 40...Be6 41.a5 Ra8 42.Nb7 Bf5 43.Ra1 Bf6 44.Ra3 Kf8 45.a6 Ke7 46.Be2 Bd4 47.Ra4 Be3 48.Nd6 Be6 49.Nb7 h5 50.Ra3 Bd4 51.g4 hg4 52.hg4 Kf6 53.Kg2 Kg5 54.Ra4 Be3 55.Na5 Bd7 ½–½. Benassi,Aspasio (2120) – Siviero,Giuseppe (2410), FSI, 2000.

5.b5 d5

6.cd5 Nd5 7.Nc3 Bf5 =.

6.cd5 Nd5 7.e3 Bf5 8.Nc3 Nf6 9.Bc4 c6 10.bc6 Nc6 11.Na4 Ra7 12.Qb3= Qe7 13.Ne2 Be6 14.Ng3+/– Bc4 15.Qc4 Ra8 16.0–0 Rd8 17.Bf6 Qf6 18.Ne4 Qe5 19.Rfb1 Rd7 20.Ra2+– Na7 21.Nac5 Bc5 22.Nc5 Rc7 23.Rb7 0–0 24.Rc7 Qc7 (24...Qc7 25.Rb2 Rc8+–). Psion – Psion, 4', 1988.

6.cd5 Nd5 7.e3 Bf5 8.Nc3 Nf6 9.Bc4 c6 10.bc6 Nc6 11.Na4 Bd6 12.Qb3 Qe7 13.Qb5 Be6 14.Be6 fe6 15.Bf6 (15.Nb6 Rd8=) 15...gf6 16.Ne2 Ba3 17.Nb6 Rd8 18.Nd4 (better is 18.Qh5!? Kf8 19.Nf4+=) 18...Qb4–+ 19.Qh5 Ke7 20.Qh6? (20.Qg4 Nd4 21.Qg7 Kd6 22.ed4–+) 20...Nd4 21.Qg7 Kd6 22.ed4 Kc6 (22...Bb2!? 23.Ra4 Qb6 24.Qf6–+) 23.Nd7 Bb2 (23...Rdg8 24.Qf7 Qe7 25.Qe7 Be7 26.Nc5 Bc5 27.dc5–+) 24.Rb1 (24.d5 Kd5 25.Rb1–+) 24...Qd4 25.0–0 (25.Rb2 Qb2 26.0–0–+) 25...Rdg8 (better is 25...Qd7 26.Qd7 Rd7 27.Rb2 b5–+) 26.Qe7–/+ Re8 27.Rfc1 Bc1 28.Ne5 Exerts pressure on b7 28...Qe5?? Theme: Blockade (28...fe5 Blocks the square `8 29.Qb7) 29.Qb7+– 1–0. Gross,Wilhelm – Psion, 1988.

6.cd5 Nbd7 7.d3 e3 (7...ed3 8.Qd3 Bd6 9.Nf3=) 8.fe3 Nd5 9.Qd2 (9.Qc1 Bc5 10.e4 Be3=) 9...Bd6 (9...Nc5 10.e4 Nf6 11.Qc2+=) 10.Nf3= 0–0 11.Nc3 (11.g3 Nc5 12.e4 Nb6+=) 11...N5f6 12.e4 Ng4 (12...Re8 13.Qg5=) 13.h3?? (better is 13.Nd5+=) 13…Bg3–+ (13...Bg3 14.Kd1 Nf2 15.Kc2 Nh1–+) 0–1. Stapinski,Ryszard (1995) – Oleksak,Andrzej (1960), 56. Championship Poland Quarterfinal B POL, 2009.

6.e3 Nbd7 7.d3 ed3 (7...dc4 8.de4 Ne4 9.Bc4=) 8.Qd3 (8.Bd3 Nc5=) 8...Nc5+= 9.Qc2 Be6 10.Nd2 (10.cd5 Bd5 11.Nc3 Bb3+=) 10...Be7 (10...Bd6 11.cd5 Bd5 12.Nc4+=) 11.Ngf3 a4 (11...dc4 12.Nc4 Qc8 13.Nd4=) 12.Rd1 0–0 13.Ng5 h6 (better is 13...Ncd7=) 14.h4?? (better is 14.Bf6 hg5 15.cd5 Bf6 16.de6 Ne6 17.Ne4+/–) 14...hg5–+ 15.hg5 Opening the h–file gets White a lot of play 15...Nfe4 16.Ne4 Ne4 17.cd5 Bd5 18.Bd3 (18.Bc4 c6 19.Bd5 cd5–+) 18...Bb3 (18...Ng5 19.Bh7 Kh8 20.Be4 Kg8 21.Bd5+–) 19.Qe2? (better is 19.Be4 Bc2 20.Rd8 Be4 21.Rd7–+) 19...Bd1 20.Qd1 Bg5 (20...Ng5 21.Qc2 Re8 22.Bh7 Kf8–+) 21.Qh5= The mate threat is Qh7 21...Bh6 (21...Bh4 22.Be4 f5 23.Bf5 (23.Rh4 Re8 24.Qh7 Kf7 25.Qg7 Ke6 26.Rh6 Qf6 27.Rf6; worse is 23.Bb7 Qd3 24.Rh4 Qb1 25.Qd1 Qd1 26.Kd1 Rfd8 27.Ke2 Ra5+–) 23...Rf5 24.Qf5+–) 22.Be4 Re8 (22...Rb8!?=) 23.Bd5+/– Qd7 24.Bf6 Kf8 (24...gf6 Theme: Deflection from h6 25.Qh6) 25.Bb7+/– Rab8 26.Qg5?? (26.Bc6 Qd6 27.Be8 Qf6 28.Bc6 Qc3 29.Kf1 Qc1 30.Ke2 Qb2 31.Kf3 Qf6 32.Kg3 Qd6 33.Kh3+/–) 26...Qd3 (26...Re3 27.Qe3 Rb7+/–) ½–½. Woelfelschneider,Peter – Djuric,Mirko, T16–05 TSC, 2003.

6.e3 Be6 7.cd5 Nd5 8.d3 ed3 9.Bd3 =.

5.b5 Be7

6.Nc3 0–0 7.Qc2 d5 8.cd5 Bf5 9.e3 Nbd7 10.d4 White is behind in development. 10...Nb6 11.Nge2 Bd6 The black bishop is safe in front of d5 12.Ng3 Bg6 13.Qb3 (13.Bc1 Nbd5 14.Nge2 Nc3 15.Nc3 Qe7=) 13...Re8 (13...Nbd5 14.Bc4 Bg3 15.hg3+=) 14.Be2 (14.Bc4 a4 15.Qa2 Bg3 16.fg3 Qd6=) 14...h5 (14...Nfd5 15.Rc1=) 15.a4 (15.Nf1!?+= should be investigated more closely) 15...h4 16.Nf1 Nfd5 17.Nd5 Nd5 The knight feels good on d5 18.Nd2 (18.Ba3 Ba3 19.Ra3 c5 20.bc6 bc6=) 18...Qg5 19.g3 Secures f4 19...c6 (19...Bb4 20.Ba3=) 20.Ba3 Bb4 21.Bb4 ab4 (21...Nb4 22.Rb1=) 22.bc6 bc6 White has a new passed pawn: a4. Black has a new passed pawn: b4 23.Nc4 Nc3 White cannot castle queen side 24.Qb4 (24.Bf1!? is worth consideration 24...hg3 25.hg3= (25.fg3? c5–+)) 24...Ne2+= 25.Ke2 White loses the right to castle 25...Bh5 26.Kd2 Red8 27.Rhg1?? (better is 27.gh4 would bring relief 27...Qf5 28.Kc1+=) 27…Rd4 (27...Rd4 28.Kc2 c5–+) 0–1. Koerner,Helmut (1805) – Krug,Peter (2195), Berlin op, 2002.

6.Nc3 0–0 7.Qc2 Re8=.

6.Nc3 0–0 7.e3 c6 8.d3 d5 9.cd5 (9.Qc2 cb5 10.de4 de4 11.cb5 Re8 12.Rd1 Qc7 13.Rc1=; 9.de4 de4 10.Qc2 Re8 11.Rd1 Qc7 12.Nge2 Nbd7 13.Ng3=; 9.bc6 bc6 10.Qc2 Bf5 11.de4 Ne4 12.Bd3 Bf6 13.Nf3=) 9...cd5 10.de4 de4 11.Nge2 (11.Qc2 Re8 12.Rd1 Qc7 13.Rd2=) 11...Bf5 (11...Nbd7 12.Nd4= Nc5 13.Rc1=) 12.Ng3 Bg6 13.Nce2 (13.Qa4=) 13...a4 14.Nf4 Qa5 15.Qd2 Qd2 16.Kd2 Rd8 17.Ke1 Nbd7 18.h4 h5 19.Ng6 fg6 20.Bc4 Kh7 21.Ke2 Nc5 22.Rad1 Rdc8 (22...Bd6 23.Rhf1+=) 23.Rc1 (23.Rd2 Ne8 24.Be5 Nf6+/–) 23...Ne8 24.Bd5 Nd6 25.Ba1 (25.b6 Nd3 26.Rc8 Rc8=) 25...Nb5 26.Ne4 Ne4 27.Be4 Ba3 28.Rb1 (28.Rc8 Rc8 29.Bb7 Rc2 30.Kd3 Rf2=) 28...Rc4 (28...Nd6 29.Bb7 Nb7 30.Rb7 Rc2 31.Kd3 Rf2 32.Bg7=) 29.Bd3 Nc3 30.Bc3 Rc3 31.Rb7 Rb3 32.Rb1 Rb7 33.Rb7 ½–½. Bonetti,Shane – Marko,Martin (2225), corr MDK Malbork, 2007.

6.Nc3 0–0 7.e3 d5 8.cd5+= Bf5 (8...Nd5 9.Ne4 c6 10.Qf3+=) 9.d3 Nbd7 (9...Re8 10.Rc1+=) 10.Nge2 (10.de4 Ne4 11.Bd3 Nc3 12.Bc3 Bd3 13.Qd3 Nb6+=) 10...Nc5+= 11.Ng3 Bg6 12.de4 Nfe4 (12...Nce4 13.Bc4+/–) 13.Be2 (13.Nce4 Ne4 14.Bc4 Bf6 15.Bf6 Qf6+/–) 13...Bf6 14.Rc1 Re8 (14...Ng3 15.hg3 (worse is 15.fg3 Re8+=) 15...a4 16.Bc4+=) 15.Nge4 Be4 (15...Ne4 16.0–0+/–) 16.Ne4 Ne4 17.Bf6 Nf6 18.0–0 (18.Bf3 Qd6 19.Qd4 Qa3 20.Rc7 Rec8 21.Rb7 Rc1 22.Bd1 Qd6+–) 18...Qd6 (18...Nd5? 19.Bf3 Nf6 20.Bb7+–) 19.a4 (19.Bf3 Re5+/–) 19...Rad8 (19...Re7 20.Bc4+/–) 20.Bf3 Rd7 (20...Nd7 21.Qc2 Ne5 22.Be2+/–) 21.Qd2 Qb6 22.Rfd1 Red8 (22...h6 23.Qd4+–) 23.Rc4 (23.e4 Re7 24.Qf4 Qd6 25.Qd6 cd6+/–) 23...h6 (23...Nd5 24.Bd5 Rd5 25.Qd5 Rd5 26.Rd5+–) 24.e4 Re7 (24...c6 25.Qd4 Qd4 26.Rcd4+/– (26.Rdd4?! cd5 27.ed5 Nd5+=)) 25.Qd4 (25.Qf4 g5 26.Qf5 Qd6+–) 25...Qd4 (25...Qd6 26.Qa7 b6 27.Qb7+/–) 26.Rcd4+– (26.Rdd4?! Rd5 27.Rc7 Rd4 28.Re7 Ra4+=) 26...b6 (26...g5 27.g4+/–) 27.Rc1 Rde8 28.Rcc4 Rd8 29.g3 Ne8 30.Rc6 Kf8 31.Kf1 Nd6 32.e5 Re5 33.Rc7 Re7 (33...Nf5 34.Rd2+–) 34.Rc6 Rb7 35.Ke2 Re8 36.Kd2 (36.Kd3 Ke7+–) 36...Ke7 37.Rd3 Kd7 38.Re3 Re3 (38...Rbb8 39.Re8 Re8 40.h4+–) 39.fe3 g6 (39...f5 40.Kd3+–) 40.e4 f6 41.Ke3 Ke7 (41...h5 42.Kd4 Ke7 43.e5 fe5 44.Ke5 Nf7 45.Kd4+–) 42.Bg4 h5 43.Be6 Nf7 (43...g5 44.Kd4 Nf7 45.Bc8+–) 44.Bf7 Kf7 45.Kd4 g5 46.e5 fe5 47.Ke5 Re7 48.Kf5 Re2 (48...Re2 49.Rb6 Rh2 50.Rb7 Ke8+–). Pleschke,Helmut – Luzuriaga,Norberto Horacio, 1. B4 Thementurnier, 2000.

6.Nc3 0–0 7.g3 c6 8.Bg2 d5 9.cd5 cd5 10.e3 Nbd7 11.d3? Nc5–+ 12.de4 de4 13.Qd8 Rd8 14.Bf1 Ng4 15.Nd1 Be6 16.h3 Nh6 17.Rc1?! (17.Nc3–+) 17...Na4 (17...Na4 18.Bg2 Nb2 19.Nb2 Ba3 20.Be4 Bb2–+) 0–1. rona81 (1990) – acalado58 (1980), gameknot.com, 2015.

6.Nc3 c6 7.d3 e3 8.fe3 Ng4 9.Qd2 Bg5 10.Ne4 Be3 11.Qc3 f6 12.h3 Nh6 (12...d5 13.cd5 Nh6 14.dc6 bc6 15.bc6 Qc7+/–) 13.Nd6+/– Kf8 14.d4 Bf4 15.Nc8 Qc8 16.e4 Qc7 17.Ne2 cb5 18.Qf3 (18.Nf4?! Qf4 19.Qf3 Qf3 20.gf3 bc4 21.Bc4 Nc6+=) 18...Bd6 19.c5 Bc5 (19...Be7 20.Nc3+–) 20.dc5 Nf7 21.Nf4 Na6 22.Nd5 Qc5 23.Rc1 Qd6 24.Bb5 Ng5 25.Qe3 Re8 26.Nf6! gf6 27.0–0 Ne4 28.Qh6 Kf7 29.Rf6!! Nf6 30.Bc4 (30.Bc4 Ke7 31.Bf6 Qf6 32.Re1 Qe6 33.Re6 de6 34.Qe6 Kd8 35.Qd6 Kc8 36.Be6 Re6 37.Qe6 Kc7 38.Qe5 Kc6 39.Qh8+–) 1–0. Timmermans,Mark (2285) – Gutkind,Kedem (1965), Vlissingen NED, HZ Open, 2013.

6.Nc3 c6 7.g3 d5 8.cd5 cd5 9.Bg2 0–0 10.e3 (10.d3!? Bf5 11.de4 de4 12.Nh3=) 10...Nbd7–/+ 11.d4 Nb6 12.f3? (better is 12.Nge2!?–/+) 12...Nc4–+ 13.Bc1 Bf5 14.Nge2 Re8 (14...ef3 15.Bf3 Rc8 16.0–0–+) 15.Nf4 (15.fe4 de4 16.0–0 Qd7–/+) 15...Bf8 (better is 15...Rc8!? 16.fe4 Ne3 (16...Ne4?! 17.Ne4 de4 18.0–0–/+) 17.Be3 Rc3–+) 16.0–0–/+ Rc8 17.Qe2 (17.fe4 de4 18.Qe2 Be7–/+) 17...b6 (17...ef3 18.Qf3 Bg4 19.Qf2–/+) 18.a4? (18.fe4 Be4 19.Ne4 Ne4+= (worse is 19...Re4 20.Nh5 Nh5 21.Be4 de4 22.Qh5+/–)) 18...h6?? (18...Bb4 19.Na2–+) 19.Ra2?? (better is 19.fe4!? Be4 20.Ne4 Ne4 21.Qh5=) 19...ef3 (better is 19...Bb4 20.Nd1 ef3 21.Bf3 Qd7–+) 20.Qf3–/+ Ne3 21.Be3 Rc3 (21...Rc3 22.Nd5 Nd5 23.Qd5 Be6 24.Qd8 Rd8–/+) 0–1. Rudol,Matylda – Nowak,Kamil (1650), Polanica–Zdroj POL, Open, 2012.

4.a3 b6

5.b5 a6 6.a4 (6.Nc3 ab5 7.cb5 Bc5+=) 6...Bb7 7.Nc3 Bb4 8.e3 (8.Nd5 Nd5 9.cd5 0–0+=) 8...0–0–/+ 9.Nge2 c6 10.Rc1 Qe7 11.Ng3 Re8 12.Be2 d5 (12...ab5 13.ab5 Qd6 14.0–0+=) 13.cd5= cd5 14.Qb3 Bc5 15.0–0 d4 16.ed4 Bd4 17.Rfe1 (17.Nf5 Qd8=) 17...Qd7 18.Nd1 (18.Bc4 Re7=) 18...Bb2 19.Qb2 a5 (19...Bd5 20.Nc3 Re6 21.d4 (21.Nd5 Qd5 22.Bc4 Qe5+–) 21...ed3 22.Nd5 Qd5 23.Bf3 Re1 24.Re1+–) 20.Ne3= Rc8 (20...Rd8 21.Nc4 Qe6 22.Qc3=) 21.Rc8 Bc8 22.Rc1 Qd8 23.Qd4!? The mate threat is Qxd8 23...Nc6 (23...Qd4 A deflection 24.Rc8 A beautiful mate combination) 24.Qd8 Nd8 25.Nc4 Be6 26.Nb6 Rb8 27.Nc4 Nb7 28.Nb2 (28.d4 ed3 29.Bd3 Nc5+–) 28...Nd6 (28...Rc8 29.Rc8 Bc8 30.d4+–) 29.d3 ed3 30.Bd3 Kf8 31.Rc6 (31.Rc6 Ke7 32.Rc7 Kd8 33.Ra7+–) 1–0. Sternik,Ryszard – Frysiak,Adam, corr PL ch, 1992.

5.Nc3 a5 6.b5 Bb7=.

5.Nc3 Bb7 6.e3 Be7 7.Nge2 0–0 8.Ng3 d6 9.Qc2 Re8 (9...a5 10.b5+=) 10.Nce4 Nbd7 (10...Ne4 11.Ne4 a5 12.b5+/–) 11.d4 (11.Bd3 Ne4 12.Be4 Be4 13.Ne4 Nf6+/–) 11...Be4 (11...Ne4!? 12.Ne4 a5+=) 12.Ne4+/– Ne4 13.Qe4 Nf6 (13...a5 14.Qc6+/–) 14.Qf3 Qd7 15.Be2 c6 16.0–0 (16.d5 Rac8+–) 16...Rab8 (16...d5 17.Bd3+/–) 17.Rac1 (17.d5 cd5 18.cd5 Qa4+–) 17...Qc7 (17...d5 18.Bd3+–) 18.d5 (18.Bd3 c5+–) 18...c5 19.Bd3 Qd8 (19...Nd7 20.Bf5+–) 20.Rfd1 (20.Bc2 Qd7+–) 20...g6 21.Bc2 a6 (21...Nh5 22.Ba4 Rf8 23.Rc2+–) 22.bc5 bc5 23.Bc3 Nh5 (23...Nd7 24.Ba4+–) 24.Rb1 Rb1 25.Rb1 Rf8 (25...Bf6 26.Bd2+–) 26.g4 Ng7 (26...Bf6 27.Bd2 (27.gh5?! Bc3 28.Qg3 Be5+/–) 27...Ng7 28.Rb7+–) 27.Rb7 Ne8 28.Ba4 f5 (28...Bg5+–) 29.Rd7 fg4 (29...Ng7 30.Rd8 Bd8 31.gf5 Rf5 32.Qe4+–) 30.Qe4 (30.Qg4 Qc8 31.Qe6 Rf7 32.Re7 Qe6 33.Re6 Ng7 34.Rd6 Rb7+–) 30...Qd7 (30...Ng7+–) 31.Bd7 (31.Bd7 Bf6 32.Qe6 Kg7 33.Ba5+–) 1–0. Tatarcik,Vladimir (1900) – Bagar,Miroslav, Ostrava Konik op–C, 2011.

5.Nc3 Bb7 6.f3 a5 7.fe4 (7.ba5 Ra5 8.fe4 Ne4 9.Nf3 Na6 10.Ne4 Be4 11.d3 Bb7 12.Bc3) 7...ab4 (7...Ne4 8.Nf3 ab4 9.ab4 Na6 10.Ne4 Be4 11.b5 Nc5 12.d3) 8.ab4 Ra1 (worse is 8...Ne4 9.Ne4 Be4 10.Ra8 Ba8 11.Qa1+= Nc6 12.Bg7; 8...Bb4 9.Nf3 Ra1 10.Qa1 Bc3 11.Bc3 Be4 12.d3) 9.Qa1 Bb4 (9...Na6 10.b5 Nc5 11.e5 Ng4 12.Nf3) 10.Nf3 0–0 (10...Bc3 11.Bc3 Be4 12.d3) 11.Nd5 Nd5 12.cd5 c6 (better is 12...f6!?=) 13.Bg7+/– Re8 14.Bh8 f6 (better is 14...Bf8!? 15.Be5 d6+=) 15.Bf6+– Be7 16.Bh8 Kf7?? (better is 16...Bf8+–) 17.Qg7 1–0. pierre – krasitz, internet, 2011.

5.d3 Bb7 6.Nd2=.

5.d3 ed3 6.Qd3 (6.e3 Bb7=) 6...Bb7 7.Nf3 (7.Qe3 Qe7 8.Qf4 d5=) 7...a5 (7...Be7 8.Nc3=) 8.b5 Bf3 (better is 8...Ne4!?=) 9.Qf3+/– c6 (9...Ra7 10.Bf6 gf6 11.e3+/–) 10.e4 (10.Qe3 Be7 11.Bf6 gf6+/–) 10...Be7 (10...Qc7 11.Bf6 gf6 12.Nd2+/–) 11.e5+– Ng8 12.Nc3 (12.Bd3 Nh6+/–) 12...Nh6 (12...f6 13.Bd3+/–) 13.Bd3+– 0–0 14.Rd1 (14.Na4 f6+/–) 14...f6 15.e6 (better is 15.bc6 Nc6 16.Qd5 Kh8 17.e6+–) 15...de6? (better is 15...Qe8+/–) 16.Bh7!+– Kh7 17.Rd8 Rd8 18.bc6 Ra7 (18...Na6+–) 19.Nb5 Ra6 (19...Nc6 20.Qc6 Rad7+–) 20.c7 Rc8 21.Qe4 Kh8 22.Qb7 Bb4 23.ab4 ab4 24.Qc8 Kh7 Black threatens to counter with Ra8 25.cb8Q 1–0. pierre – major51, chesshere.com, 2008.

5.e3 Bb7 6.Nc3 d5 7.cd5 Bd5 8.Nd5 Nd5 9.Bc4 c6 10.Qc2 (10.Qg4 Be7+–) 10...Qe7? (10...f5!?+=) 11.Ne2 b5 12.Ba2 a5 13.Nd4 f6?? (better is 13...Ra6 14.ba5 Nf6+/–) 14.Nc6+– Qe6 15.Na5 (15.Nd4 Ne3 16.fe3+– (16.Ne6?! Nc2 17.Kd1 Na1 18.Nc7 Kd7 19.Na8 ab4 20.ab4 Na6 21.Ba1 Kc6+/–; 16.Be6 Nc2 17.Nc2 Nc6+–; worse is 16.de3 Qa6 17.Qe4 Be7+–)) 15...Ra7? (15...Na6+–) 16.Bd5 Qd5 17.Qc8 Qd8 18.Qd8 (better is 18.Rc1 Rf7 19.Qf5+–) 18...Kd8 19.0–0 Bd6 20.Rac1 Kd7 21.Nb3 h5 22.Nc5 Bc5 23.Rc5 Rb7 24.Rfc1 Na6 25.Rc6 Nb8 26.R6c5 h4?? (better is 26...Na6=) 27.Rd5+– Ke6 28.Rcc5 g6 29.Rb5 Rb5 30.Rb5 Nd7 31.f4 f5 (31...Ra8+–) 32.Bh8 1–0. combijack (1785) – cichociemny, gameknot.com, 2009.

5.e3 Bb7 6.Nc3 Be7 7.Be2 0–0 8.Nh3 c5 (8...Nc6 9.0–0 Bd6 10.Qc2+=) 9.b5 d5 10.cd5 Nd5 11.0–0 Nd7 (11...Nc3 12.Bc3 Nd7 13.Qc2=) 12.Nd5 (12.Ne4!? Ne3 13.de3 Be4 14.Qa4+=) 12...Bd5= 13.Nf4 Bb7 14.Qc2 a6 (14...Bf6 15.f3=) 15.a4 (15.ba6 Ba6 16.Ba6 Ra6 17.Qe4 Nf6+/–) 15...a5 16.Rad1 Qc7 17.Nh5 f6 (17...Ne5!?+=) 18.Bc4 Kh8 19.Nf4 Qb8 (19...Ne5 20.Ne6 Qd7 21.Be5 (21.Nf8?! Rf8 22.Be5 fe5+/–) 21...fe5 22.d3+–) 20.Ne6 (20.d3!?+–) 20...Re8+/– 21.g3 (21.d3 Ne5 22.de4 Nc4 23.Qc4 Bd6+–) 21...Bd6 (21...Ne5 22.Be5 Qe5 23.Qb3=) 22.Nf4 (22.d3!?+/–) 22...Ne5= 23.Be2 (better is 23.Be5 Be5 24.Nd5=) 23...Nf3–/+ 24.Bf3 ef3 25.Qf5 Bc8 (better is 25...Bf4 26.Qf4 Qc8–/+) 26.Qh5= Bb7 27.Ng6 (better is 27.Qf5!?=) 27...Kg8–/+ 28.Nh4 Be5 (better is 28...Qc8!?–/+) 29.d4= cd4 30.ed4 Bd6 31.Nf5?? (better is 31.d5!?=) 31...g6 (31...Re2 32.Bc1 g6 33.Nh6 Kh8 34.Qh4–/+) 32.Nh6–/+ Kg7 33.Qh4 Re4 (better is 33...Bd5!? 34.Rfe1 Qd8 35.Re8 Qe8–/+) 34.Ng4+= Rg4?? (better is 34...Qd8 35.Rfe1 Re2+=) 35.Qg4+– h5?? (better is 35...Qc8 36.Qc8 Rc8+–) 36.Qd7 Kh6 (36...Kg8 37.Rc1 Kf8+–) 37.Bc1 g5 38.h4 (38.Qf7 Qc7 39.Qf6 Kh7 40.Qf5 Kg8 41.Qg6 Qg7 42.Qd6 Re8+–) 38...Bc8 (38...Kg6 39.hg5 Qc7+–) 39.Qf7 Bg3 (39...Ra7 40.Qf6 Kh7 41.Bg5 Bh3 42.Qf3 Qe8+–) 40.hg5 (40.Qf6 Kh7 41.Qf7 (41.fg3?? Qg3 42.Kh1 Qg2) 41...Kh8 42.Bg5 (42.fg3 Qg3 43.Kh1 Qg2) 42...Bh4 43.Bh4 Qh2 44.Kh2 Be6 45.Bf6) 40...fg5 41.Qf6 (41.fg3?? Qg3 42.Kh1 Qg2) 41...Kh7 1–0. Fritz,Reinhold – Moesche,Karl Heinz (1620), Bad Griesbach Seniors op 5th, 2002.

4.a3 c5

5.Qa4 Be7+= 6.b5 0–0 (6...d5 7.cd5 Qd5 8.Nc3=) 7.Nc3 d6 8.e3 a6 9.d3 Bf5 10.Qc2 (10.Nge2 ed3 11.Nf4 d2 12.Kd2 Nbd7+=) 10...ed3 (10...Qa5 11.de4 Ne4 12.Bd3=) 11.Bd3 Bd3 12.Qd3 ab5 13.Nb5 d5 14.Rd1 Qa5 15.Bc3 Qa4 16.cd5 Nd5 17.Ne2 (17.Qd5 Deflection from b5 17...Qb5) 17...Nc6 18.Qb1 Rfd8 19.Rd5 (19.0–0 Qg4 20.Qb2 c4=) 19...Rd5 20.Nc7 Rd7 (20...Rdd8 21.Na8 Ra8 22.0–0+= (22.Qb7?? Rb8 23.Qb8 Nb8–+)) 21.Na8 Qa8 22.Qe4 (22.Qa1 Bf8+=) 22...Bf8 (22...Qa3? 23.Qg4 Bf6 24.0–0 (24.Qd7?! Bc3 25.Nc3 Qc3 26.Ke2 Qc2 27.Ke1 h6=) 24...Bc3 25.Qd7+–) 23.Qg4 (23.Bb2 Rd8+=) 23...Rd6 24.a4 Nb4 Threatening mate: Nc2 25.0–0 Qa4 26.Bb4 (26.Ng3 b5 27.Ra1 Qb3 28.Bb4 Qb4 29.Qb4 cb4–/+) 26...Rd1 (26...Rd2 27.Nc3 Qb4 28.Ne4–/+) 27.Nc1 Rf1 28.Kf1 cb4 29.Nd3 Qc2 (29...Qb5 30.Qd1–/+) 30.Qf5 (30.Qd4 Qd1 31.Ne1 Qd4 32.ed4 b3–+) 30...Qd1 31.Ne1 b3 32.Qb5 Qb1 33.Qd3 Qd3 34.Nd3 Ba3 35.Ke2 b2 36.Nb2 Bb2 37.Kd3 b5 38.Kc2 Ba3 (38...Be5 39.f4 Bd6 40.h3–+) 39.e4 Kf8 40.Kb3 (40.f4 Ke7–+) 40...Bc5 (40...Bc5 41.f3 Ke7–+) 0–1. Schulz,Hans_Juergen – Vornanen,Alpo, TT–10. ETC, 2004.

5.Qa4 Be7+= 6.Nc3 0–0 (6...cb4 7.ab4 0–0 8.b5=) 7.b5= a6 (7...Bd6 8.Nd5 Nd5 9.cd5=) 8.e3 (8.g3 Bd6=) 8...b6+= 9.f3 (9.d3 Bb7+=) 9...Bb7 10.ba6 (10.Be2 Re8+=) 10...Na6 11.Qb3 d5 12.cd5 ef3 13.Nf3 Nd5 14.Bc4 Nac7 (14...Nc3 15.Bc3 Bf3 16.gf3=) 15.0–0 Nc3 16.Qc3 Do you see the mate threat? 16...Bf6 17.Qb3 Bb2 18.Qb2 b5 (18...Ne8 19.Qc2=) 19.Be2 (19.Bb5 Nb5 20.Qb5 Ba6 21.Qc5 Bf1 22.Kf1 Qd3 23.Kf2 Ra4+=) 19...Be4 (19...Qe7 20.Ne5+= (worse is 20.Bb5 Nb5 21.Qb5 Ba6–/+)) 20.d3 (20.Rfc1 Qd5=) 20...Bb7 21.Rac1 Qe7 22.Qe5 Ne6 23.Rc3 Ra5 24.Rb3 (24.Qg3 Rfa8+=) 24...Rfa8 Attacks the isolani on a3 25.Rfb1 (25.Rf2 b4 26.ab4 cb4+=) 25...f6 (25...Bc6 26.Qc3+=) 26.Qc3 Nc7 27.e4 Bc6 28.Nh4 (28.Rf1 Bd7 29.Rc1 Ne6+=) 28...Bd7–/+ 29.Rc1 R8a7 30.Qc5 Qc5 Black is in command 31.Rc5 Ne6 32.Rcc3 Nd4 33.Rb2 Ne2 34.Re2 Ra3 35.Ra3 Ra3 36.Rd2 (36.d4 b4 37.Rb2 b3–+) 36...b4–/+ 37.Kf2 b3 38.Rd1 Bb5 39.Nf3 b2 With the decisive threat Ra1 40.Rb1 Bd3 41.Rb2 Be4 42.Nd4 (42.Rb4 Ra2 43.Kg3 Re2–/+) 42...Kf7 43.Nb3 (43.Rd2 f5–/+) 43...f5 44.Nc5 Ba8 45.Rc2 (45.Nb7 g5–/+) 45...g5 46.Re2 Rc3 47.Ne6 (47.Nd7 h5–/+) 47...Kf6 48.Nd4 (48.Nf8 Rc7–/+) 48...Bd5 49.Rd2 (49.Nb5 Rc5 50.Nd6 h5–/+) 49...Be4–+ 50.Ra2 (50.Nb5 Rd3 51.Rd3 Bd3–+) 50...h5 51.Ne2 Rc5 52.Nd4 Bd5 (52...h4 53.Nf3–+) 53.Rd2 (53.Re2 Rc1–+) 53...f4 54.g3 (54.Re2 g4–+) 54...Rc3 (54...Ke5 55.gf4 gf4 56.Nf3 Bf3 57.Kf3 Rc3 58.Kf2–+) 55.Ne2 (55.gf4 gf4 56.Nb5 Rf3 57.Ke2 Re3 58.Kf2 Ke5–+) 55...Rf3 56.Kg1 Ke5 57.gf4 (57.Rd1 h4–+) 57...gf4 58.Rd4 Be6 59.Rd1 (59.Rd8 Bh3 60.Rd1 Ke4–+) 59...Re3 60.Nd4 Bc4 61.Kf2 (61.Nc2 Rb3–+) 61...Ke4 62.h4 (62.Rd2 h4–+) 62...Rc3 63.Kg1 Rd3 64.Rd3 Bd3 (64...Bd3 65.Ne6 Ke3–+) 0–1. Schulz,Hans_Juergen – Perlitz,Heiko, TT–10. ETC, 2004.

5.b5 b6 6.Nc3 Bb7 7.d3 ed3 8.Qd3 (8.Nf3 de2 9.Be2 Be7=) 8...Be7 9.Nf3 0–0 (9...d6 10.e4+=) 10.e4 d6 11.Be2 Nbd7 12.0–0 Re8 13.Rfe1 (13.Qe3 Bf8 14.Bd3 g6=) 13...Ng4 (13...g6 14.Nd2+=) 14.Rad1 (14.Qd2 h6+=) 14...Nge5 (14...Nde5 15.Ne5 Ne5 16.Qc2+=) 15.Ne5 Ne5 16.Qd2 Qc8 (16...Ng6!?+=) 17.Nd5+/– Bd5 18.Qd5 Qe6 (18...a6 19.f4 Ng6 20.Bh5+/–) 19.f4 Qd5 20.Rd5 Ng6 21.g3 White prepares the advance e5 21...a6 (21...Bf6 22.Bf6 gf6 23.Bf3+–) 22.ba6 Ra6 23.e5 de5 24.f5 Nf8 25.Re5 Nd7 26.Re3 Raa8?? (better is 26...Nf6+/–) 27.Bf3+– (27.Bf3 Rad8 28.Re7 Re7 29.Re7+–) 1–0. wiking – Pagano, internet, 2010.

5.b5 b6 6.Nc3 Bb7 7.d3 Be7 (7...ed3!? 8.Qd3 a6=) 8.de4+/– 0–0 (8...Ne4 9.Ne4 Be4 A) worse is 10.Bg7 Rg8 11.Be5 Rg2= (11...Bg2? 12.Bg2 Rg2 13.Qd5+–); B) 10.f3+/–) 9.e5 Ng4 (9...Ne4 10.Ne4 Be4 11.f3+/–) 10.Nd5 d6 (10...f6!? 11.Ne7 Qe7+/–) 11.Ne7+– Qe7 12.Qd6 Qg5 (12...Qh4 13.g3 Qg5 14.Nf3+/–) 13.Nf3 (better is 13.Qc7 Bc8 14.h3+–) 13...Bf3? (better is 13...Qf5+–) 14.ef3 Rd8 15.h4 (15.f4 Qh4 16.g3 Rd6 17.gh4 Rd8+–) 15...Qf4?? (15...Rd6 16.hg5 Nf2 17.ed6 Nh1+–) 16.Qd8 1–0. pierre – well_done, chesshere.com, 2008.

5.Qc2 Nc6 6.Bf6 (6.Nc3 A) 6...Be7 7.e3 (7.Ne4 cb4 8.c5 0–0 9.Ng5 g6 10.ab4=) 7...cb4 8.Ne4 0–0 9.Bd3 Kh8 10.Nf6=; B) 6...e3 7.Nd5 (7.de3 cb4 8.Ne4 Be7 9.Nf6 Bf6 10.Qe4=) 7...ef2 8.Kf2 Ng4 9.Ke1 d6 10.Qe4=; C) 6...cb4 7.Ne4 Be7 8.c5 0–0 9.Ng5 g6 10.ab4=) 6...Qf6 (worse is 6...gf6 7.Qe4 Be7 8.bc5+– f5 9.Qe3 d6 10.cd6+–) 7.Qe4 (7.Nc3 cb4 8.Qe4 Qe6 9.ab4 Bb4 10.Qd3+=) 7...Be7 (7...Kd8 8.Nc3 cb4 9.ab4 Bb4 10.Rc1+=) 8.Nc3 0–0 (better is 8...cb4!? 9.ab4 Nb4+= 10.Ra4+=) 9.bc5+= Bc5 10.e3 d6 11.Bd3 g6 12.Nf3 Bf5? (better is 12...Be6+/–) 13.Qf4+– Ne7? (13...Ne5 14.Bf5 gf5 15.Qg3 Ng6+–) 14.g4 g5 (14...b5 15.gf5 bc4 16.Bc4+–) 15.Ng5 Ng6 (15...Qc3 16.dc3 Bd3 17.Ne4 Be4 18.Qe4+–) 16.Qf5 Qg7 17.Be4 Rae8 18.d4 Bb6 (18...Bd4 19.ed4 Qd4 20.Rc1 Qc4 21.h4+–) 19.0–0 Qh6 (19...Bd8 20.Nf3 Ne7 21.Qg5 Qg5 22.Ng5+–) 20.Bb7 (20.Bd5 Re7+–) 20...Nh4 (20...Ne7 21.Qb5 Rb8 22.Bd5+–) 21.Qf4 (better is 21.Qd5 Qg6 22.Kh1 Re7+–) 21...Ng6 22.Qf5 Nh4 23.Qf4 (better is 23.Qd5 Qg6+–) 23...Ng6 24.Qf5 (better is 24.Qf3 Qg5 25.Ne4+–) 24...Nh4= ½–½. mtrc – Number12, internet, 2002.

5.e3 b6 6.bc5= Bc5 7.Nc3 Bb7 8.Nb5 0–0 9.Bf6+= Qf6 10.Nc7 Nc6 11.Na8 Ra8 12.g3 Rd8 13.Bg2 Ne5=+ 14.d4 (14.d4 Nd3 15.Kd2 Nf2 16.Qf1 Bd4 17.ed4 Qd4 18.Kc2–+). wlittle (2230) – rpatru (2115), net–chess.com, 2004.

5.Bf6 gf6 6.Qc2 f5 7.Qb2+=.

5.Bf6 gf6?! 6.Nc3=.

5.Bf6 Qf6 6.Nc3 cb4?! 7.Nd5 Qc6 8.ab4=.

5.Bf6 Qf6+= 6.Nc3 Qd8 7.Qb1 (7.bc5 f5+=) 7...f5= 8.Nd5 Nc6 (8...Bd6 9.d3 ed3 10.Qd3=) 9.g4+= Ne7 10.gf5 Nd5 11.cd5 Qh4 12.Bg2 cb4 13.ab4 (13.a4 Qf6+=) 13...e3 14.de3 Qb4 (14...Bb4 15.Kd1+=) 15.Qb4 (15.Kd1 Qb1 16.Rb1 a5+=) 15...Bb4= 16.Kd1 d6 17.e4 a5 18.Nf3 g6 19.Bh3 Rf8 (19...Bc5 20.e3+=) 20.Ng5 (20.Rg1!?+=) 20...gf5= 21.Nh7 Rh8 22.Ng5 Rh5 23.f4 fe4 24.Bc8 Rc8 25.Rc1 (25.e3 Ke7+=) 25...Rc1 26.Kc1 e3 27.Kc2 Bc5 28.h3 (28.Ne4 Ke7 29.Rb1 Rd5 30.Rb7 Ke6+=) 28...a4 29.Rb1 b6 30.Kd3 Ke7 31.Ke4 Kf6 32.Ne6 Rh3 33.Nc5 bc5 (worse is 33...dc5 34.Rb6 Ke7 35.Ra6+–) 34.Rb6 ½–½. Blankenberg,Bruno – Luzuriaga,Norberto Horacio, 2. B4 Thementurnier, 2000.

5.Bf6 Qf6+= 6.Nc3 e3 7.fe3 cb4 8.ab4 Bb4 9.Nd5+=.

5.Bf6 Qf6 6.Nc3 e3 7.fe3 cb4 8.Nd5 Qh4 9.g3 Qc4 10.Bg2 Na6 (10...ba3? 11.Rc1 Qc1 12.Qc1+–) 11.ab4 Bd6 (11...Nb4? 12.Rc1 Qd5 13.Bd5 Nd5 14.e4+–) 12.Nh3 0–0 (12...Rb8 13.0–0 Bb4 14.Ng5+/– (14.Nb4?! Qb4 15.Ng5 f6=)) 13.0–0+= Be5 (13...f5!?+=) 14.d3+/– Qg4 15.Rc1 (better is 15.Ne7 Kh8 16.d4+/–) 15...d6? (15...Bb2 16.Ne7 Kh8 17.Rc8 Rfc8 18.Nc8 Rc8 19.Rf7 Qb4=) 16.b5+– Nc5 17.d4 Qh5 18.Nhf4 (18.dc5?! Bh3 19.cd6 Rfd8 20.Bh3 Qh3 21.Ne7 Kh8=; 18.de5?! Bh3 19.Nf4 Qe5 20.Nh3 a6+–) 18...Bf4 19.Nf4 (19.Rf4?! Ne6 20.Rf5 Qh6+=; 19.gf4?! Nd7+=; 19.dc5?! Bg5 20.cd6 Qh6+=) 19...Qg5 20.dc5 dc5 21.Qd5 (21.Qd5 Qd5 22.Nd5+–) 1–0. Kuhlmann,Antonius Egidius J – Cottarelli,Franco, corr ICCF TT–4–90, 1990.

5.Bf6 Qf6 6.Nc3 e3 7.Nf3 ed2 (worse is 7...cb4 8.Nd5 Qc6 9.Nb4 ef2 10.Kf2 Qb6 11.d4=) 8.Kd2 cb4+=.

5.b5 a6

6.Qa4 d5 7.cd5+= Bd7? (7...Nbd7 8.ba6 Ra6 9.Bf6 Rf6+= (worse is 9...gf6 10.Qe4 Qe7 11.Qc2+/–)) 8.Nc3+– Bd6 9.Ne4 0–0?? (better is 9...Bb5 10.Qc2 Ne4 11.Bg7 Qh4+–) 10.Bf6 gf6 (10...Qc7 11.Bc3 (worse is 11.Nd6 Qd6 12.Bc3 Qd5+–) 11...Re8 12.Nf3 ab5 13.Qa8 Re4 14.d4 cd4 15.Bd2+– (15.Bd4 Rd4 16.Qb8 Qb8 17.Nd4 Qc7–+)) 11.Nd6 Bg4 (11...Qe7 12.Qf4 ab5 13.Nb7 Na6+–) 12.Qg4 (12.Qg4 Kh8 13.Qf4 ab5 14.Nb5+–) 1–0. marre – mqih, internet, 2010.

6.Qa4 Bd6!?+=.

6.Qa4 Be7 7.Nc3 0–0 8.f3 ef3 9.Nf3 d5 10.cd5 Nd5 11.Nd5 Qd5 12.e4 Qh5 13.Be2 Bg4 14.0–0 Nd7 15.ba6 ba6 16.h3 (16.Ba6? Qg6–+) 16...Bf3 17.Bf3 Nb6 18.Qc2 Qg6 19.Rab1 Rad8 20.Be2 Nd7 (20...c4 21.Rf5= (21.Bc4?? Nc4 22.Qc4 Rd2–+)) 21.Bd3 Nb8 22.Ba1 Nc6 23.Rb7 Bd6?? (better is 23...Qg5 24.Rf5 Qh6+=) 24.e5+– (24.Ba6?! Qg3+=) 24...Qg3 (24...Qh6 25.ed6 Rd6 26.Rc7+– (26.Ba6?! Nd8+/–)) 25.ed6 Rd6 (25...Nd4 26.Bh7 Kh8 27.Bd4 cd4 28.Rbf7 Rf7 29.Rf7 Qd6+–) 26.Bh7 Kh8 27.Rbf7 Rf7 28.Rf7 (28.Rf7 Rd8 29.Bg7 Qg7 30.Rg7 Kg7 31.Qg6 Kf8 32.Qf6 Ke8 33.Qc6 Ke7 34.Qc5 Ke6 35.Bf5 Kf7 36.Qc4 Kf8 37.Qe6 Rd2 38.Qh6 Ke7 39.Qd2+–) 1–0. pierre – oppotz, internet, 2010.

6.ba6 Ra6 (6...ba6 7.d3 (7.Nc3 Nc6 8.Rb1 Rb8 9.e3 Bb7 10.d3=) 7...ed3 8.Qd3 Nc6 9.Nd2 Rb8 10.Rb1=) 7.Qc2 (7.d3 d5 8.cd5 e3 9.fe3 Nd5 10.Qd2=; 7.e3 d6 8.Qc2 Bf5 9.Ne2 Nbd7 10.Ng3+=; 7.Nc3 Bd6 8.Qc2 Be5 9.Nd5 Bb2 10.Qb2=; 7.Bf6 Qf6 8.Nc3 Qe5 9.Nd5 Be7 10.e3=) 7...Qe7 8.e3 b6 (8...Nc6 9.Ne2 Na5 10.Ng3+/–) 9.Bf6 gf6 10.Nc3 Bb7 11.Nge2 Qe5 12.Ng3 f5 13.Be2 Bg7 14.Nh5 Rg8 15.0–0 Kf8 16.f3 Bh6 17.Rab1 Rg6 18.Rb3 Nc6 (18...f4!? 19.fe4 fe3=) 19.fe4+/– Na5 20.Rbb1 Be4 21.Ne4 Qe4 22.Qe4 fe4 (22...fe4 23.Nf6 Bg7 24.Ne4 Be5+–). Pleschke,Helmut – Luzuriaga,Norberto Horacio, email, 2000.

6.Nc3 ab5 7.Nb5 Nc6=.

6.Nc3 ab5 7.Nb5 Be7 8.Qc2=.

6.Nc3 d5 7.cd5 Bf5 (7...ab5 8.Qc2 Bf5 9.f3=) 8.Qb3 Qb6 9.e3 Bd6 10.Rc1 0–0 (10...Nbd7 11.Na4 Qd8 12.ba6 ba6 13.Bf6 Qf6 14.Nb6 Nb6 15.Qb6=) 11.Na4+/– Qc7 12.ba6 (12.Bf6 gf6 13.b6 Qe7+/–) 12...ba6 (12...Na6 13.Bf6 gf6 14.f3+=) 13.h3 (better is 13.Bf6!? gf6 14.f3+/–) 13...Nbd7= 14.Be2 Rfb8 15.Qa2 Qa5 16.Nc3 Rb7 17.g4 Bg6 18.f4 h6 (better is 18...ef3!? 19.Nf3 Rab8+=) 19.h4= Rab8 20.Ba1 Rb3 21.a4 c4 (21...R3b4 22.h5 Bh7 23.g5+=) 22.Bc4 (better is 22.g5!? Ba3 23.Bc4 Bc1 24.Bb3+–) 22...Ra3= 23.Qc2 Rb4 The pressure on the isolated pawn grows (23...Rc8 24.h5 Bh7+=) 24.Ba2 (24.Be2+=) 24...Qb6?? (24...Nc5 25.f5 Nd3 26.Ke2 A) worse is 26...Nc1 27.Qc1 Rba4 28.Na4 Qa4 29.Bf6 (29.fg6 Qb5 30.Qc4 Qc4 31.Bc4 Ra1+=) 29...gf6 30.Bb1+/– (worse is 30.fg6 Ra2 31.Qc6 Qc6 32.gf7 Kf7 33.dc6 Bb4+=); B) 26...Bh7–/+) 25.g5 (25.h5 Bh7 26.g5 Ng4 27.gh6 gh6+/–) 25...hg5 (25...Nh5 26.Nb1 Ra2 27.Qa2=) 26.hg5 Ng4 27.Nge2 (27.Rh4!? Bf5 28.g6+/–) 27...Nc5+= 28.Nd4 (better is 28.0–0+=) 28...Nd3–/+ 29.Kf1? (29.Ke2 Rd4 30.Rcg1 Nf4 31.Kf1 Rd2 32.Qd2 Ne3 33.Ke1 Nd3 34.Ke2–+) 29...Nc1–+ 30.Ne4?? (30.Qc1 Ra2! 31.Ke2 Ra3 32.Qa3 Rd4–/+) 30...Ra2 31.Qc8 Bf8 32.Nc6 Re4?? (32...Ne3 33.de3 Rf2 34.Nf2 Qc5+–) 33.Rh8!! Kh8 (33...Kh8 34.Qf8) 34.Qf8 1–0. Bender,Wolfgang (1755) – Zimmer,Bernhard, Saarlouis op 6th, 2003.

5.b5 d5

6.cd5 Qd5 7.Bf6 gf6 8.Nc3 Qe5 9.Qc2 f5+=.

6.cd5 Qd5 7.Bf6= gf6 8.Nc3 Qe5 9.e3 Nd7 10.d4 Qe6 11.d5+=.

6.cd5 Qd5 7.Bf6= gf6 8.Nc3 Qe5 9.e3 Be6 10.Nge2 (10.f4 Qf5=) 10...c4 (10...Nd7 11.Qc2 Bf5 12.Ng3+/–) 11.Nd4+= Nd7 12.a4 (12.f4 ef3 13.Qf3 Nc5+=) 12...Nc5 (12...Bc5 13.Qe2 Bd4 14.ed4 Qd4 15.Qe4=) 13.Ne6 (13.f4 Qd6=) 13...Qe6 14.f3 (14.a5 Bd6+=) 14...f5+= 15.f4 (15.Rc1 Rd8+=) 15...Bg7 16.Ra3 (16.Rc1 Rd8+=) 16...0–0 (16...Rd8 17.a5+=) 17.Be2 (17.Qh5 Rfd8+=) 17...Nd3 (17...Rfd8 18.0–0+=) 18.Bd3+= cd3 19.Qb3 (19.a5 Rfc8+=) 19...Rac8 20.Qe6 fe6 21.Kf2 Bc3 22.dc3 (22.Rc3 Rc3 23.dc3 Rc8–/+) 22...Rc4 (22...Rfd8 23.Rd1–/+) 23.Rc1 (23.Ke1 Rd8–/+) 23...Rfc8 (23...Rd8 24.a5–/+) 24.Ke1 Rb4 (24...Kf7 25.Kd2–/+) 25.Ra2 (25.Rd1 Rb2 26.Rd2 Rb1 27.Rd1 Rd1 28.Kd1 Rc5+=) 25...Rb3 26.c4 b6 (26...Rc5–/+) 27.a5 (better is 27.g4!?–/+) 27...Rb5!–+ 28.cb5 Rc1 29.Kd2 Rb1 30.ab6 ab6 31.h3 (31.g3 Rb5 32.h3 e5–+) 31...Rb5 32.g4 Kf7 (32...Ra5 33.Rb2 b5 34.Kc3–+) 33.g5 (33.Ra7 Kg6–+) 33...Rc5 (33...Ra5 34.Rb2 b5 35.h4–+) 34.h4 (34.Ra7 Kg6–+) 34...Kg6 (34...e5 35.Ra7 Kg6 36.fe5 Rc2 37.Kd1–+) 35.Ra7 e5 36.h5 (36.fe5 Re5 37.Ra6 Rb5–+) 36...Kh5 37.Rh7 Kg6 (better is 37...Kg4!? 38.fe5 Rc2 39.Ke1 Kg5 40.Rg7 Kh4 41.e6–+) 38.Rh6 Kg7 39.Rb6 (39.fe5 b5 40.e6 Rc2 41.Kd1 Rg2=) 39...ef4 (39...Rc2!? 40.Kd1 ef4 41.ef4–+) 40.ef4 Rc2 41.Kd1? (41.Ke3–+) 41...Rf2 (41...e3 42.Rb1 Rg2 43.Rb7 Kg6 44.Kc1 Rg1 45.Kb2–+) 42.Rb7 Kg6 43.Rb6 Kh5 44.Rh6 (44.Re6 Kg4 45.g6 Rg2–+ (worse is 45...Kf4 46.Kc1–+; 45...Rf4? 46.g7+–)) 44...Kg4 45.g6 Kf4 46.Rh4 Ke3 47.Rh3 Kd4 (47...Rf3 48.Rf3 Kf3 49.g7+–) 48.Rg3 (48.Ke1 Rg2 49.Rh6–+) 48...e3 49.Ke1 d2 50.Kd1 Rf1 0–1. Gottert,H – Turcan,Milan (2210), Sala op Slovakia, 1994.

6.cd5 Qd5 7.Bf6 gf6 8.Nc3 Qe5 9.e3 f5= 10.Rc1 (10.Nge2=) 10...f4 (10...Be6!?=) 11.ef4+/– Qf4 12.Qa4 Qe5 (12...Be6 13.g3 Qe5 14.Qe4 (worse is 14.Ne4 f5–/+) 14...Qe4 15.Ne4+/–) 13.Qe4 (worse is 13.Ne4 f5 14.Bd3 fe4 15.Be4 Bf5–/+) 13...Qe4 14.Ne4 Nd7 15.Nf3 Rg8 16.Ne5 (16.Rc3 Be7+/–) 16...Be7 17.f4 b6 18.Rc3 (18.g3 a6 19.Bc4 Ne5 20.fe5 ab5 21.Bb5 Kf8+=) 18...Bb7 19.Re3 (19.Nc6 Nf6 20.Re3 Ne4 21.Re4 Kf8+=) 19...Ne5 20.fe5 0–0–0 (20...Rg4 21.Ng3+=) 21.g3+/– Bg5 (21...Rd5 22.Bh3 Kd8 23.e6+=) 22.Ng5 Bh1 23.Nf7 The passed pawn on e5 will become decisive later 23...Rd4 (23...Rdf8 24.Bc4 Kc7 25.h4+–) 24.Bd3 Bd5 25.Bf5 (25.Nd6 Kd8+/–) 25...Kc7 26.Nd6 h6 (26...Rd8 27.g4+/–) 27.h3 (27.Ke2 Rd8+/–) 27...Rf8 (27...Rd8 28.g4+/–) 28.g4 Rd8 29.Kd1 Rf4 30.Kc2 Rf2 (30...Rd6 31.ed6 Kd6 32.Kb2+=) 31.Rd3 (31.Be4 Be4 32.Ne4 Rh2+/–) 31...Bf3 (31...Bg2 32.h4+/–) 32.Kc3 Bg2 33.h4 Bf1 34.Re3 Rf8 35.d4 (35.d3 Bg2+/–) 35...Ra2 36.Kb3 Rd2 (36...Re2 37.Re2 Be2 38.dc5 bc5 39.g5 hg5 40.hg5+/–) 37.Re1 Bg2 38.dc5 bc5 39.Kc3 Rd4 40.Re3 Rf4 41.Rd3 Bf1 42.Rd5 Rf3 43.Kd2 c4 44.Rc5 (44.a4 Bd3 45.Rc5 Kb8+–) 44...Kb8 45.Rc6 (45.a4 Ra3+–) 45...Rd8 (45...Ra3 46.e6 (46.Nc4?! Bc4 47.Rc4 h5+/–) 46...Ra2 47.Kc3+–) 46.a4 Bd3 47.Be6 Rg3 48.Nf7 (48.Bc4?! Be4 49.Rc5 Bf3+/–; 48.Rc4 Bc4 49.Bc4 Rg4–+) 48...Rf8 49.h5 (49.Nh6? c3 50.Kc3 Bb5 51.Kd4 Bc6–+) 49...Rh3 (49...Bh7 50.Bc4 (50.Nh6 c3 51.Rc3 Rd8 52.Ke1 Rc3–+) 50...Rg4 51.e6+– (51.Rh6?! Bg8 52.Be2 Rg2+/–)) 50.a5 White intends b6 (50.Bd5 Be4 51.Be4 Rf7 52.Rh6 Rf2 53.Ke1 Ra2 54.Rh8 Kc7 55.Rh7 Kb6 56.a5 Kc5–+) 50...Rg3 (50...Bf1 51.a6+– (51.Nh6 Rf2 52.Ke1 Re2 53.Kd1 Rd3 54.Kc1 Ra3–/+)) 51.b6 (51.Bc4? Bc4 52.Rc4 Rf7–+) 51...ab6 52.ab6 (52.Rb6 Kc7 53.Bd5 c3 54.Kc3 Be4 55.Kd4 Bd5 56.Kd5 Rf7 57.Rc6 Kb7 58.Rh6 Rg4 59.a6 Ka7–/+) 52...Re8? (better is 52...Bf1+–) 53.Bc4 (53.Nh6 Re6 54.Re6 c3 55.Ke1 c2=) 53...Bc4 54.Rc4 Rf8 (54...Rf3 55.Nd6 (55.Nh6?! Re5 56.Nf5 Kb7+–) 55...Ref8 56.Rc7+–) 55.e6 (55.Nh6?! Rf2 56.Ke1 Ra2=) 55...Rg2 56.Kd3 (56.Ke3 Re8 57.Re4 Rb2+–) 56...Rg3 57.Kc2 (57.Ke2 Re8 58.Re4 Rb3 59.Nh6 Rb6+–) 57...Re3 58.Rc6 (58.Nh6 Rf2 59.Kd1 Rh3–/+) 58...Re8 (58...Kb7 59.Rd6 Ra8 60.Kd1+– (60.Nh6?! Ra2 61.Kb1 Rg2=)) 59.Nh6 R3e6 (59...Kb7 60.Rd6 R8e6 61.Nf5+–) 60.Re6 Re6 61.Ng8 Rc6 62.Kd3 Rb6 63.h6 Rb7 (63...Rb3 64.Ke4+–) 64.g5 Rd7 65.Ke4 Re7 (65...Ra7 66.g6 Ra4 67.Ke5 Ra5 68.Ke6 Ra6 69.Kf7 Ra7 70.Kf8 Ra1+–) 66.Ne7 1–0. b4_player – opponent, gamecolony.com, 2007.

6.cd5 Nd5 7.Qc2 Bf5 8.Nc3 Nc3 9.Qc3+=.

6.cd5 Nd5 7.Nc3+=.

6.cd5 Nd5 7.e3 Nd7 8.Bc4 (8.d3!? N7f6 9.de4 (9.Nd2 Qa5 10.de4 Ne4 11.Ngf3 Bf5=) 9...Ne4 10.Nd2= Qa5 11.Ngf3 Bf5=) 8...N7b6+= (8...Qg5 9.Bd5 Qd5 10.Qc2 c4 11.Nc3 Qe6=) 9.Bb3 (9.Bd5 Nd5 10.Ne2 Be6 11.Ng3 Qh4+=) 9...Qg5 10.g3 Bd7 (10...Be6 11.Nc3 Nc3–/+) 11.Qe2 Qg6 (11...Rc8–/+) 12.Nc3 Nc3 13.Bc3 Bd6 14.f4 a6 15.a4 ab5 16.ab5 Ra1 17.Ba1 0–0 18.Qf1 Ra8 19.Bc3 Ra3 20.Bc2 Nd5 (20...f5!? 21.Bd1–+) 21.Qc4–/+ Be6 22.Qe4 Nc3 (worse is 22...Rc3 23.dc3 Nc3 24.Qg2+/–) 23.dc3 Rc3 24.Qg6 hg6 25.Bd1 Re3 26.Kf2 Ra3 27.Bf3 c4 28.Bb7?! (28.h4–+) 28...Bc5 29.Ke2 Bf5 30.Kd2 (30.Ke1 c3 31.Nh3–+) 30...c3 31.Ke1 0–1. Kessler,Meinrad – Vornanen,Alpo, TT–10 ETC, 2003.

6.cd5 Nd5 7.e3 Bf5 A) 8.Ne2 Nd7 (8...Bg6 9.Nbc3 Nc3 10.dc3 Nd7 11.Nf4 Nf6=) 9.Ng3 Bg6 10.Nc3 Nc3 11.Bc3 Nb6=; B) 8.Nc3 Nf6 9.f3 Nbd7 10.fe4 Ne4 11.Nf3 Nb6=.

6.e3 d4 7.ed4 cd4 8.d3 e3 (8...Bc5 9.de4 Ne4 10.Bd3= Qe7 11.Qe2 Bf5) 9.fe3 de3 10.Nf3 (10.Qf3 Bc5= 11.Ne2 Bb6; 10.Qe2 Ng4 11.Nf3 Bf5) 10...Bd6 11.Be2 0–0 12.0–0 Re8 13.d4 Bg4 14.Nc3 b6 15.h3 (15.Ne5 Be5 16.de5 Qd1 17.Rad1 Be2 18.Ne2 Ne4+/–) 15...Bh5 (15...Bc8 16.Bd3 Bg3 17.Qc2+=) 16.g4 Ng4 (16...Bg6!?+=) 17.hg4+/– Bg4 18.Bd3 f5 19.c5! bc5 20.dc5 (20.Bc4 Kh8 21.Bf7 Re7+/–) 20...Bc5+= 21.Ne2 Nd7 22.Qc2 Rf8 23.Nh2 Qg5 24.Qc4 (24.Ng4?! Qg4 25.Kh1 Qh3 26.Kg1 Qg4 27.Kh1 Qh5 28.Kg2 Bd6=) 24...Kh8 25.Ng4 fg4 (25...Qg4 26.Qg4 fg4 27.Rf5 Rf5 28.Bf5+/–) 26.Qe4 (26.Rad1 Rad8+/–) 26...Qh4+= 27.Rad1 Rf1 28.Rf1 Rf8 29.Rf8 (29.Rf4 Rf4 30.Qf4 h6+=) 29...Nf8 30.Qg2 h5 (30...Ne6 31.Bc4 Qe1 32.Qf1 Qf1 33.Kf1+/–) 31.Kf1+/– Bb6 (31...Qh3 32.Qh3 gh3 33.Nf4+/–) 32.Ng3 Ne6 33.Be5 Qd8 34.Qe4 Qf8 35.Qf5 Qf5 36.Nf5 Nc5 (36...Bc7 37.Bc7 Nc7 38.Ne3+–) 37.Bc2 Ne6 38.a4 Ng5 (38...Bc5 39.Ke2+–) 39.Bg7 (39.Bg7 Kg8 40.Bh6+–) 1–0. van Daatselaar,JB (2200) – Vermeulen,Jacques (2270), KE04 NBC Email, 2001.

5.b5 Be7

6.d3 0–0=.

6.e3 0–0 7.Nc3 a6 8.d3 Qa5 9.ba6=.

6.e3 0–0 7.Nc3 b6 8.d3 ed3 9.Bd3 Bb7 10.Nf3 d5 11.cd5 Nd5 12.Nd5 Qd5 13.Qc2 a6 14.Bh7 Kh8 15.Rd1 Qh5 16.Be4 Be4 17.Qe4 Ra7 18.ba6 Qh6 19.0–0 Na6 20.Rd5 Kg8 21.Rfd1 Nb8 22.Ne5 Qe6 23.Qf3 Rc8 24.Nd3 Nd7?? (better is 24...c4 25.Nf4 Qc6+/–) 1–0. Marinelli,Giorgio – McCarter,Robert, TG.1999.0.13053, 1999.

6.e3 0–0 7.Nc3 d5 8.cd5+= Nd5 (8...Bf5 9.d3+=) 9.Ne4 Bf5 (9...Be6 10.Rc1 Nd7 11.Qf3+=) 10.Qf3 Be4 (10...Be6 11.Rc1 Qb6 12.Qg3+=) 11.Qe4+/– Bf6 (11...Re8 12.Nf3+/–) 12.Bd3 The mate threat is Qxh7 12...g6 13.Bf6 Qf6 14.Rc1 Nb6 (14...Qd6 15.Bc4 Rd8 16.d4+/–) 15.Nf3 (15.Qb7 Qb2 16.Rc5 N8d7+/–) 15...N8d7 (15...a6 16.0–0 Qd6 17.ba6 Na6 18.Bb5+/– (18.Qb7?! Rfb8 19.Qa6 Ra6 20.Ba6 Ra8=)) 16.Be2 (16.Qb7 Qb2 17.0–0 Qa3+–) 16...a6+/– 17.ba6 (17.ba6 ba6 18.0–0+/–) 1–0. marekt – willow27, ChessWorld.net, 2007.

6.e3 a6 7.d3 ab5 8.de4 Ne4 9.Qc2+=.

5.Qc2 cb4

6.ab4 Bb4 7.Bf6 Qf6 8.Qe4 Qe6 9.Qd3 Na6 10.e3 Nc5+=.

6.ab4 Bb4 7.Bf6 Qf6 8.Qe4 Qe6 9.Qc2 Nc6 10.e3+=.

6.e3 ba3 7.Na3 Na6 8.Nb5 Nc5 9.Ra7 Ra7 10.Na7 Be7=.

6.e3 ba3 7.Na3 Nc6 8.Bf6 Qf6 9.Qe4 Kd8 10.Nc2 Nb4=.

6.e3 ba3 7.Na3 d5 8.Nb5 Bd6 9.Qa4 Ke7 10.Nd6+/–.

6.e3 ba3 7.Bf6 Qf6 8.Qe4 Kd8 9.Ra2 Na6 10.Bd3–/+.

6.e3 ba3 7.Bf6 Qf6 8.Qe4 Kd8 9.Nc3 Bb4 10.Qc2 b6+=.

6.e3 Na6 7.Bf6 Qf6 8.Qe4 Kd8 9.d4 ba3 10.Nf3 Bb4=.

6.e3 Na6 7.Bf6 Qf6 8.Qe4 Be7 9.d4 Nc5 10.Qf3=.

6.e3 Nc6 7.Bf6 Qf6 8.Qe4 Qe6 9.Qe6 de6 10.d4 b6=.

6.Bf6 gf6 7.Qe4 Qe7 8.Qe7 Be7 9.Nf3+= b6 10.ab4 Bb4+=.

6.Bf6 Qf6 7.Qe4 Be7 (7...Qe6 8.Qe6 de6 9.e3 e5 10.d4 ed4+=; 7...Kd8 8.d4 Bc5 9.e3 Re8 10.Qh7 Bd4+=; 7...Qe7 8.Qe7 Be7 9.e3 Nc6 10.d4 b6=) 8.d4 0–0 (8...Qc6 9.Qc6 dc6 10.e4 c5=) 9.a4 (9.e3 ba3 10.Nf3 (10.Bd3 Bb4 11.Kf1 Qh6=) 10...Bb4=) 9...Nc6 (9...d5 10.cd5 b3 11.Nd2+=) 10.Nf3 (10.e3 Re8=) 10...b6 (10...b3!?–/+; 10...Rd8–/+) 11.e3= Bb7 12.Bd3 g6 13.Nbd2 Rfe8 14.0–0 Bd6 15.Qg4 Na5 16.Qd7 Rad8 17.Qh3 Bf3 18.Nf3 b3 19.Rab1 Bb4 20.Rfd1 Bc3 21.Rdc1 Bb4 22.Rd1 Ba3?? (22...Bc3 23.Qg3 Qc6+–) 23.e4 b2 24.e5 Qe6 25.Qh4 Nc4?? (better is 25...Be7 26.Qe4 Nc4+–) 26.Ng5 Qd5 27.Be4 Qd7 28.Qh7 Kf8 29.Qh8 Ke7 30.Qf6 Kf8 31.e6 (31.Rd3 Ne5 32.de5 Kg8+–) 31...Re6 32.Ne6 Qe6 33.Qd8 Kg7 34.Bd5 Qe2 (34...Qd6 35.Qd6 (35.Bc4?! Qd8 36.Bb5 Kf6=) 35...Nd6 36.Rd3+–) 35.Qc7 Nd6 36.Qc3 1–0. mtrc – igorbor5, internet, 2002.

5.bc5 Bc5

6.Bc3 Nc6+=

6.d4 Be7+=.

6.e3 0–0 7.d3 d6=.

6.e3 0–0 7.f3 d5 8.Nc3 Be6 9.cd5= Nd5 10.Ne4+= Bb6 11.Rc1 Nc6 12.Ne2 Qh4 13.N2g3 f5 14.Nf2 f4 15.Qa4 Qe7 16.Nge4 fe3–/+ 17.de3 Be3 0–1. Bazza3 – willow27, ChessWorld.net, 2005.

6.e3 0–0 7.Bf6 Qf6 8.Nc3 Qc6 (8...Re8 9.Nd5 Qd6 10.d4=) 9.Nge2 (9.Nd5 b6=) 9...Na6 (9...Re8 10.Ng3 d6 11.Qb1=) 10.Qb1 f5 11.g4 d5 (better is 11...fg4!? 12.Bg2 Qf6 13.Ne4 Qf7+=) 12.cd5+/– Qf6 13.gf5 (13.Ng3 fg4 14.Nce4 Qe7+/–) 13...Bf5 14.Ng3 Increasing the pressure on the isolated pawn on e4 (worse is 14.Qb7 Bg4 15.Kd1 Rad8=) 14...Rae8 15.Bg2 (15.Qb7 Bg4 16.Be2 Be2 17.Nge2 Rb8+=) 15...Bd6 (15...Bg6 16.Nce4 Qf7 17.f4+/–) 16.Nce4 (16.Nge4 Qg6 17.Bf3 Nc5–/+; 16.Qb7? Bc8 17.Nge4 Re4 (17...Bb7?! 18.Nf6 Rf6 19.d4+=) 18.Ne4 Qa1 (18...Bb7 19.Nf6 gf6 20.d4+/–) 19.Ke2 Qe5–+ (19...Bb7?! 20.Ra1 Bd5 21.Nd6 Bg2 22.Rc1+=; 19...Qa3?! 20.Qa7 Bf5 21.h3–+)) 16...Be4 (16...Qg6 17.f4+/–) 17.Ne4 (worse is 17.Be4 Qf2 18.Kd1 h6+=) 17...Re4 18.Be4 Qf2 19.Kd1 g6 (19...Qh4 20.Bc2+/–) 20.Ra2 (20.Re1 Qh4 21.Bd3 Qh2 22.Ba6 ba6+/–) 20...Qh4 21.Bd3 (21.d3!?+–) 21...Nc5+= 22.Qc2 (22.Re1 Qh2 23.Bg6 Rf2 24.Bh7 Kh8+–) 22...Rf2 Can h2 get defended? 23.Qc3 (23.Be2 Rh2 24.Rh2 Qh2+/–) 23...Qh5 (23...Qg4 24.Kc2+=) 24.Kc1 Qf3 25.Rd1 (25.Re1 Rh2 26.Rf1 Rh1 27.Rh1 Qh1 28.Kc2 a6+=) 25...Rh2 26.Bc2 Re2 27.Rb2 b6 (27...Qd5 28.d4 Qf7 29.dc5 Re3 30.cd6 Rc3 31.d7+–) 28.Rb4 Qg3 (28...Qd5? 29.Rd4 Qe6 30.Rd6 Qd6 31.Qc4 Ne6 32.Qe2 Qa3 33.Kb1 Qb4 34.Ka2+–) 29.Kb1 (29.Qf6 Rf2 30.Qh4 Qh4 31.Rh4 Nd7+/–) 29...Qg5 30.Qc4 Qg2 31.Qh4 (31.Qg4 Kf7+/–) 31...Rf2 (31...Rd2!? 32.Rd2 Qd2+=) 32.Qd8+/– Bf8 33.d6 (33.d6 Rf1 34.Rf1 Qf1 35.Kb2+–) 1–0. Woelfelschneider,Peter – Perlitz,Heiko, TT–10 ETC, 2004.

6.e3 b6 7.d3 Bb7 8.Nd2=.

6.e3 d6 7.d3=.

4.a3 c6

5.Qc2 d5 6.cd5 cd5 (worse is 6...Qd5 7.Bf6 gf6 8.Nc3+/–) 7.Bf6 Qf6?? (better is 7...gf6 8.d3 a5=) 8.Qc8+– Qd8 9.Qb7 Nd7 10.e3 Rc8 11.Nc3 (11.Qa7?! Rc1 12.Ke2 Qc8=) 11...Be7 (11...f5 12.Nd5 Bd6 13.Bb5+–) 12.Qd5 Nf6 13.Bb5 Kf8 14.Qd8 Bd8 15.Nge2 Bb6 (15...Bc7 16.f3 ef3 17.gf3+–) 16.Ng3 g6 (16...Ke7 17.Nge4 Ne4 18.Ne4+–) 17.Nge4 Ng4 (17...Ne4 18.Ne4 Ke7 19.d4+–) 18.Bd7 (18.Bd7 Ra8 19.Bg4+–) 1–0. Woelfelschneider,Peter – Utzig, 2010.

5.c5 d5 6.d3 ed3 7.ed3 Be7=.

5.c5 d5 6.cd6 Bd6 7.Nc3 0–0+=.

5.c5 d5 6.cd6 Bd6 7.d3 ed3 (7...e3 8.fe3 Ng4 9.g3–/+) 8.Qd3+= 0–0 9.Nd2 Be6 (9...Qe7 10.Rd1=) 10.Ngf3 Nbd7?? (better is 10...Qe7=) 11.Qd6+– Nb6 (11...a5 12.b5!+–) 12.Qg3 (12.Qd8 Rfd8 13.Bf6 gf6+–) 12...g6 (12...Na4 13.Bd4+–) 13.e4 (13.Rd1 Re8+–) 13...Re8 14.Be2 Na4 (14...Nh5 15.Qe5 f6 16.Qd4+–) 15.Bf6 Qf6 16.e5 Qd8 (16...Qe7 17.Ne4 Red8 18.Nfg5+–) 17.Ne4 Nb2 (17...Re7 18.0–0+–) 18.Nf6 Kg7 19.0–0 (19.Ne8!? Qe8 20.Rb1 Nc4+–) 19...Re7 20.Qh4 h5 (20...h6 21.a4 Bd5 22.Nd5 cd5 23.Qf6 Kh7 24.e6+–) 21.Qg5 Qf8 (21...Bg4 22.Rab1 Na4 23.Rfc1+–) 22.Nh5 Kh7 23.Nf6 Kg7 24.b5 Rd8 (24...Bd5 25.Rfb1 Bf3 26.gf3+–) 25.Qh4 Qh8 26.Qb4 (26.Qb4 Rc7 27.b6 ab6 28.Qb6+–) 1–0. pierre – yjket, internet, 2009.

5.c5 d5 6.cd6 Bd6–/+ 7.e3 Bg4 8.Qc2 Bf5 9.Bc4 Nbd7 10.Ne2 0–0 11.0–0 Ne5 12.f3 (12.Nd4 Nc4 13.Nf5 Nb2 14.Qb2 Re8+=) 12...Nc4 13.Qc4 ef3 14.Rf3 Bd3 15.Bf6 Qf6 16.Rf6 Bc4 17.Rd6 Be2 18.Nc3 Bg4 19.h3 Be6 20.Ne4 b6 (20...a5 21.Rb1=) 21.Ng5 (21.Rc6 Bd5 22.Nf6 gf6 23.Rf6–/+) 21...Rad8 (21...Bd5 22.e4 Bc4 23.Rc6+/–) 22.Rc6+= Rd2 23.Ne6 fe6 24.Re6 Kf7 (24...Rff2 25.g4=) 25.Re4 Rd7 (25...Rfd8!?+=) 26.Rf1+/– Kg8 27.Rd4 Re7 28.e4 Rc8 29.a4 Rc3?? (better is 29...a6+/–) 30.Rd8 1–0. Gross,Wilhelm – Merten,Rainer, xvi/02, 1988.

5.c5 d5 6.e3 Bf5 7.h3 b6=+ 8.g4 Bd7 9.g5 Ng8 10.cb6 ab6 11.f4 f6 12.h4 Be7 13.Qh5 g6 14.Qd1 fg5?? 15.Bh8 gf4 16.Qe2 Bh4+= 17.Kd1 f3 18.Nf3 ef3 19.Qf3+= Qg5 20.Bh3 Qe7 21.Bd7 Nd7 22.Qh3 Bf6= 23.Bf6 Qf6 24.Nc3 Ne7 25.Qh7+/– 0–0–0 26.Qh4 Qf3 27.Kc2 Nf5 28.Qh7 Qg2? 29.Rae1 Ne5 30.Qa7+– Nc4 31.Qa8 Kd7 32.Rh7 Ke6 33.Qc6 Rd6 34.Qc8 Kf6 35.Re2 Qg3 36.Qf8 Ke6 37.Qg8 Kf6+– 38.Rhh2 Na3 39.Kb3 Nc4 40.Rhg2 Qe5 41.Rg6 Ke7 42.Qh7 Kd8 43.Rg8 Qe8 44.Re8 Ke8 45.Nd5 Rd5 46.Qg8 Kd7 47.Qd5 Ncd6 48.e4 Ne7 49.Qd4 Kc7 50.e5 Ndf5 51.Qc4 Kb7 52.d4 Ng3 53.Rg2 Ngf5+– 54.Qf7 Nd4 55.Kc4 Ndc6 56.Rg5 Ka6 57.b5 Ka5 58.bc6 Nc6 59.e6 Ka6 60.e7 Ne7 61.Qe7 b5 62.Kb4 Kb6 63.Rg6 1–0. bentengutama (1965) – bromer (1965), net–chess.com, 2003.

5.c5 d5 6.Be5!?+=.

5.c5 d6 6.cd6 Bd6 7.Qc2 Be6 8.g3 Nbd7 9.Bg2 Bd5 10.Nc3 Qe7 11.e3 a6 12.Nge2 h6 13.Nd4 0–0 14.Nf5 Qe6 15.Nd6 Qd6 16.Ne4 Be4 17.Be4 Ne4 18.Qe4 Qd5 19.Qd5 cd5 20.d3 b5 21.Rc1 Rac8 22.Kd2 Rb8 23.Rc7+– Nb6 24.Rhc1 Na4 25.Bd4 f6 26.Rd7 Nb6 27.Bb6 Rb6 28.Rcc7 Re8 29.Rg7 Kf8 30.h4 Rbe6 31.Rcf7 1–0. MrThayer (2135) – kingsbest, ChessWorld.net, 2003.

5.e3 a5 6.b5 d5 7.cd5 cd5 8.d3 Nbd7 9.Nc3 Be7 10.Nge2 Nc5 11.de4 de4 (worse is 11...Nfe4 12.Nd5 0–0 13.Ng3+/–) 12.Qd8 Bd8 13.Nf4 a4 14.Bc4 0–0 15.0–0 g5 16.Nfd5 Be6 17.Rad1 Rc8 18.f3 ef3 19.gf3 (worse is 19.Rf3 Nd5 20.Nd5 Ne4+=) 19...Re8 20.e4 Nd5 21.Bd5 (worse is 21.Nd5 Ne4 22.fe4 Rc4–/+) 21...Bc7 22.Rf2 Kf8 23.h4 (23.Rc2!?=) 23...gh4+= 24.Rg2 Red8 25.Rg5 Ba5 26.Nb1 Bd5 (26...h6 27.Bg7 Kg8 28.Bh6 Kh7 29.Rh5=) 27.ed5= (worse is 27.Rdd5 Ne6 28.Rg4 Rc2 29.Rd8 Nd8–/+) 27...Ne6 28.Rh5 Nf4 29.Rh7 (29.Rh4 Rd5 30.Rd5 Nd5 31.Rh7 Rc2–+) 29...Ke7 (worse is 29...Rd5 30.Rd5 Rc2 31.Rh8 Ke7 32.Re5 Kd6 33.Rh6 (33.Rh4? Rb2 34.Re4 Rb1 35.Kh2 Rb2 36.Kh1 Ne2–+) 33...Ng6 34.Rf5 Rb2 35.Rf7 Bb6 36.Kh1 Rb1 37.Kh2+/–; 29...Nd5?! 30.Rh8 Ke7 31.Rh4 Bb6 32.Kh1+=) 30.Rh4 Rd5 31.Rd5 Nd5 32.Re4 Kd7 33.Rh4 (better is 33.Kf1!?–/+) 33...Rc2 34.Rh2 Bb6 (34...Bb6 35.Kh1 Bf2–+) 0–1. Woschkat,Karl_Heinz (1890) – Taulien,Hans_Juergen (2350), remoteschach.de, 2002.

5.e3 a5 6.Qc2=.

5.e3 a6 6.Bf6 (6.d3 a5 7.b5 cb5 8.cb5 d5+=) 6...Qf6= 7.Nc3 d5 (7...Qe5 8.d4 ed3 9.Qd3+=) 8.cd5+= Bf5 9.Nge2 Bg4 (9...Bd6!?+=) 10.h3 (10.dc6 Qc6 11.Qc2 f5+–) 10...Bf5 (10...Be2 11.Be2 (11.Ne2?! cd5 12.Nc3 Qe5+=) 11...Qg6 12.0–0+/–) 11.Nd4 (11.dc6 Nc6 12.Ng3 Bg6+–) 11...cd5 (11...Bg6 12.Qc2+/–) 12.Nd5 Qe5 (12...Qd6!? 13.Nc3 Bg6+/–) 13.Nb6+– (worse is 13.Nf5 Qd5 14.Nd4 a5+/–) 13...Ra7 14.Rc1 Bd6?? (14...Nc6 15.Nc6 bc6 16.Rc6 a5+–) 15.Nf5 Qf5 (15...0–0 16.Nd6 Qd6 17.Nc8+–) 16.Rc8 Ke7 17.Rh8 a5 (17...Nc6 18.Nc8 Kd7 19.d3+–) 18.Nc8 (18.Nc8 Kf6 19.Na7 ab4 20.Nb5+–) 1–0. pierre – colly, internet, 2011.

5.e3 d5 (--> 3.e3 d5 4.a3 Nf6 5.c4 c6).

5.e3 Be7 6.Nc3 0–0 7.Qc2 d5 8.0–0–0 (better is 8.d3!? a5 9.b5 dc4 10.de4=) 8...a5–/+ 9.b5 Nbd7 10.d4 cb5 11.Nb5 dc4 12.Bc4 (better is 12.d5!? c3 13.Qc3+=) 12...Nb6–/+ 13.Kb1 Nc4 14.Qc4 Be6 15.Qc2? (better is 15.Qc7 Qd5 16.Nc3–+) 15...Rc8 16.Qd2 Qb6 17.a4 (17.d5 Bd5 (17...Nd5?! 18.Qd4 Qd4 19.Nd4–+) 18.Bf6 Bf6 (18...Qb5?! 19.Qb2 Bb3 20.Be7–+) 19.Qd5 Rc5–+) 17...Bb3 (better is 17...Bb4 18.Ba3 Bd2 19.Rd2 Bc4–+) 18.Rc1 Ba4 19.Nc3 Bb3 20.Nge2 a4 21.Na2 Ba2 22.Ka2 Qb3 23.Ka1 b5 24.Rc8 Rc8 25.Rc1 Rc4 Black plans b4 26.Rc4 Qc4 27.h3 (27.Kb1 a3 28.Ba1 b4–+) 27...a3 28.Bc1 b4 29.Ng3 (29.f3–+) 29...b3 30.Nf5 Bf8 (30...Bb4 31.Ne7 Kh8 32.Nd5 Bd2 33.Ba3 Qc2 34.Bb2 Qd1 35.Bc1 Qc1) 31.d5 (31.Bb2 Bb4 32.Qc1 Qc1 33.Bc1 Bc3 34.Bb2 Bb2 35.Kb1 Bc3 36.Kc1 a2 37.Ne7 Kf8 38.Ng6 Ke8 39.Kd1 a1Q 40.Ke2 Qe1) 31...Nd5 (31...Bb4 32.g3 Bc3 33.Qb2 ab2 34.Bb2 Qf1) 32.Nd4 b2 (32...Bb4 33.Bb2 Bd2 34.Nb3 Qb3 35.Bd4 Nc3 36.Bc3 Bc3) 33.Bb2–+ ab2 34.Qb2 (34.Kb2 Nb4 35.Kb1 Qf1 36.Kb2 Nd3 37.Ka2 Qg2 38.h4–+) 34...Qf1 (34...Qf1 35.Qb1 Qg2–+) 0–1. combijack (1795) – mesc (1700), gameknot.com, 2012.

5.e3 Be7 6.d3 d5 7.de4 de4 8.Qd8 Bd8 9.Ne2 0–0 10.Ng3 (10.Nd2 Nbd7=) 10...Re8 11.Nd2 Nbd7 12.Be2 Bc7 13.0–0 (13.Bd1 Ne5 14.Bc2 Be6=) 13...Bg3 (13...a5 14.c5+=) 14.hg3 a5 (14...Ne5 15.Rfd1 Bf5 16.c5+=) 15.c5 ab4 (15...Nd5 16.Nc4+=) 16.ab4+/– Ra1 17.Ra1 h5? (better is 17...b5!? 18.cb6 Nb6 19.Bf6 gf6+=) 18.Nc4+– Nd5 19.Nd6 Rf8 20.Ra8 Ne7 (20...Nb4 21.Bh5 Nd3 22.Bd4+– (22.Nc8 Nb2 23.Bg4 f5 24.Bf5 Nc5+=; worse is 22.Rc8 Rc8 23.Bf7 Kf8+=)) 21.Bh5 Nf6 22.Bf6 gf6 23.Rb8 (23.Ne4 Nd5+–) 23...Be6 (23...f5 24.Be2+–) 24.Rb7 Nf5 (24...Nd5 25.b5 cb5 26.Ne4+–) 25.Ne4 Kg7 26.g4 Nh4 (26...Nh6 27.g5 fg5 28.Ng5+–) 27.Nd6 Ng6 28.f4 Bd5 (28...Nh8 29.Nf5 Kh7 30.Ne7+–) 29.Bg6 Kg6 30.Rb6 (30.e4 Bb3 31.b5 cb5+–) 30...Ra8 (30...Kg7 31.e4 Be6 32.Rc6 Bg4 33.b5+–) 31.e4 Bb3 32.Rc6 Bd1 (32...Ra1 33.Kh2+–) 33.b5 Bg4 (33...Ra1 34.Kh2+–) 34.b6 Kh5 (34...Kg7 35.f5 Bd1 36.b7+–) 35.Nf7 Kh4 36.Kh2 Ra2 37.Rf6 Bf3 38.Rh6 Kg4 39.Ne5 Kf4 40.Nf3 Kg4 41.Rh4 1–0. b4_player – Jack_D, gamecolony.com, 2006.

5.g3 d5 6.d3 (6.Bf6!? Qf6 7.Nc3+=) 6...dc4 (6...a5 7.de4 de4 8.Qd8 Kd8 9.b5+=) 7.dc4 Qd1 8.Kd1 Be7 (8...a5 9.ba5 Nbd7 10.Bh3–/+) 9.Bg2 Bf5 (9...0–0 10.Nd2 Bf5 11.e3+=) 10.e3 (10.Bh3 Bg6–/+) 10...Nbd7 (10...a5 11.ba5 Nbd7 12.Ne2–/+) 11.Ne2+= c5 (11...a5 12.c5+=) 12.b5 (12.Kc2 0–0+=) 12...Nb6–/+ 13.Nd2 0–0–0 14.Kc2 Ng4 (14...Na4 15.Bc3–/+) 15.Raf1+= (15.Be4?? Rd2 16.Kd2 Be4–+; 15.Bg7 Rd2 16.Kd2 Rg8+=; 15.Ne4?? Nf2 16.Bg7 Nc4 (16...Be4?! 17.Be4 Ne4 18.Bh8 Rd2 19.Kb3 Re2 20.Rae1 Nd2 21.Kc3–+) 17.Bh8 Ne4 (17...Be4 18.Be4 Ne4 19.Bd4–+) 18.Be4 Be4 (18...Ne3?! 19.Kb2 Be4 20.Bc3–+) 19.Kb3 Nd2 (19...Rh8 20.Kc4 Bh1 21.Rh1+=; 19...Ne3?! 20.Bc3–+) 20.Kc3 Bh1 (worse is 20...Rh8 21.Rhd1 Nf3 22.Kb3–+) 21.Rh1 Ne4 (21...Rh8?! 22.Kd2 Rd8 23.Kc2=) 22.Kb3 Rh8–+) 15...Bf6 16.Bf6 Nf6 17.Nc3 e4 draws heavy fire 17...Rd3 18.h3 (18.Nde4? Rc3 19.Kc3 Ne4 (19...Be4 20.Bh3 Kb8 21.f3–+) 20.Be4 Be4–+; worse is 18.Be4 Rd2! 19.Kd2 Ne4 20.Ne4 Rd8 21.Kc3 Be4–+) 18...Rhd8 19.Rd1 Be6 (19...h6 A) 20.Be4? Rc3 21.Kc3 Be4 (21...Ne4?! 22.Ne4 Be4 23.Rd8 Kd8 24.Rc1–/+) 22.Ne4 Ne4 23.Kb3 Nd2 24.Kc3 Nbc4–+; B) 20.g4 Bg6 B1) 21.Be4? Rc3 22.Kc3 Be4 (22...Ne4?! 23.Ne4 Be4 24.Rd8 Kd8 25.f3+=) 23.Ne4 Ne4 24.Kb3 Nd2 25.Kc3 Nbc4–+; B2) 21.Nde4 Ne4 22.Be4 Rc3 23.Kc3 Be4 24.Rd8 Kd8+=; B3) 21.Nce4? Na4 22.Rhe1 Rc3 (22...Ra3?! 23.f3–+) 23.Kb1 Rd2 24.Rd2 Ne4 25.Be4 Be4 26.Ka2 Bd3–+; B4) 21.Rhe1=) 20.Nde4+= (worse is 20.Nce4 Bf5 (20...Nc4?! 21.Nc4 Rd1 22.Rd1 Rd1 23.Ned6 Rd6 24.Nd6 Kc7 25.Nb7 Bh3 26.Bc6+=) 21.Kc1 Ra3–+; worse is 20.Be4 Rc3 21.Kc3 Rd2 22.Bb7 Kb7 23.Kd2 Nc4 24.Ke2 Na3–/+) 20...Rd1 21.Rd1 Ne4 22.Rd8 Kd8 23.Ne4 Nc4 24.Nc5 Na3 25.Kb2 Nb5 26.Ne6 fe6 27.Bb7 Nd6 28.Bg2 Kc7 29.Kc3 Kb6 30.h4 a5 31.h5 e5 32.Kb3 e4 33.Bf1 g5 34.hg6 hg6 35.Be2 Nb7 36.Bf1 Nc5 37.Kb2 a4 38.Be2 Nd3 39.Ka3 Nf2 40.Ka4 Nh1 41.g4 Ng3 42.Bc4 Kc5 43.Kb3 Nh1 44.g5 Nf2 45.Bf7 Nh3 46.Bg6 Ng5 47.Be4 (47.Kc3 Ne6=) 47...Ne4 ½–½. lletram22 (1930) – ovid7 (1765), gameknot.com, 2014.

5.d3 d5

6.cd5 Qd5? 7.Bf6+/– gf6 8.Nc3 Qf5 9.de4 Qe5 10.Qd3 Bg4 11.h3 (11.h3 Be6 12.Nf3+/–) 1–0. themonkey – NN, GameColony.com, 2002.

6.cd5 e3!? 7.dc6 ef2 8.Kf2 Nc6=.

6.de4 dc4 7.Qc2 (7.Qd8!? Kd8 A) 8.e5 A1) 8...Nfd7 A11) 9.Nf3 a5 10.Ng5 Ke7 11.Nd2 (11.e3 b5 12.ba5=) 11...b5= (11...ab4 12.Nc4=) 12.ba5=; A12) 9.Nh3 b5 10.Ng5 Ke7 11.e3 a5 12.ba5=; A13) 9.e4 b5 10.Nf3 a5 11.ba5 Nc5 12.Nc3+=; A14) 9.Nd2 b5 10.Ngf3 a5 11.ba5 Ra5 12.Ng5=; A15) 9.Bc3 c5 10.Nf3 cb4 11.ab4 Nb6 12.Na3=; A2) 8...Nd5 9.e4 Nf4 10.Nc3 Ke8 (10...a5 11.Rd1 Ke8 12.b5+=) 11.g3 Nd3= 12.Bd3=; B) 8.Nd2= b5 B1) 9.Rd1 Ke8 10.e5 Nd5 11.e4 (11.Ne4 a5 12.ba5+=) 11...Nf4= 12.Bc1=; B2) 9.Bc3 Ke8 10.Ngf3 Na6 11.Rb1 Bd7 12.Ne5=) 7...b5+= 8.e5 (8.Nc3 a5 9.Rd1 Qc7 10.ba5 Qa5 11.Ra1 Bc5–/+; 8.Nf3 a5 9.ba5 Qa5 10.Nfd2 Nbd7 11.e3 Nc5+=; 8.Nd2 a5 9.ba5 Ra5 10.e3 Bc5 11.Ngf3 0–0+=) 8...Nd5 (8...Nfd7 9.Bc3 c5 10.Nf3 Nb6 11.e4 cb4+=) 9.g3 (9.e4 Nf4 10.Nc3 Nd3 11.Bd3 cd3+=) 9...Nd7 (9...a5 10.e4 Nb6 11.ba5 Na4–/+) 10.e4 (10.Nf3 a5 11.e4 N5b6+=) 10...N5b6 11.f4 (11.Be2 a5+=) 11...c5 (11...a5–/+) 12.Bc3 Bb7 13.Bh3 Na4 14.Ne2 Qb6 (14...Ndb6!? 15.Bf5 A) 15...Nc3?! A1) 16.Qc3? g6 17.bc5 Bc5–+ (17...gf5?! 18.cb6 Qb6 19.Rf1–/+); A2) 16.Nbc3 a6 17.Rd1=; B) 15...Qd3–+) 15.Bd2 cb4 16.ab4 Qc6 17.Bg2 Qb6 18.Na3 Be7 (better is 18...Bc6!?=) 19.Nb5+/– Nac5 (better is 19...Qb5!? 20.Ra4 Nb6+/–) 20.Qc4+– Ne6 21.Nd6! (21.Nd6 Bd6 22.ed6 Qd6 23.Be3+–) 1–0. Hort – Roggensack_Hanspach, simultan, 1990.

6.de4 Ne4 7.Nc3 Bf5 8.cd5+= Nc3 9.Bc3 cd5 10.e3 a6 11.Nf3 Nc6 12.Bd3 Qd7 13.0–0 Bd6 (13...Be4 14.Rc1+=) 14.Bg7 Rg8 15.Bf5 Qf5 16.Bb2 0–0–0 17.Kh1 Qh5 18.Rc1 Rg6 19.Ne5 Qh6? (better is 19...Qd1 20.Rfd1 Be5 21.Be5 b6+–) 20.Qd5 Rdg8 (20...Kb8+–) 21.Ng6 (better is 21.Rc6 Bc7 22.Qd7 Kb8 23.Qc7 Ka8 24.Ng6 Qg6 25.Rg6 hg6 26.Rd1 Rb8 27.Rd8 Rd8 28.Qd8 Ka7 29.Bd4 b6 30.Qb6 Ka8 31.Qa7) 21…Qh2 0–1. Fournier,Frederic (1735) – Nguyenthanhquang (1675), rated blitz game (2/12), 2002.

6.de4 Ne4 7.Nc3 Nf6 8.Nf3 (8.cd5 cd5 9.Nf3 (9.Nb5 a5 10.Bf6 gf6 11.Qd5 Qd5 12.Nc7+=; 9.e3 a5 10.b5 Bd6 11.Nf3 0–0 12.Qd4+=) 9...a5 10.b5 Bd6 11.Qd4 Qe7 12.Nd5+/–; 8.e3 Be6 (8...a5 9.b5 Be6 10.Nf3 Nbd7 11.cd5 Nd5 12.Be2+=) 9.cd5 cd5 10.Nf3 a5 11.b5 Bd6 12.Be2+=) 8...Be7 (8...a5 9.b5 Bd6 10.cd5 cd5 11.e3 0–0 12.Be2+=; 8...dc4 9.Qd8 Kd8 10.Rd1 Ke8 11.Nd4 b5 12.g4+=) 9.cd5 (9.e3 a5 10.b5 0–0 11.cd5 cd5 12.Rc1+=) 9...cd5 10.e3 0–0 11.Be2 Nc6 (11...Be6 12.0–0+=) 12.0–0 Be6 13.Nd4 Nd4 14.Qd4 Ne8 15.e4 de4 16.Qe4 Nd6 17.Qf3 Bf6 18.Rfd1 Qe7 19.Qf4 Rfd8 20.Nd5 Bd5 21.Bf6 Qf6 22.Qf6 gf6 23.Rd5 Ne4 24.Rd8 Rd8 25.f3 Rd2 26.Bc4 Nd6 27.Bb3 Rb2 28.Bd5 b6 (28...Rd2 29.Ba2=) 29.h3 Nb5 30.Bc6 (30.Bc4!? Nd6 31.Rc1+=) 30...Nd4= 31.Bd7 Ne2 32.Kf2 Nf4 33.Ke3 (33.Kg3!? Ng2 34.Rg1=) 33...Ng2+= 34.Ke4 Re2 35.Kf5 ½–½. Merten,Rainer – Gross,Wilhelm, 1987.

6.de4 Ne4 7.e3 Be6 8.cd5 Qd5 9.Qd5 Bd5 10.Nh3 Nd7 11.f3 Nef6 12.e4 Be6 13.Nf4 Bd6 14.Ne6 fe6 15.Bc4 Ke7 16.Ke2 Be5 17.Nc3 g5 18.g3 Rad8 19.Bd3 Nh5 20.Rhd1 Rhf8 21.Kf2 Rf7 22.Kg2 Rdf8 23.Rf1 c5 24.Be2 cb4 25.ab4 a6 26.b5 Rc8 27.ba6 ba6 28.Rfc1 Rb8 29.Ra2 a5 30.f4 gf4 (better is 30...Bc3!? 31.Bc3 Nhf6+=) 31.Bh5+– Rg7 32.Ba3 Kf6 33.Ne2 fg3 (better is 33...Kg5 34.gf4 Bf4 35.Nf4 Kf4 36.Kf2 e5+–) 34.hg3 Rg5 35.Bf3 (better is 35.g4 Kg7 36.Rd1 Nf6+–) 35...Rbg8 36.Bb2 Bb2 37.Rb2 Ne5 38.Rb6 a4 39.Ra6 Nd3 40.Rcc6 Nc5 41.Ra7 h6 42.Kf2 (42.Rh7 R8g7 43.Rh6 R7g6+–) 42...Rb8 43.Rcc7 Rb1?? (better is 43...Nd3 44.Kg2 Ne1 45.Kf1 Nf3 46.Rf7 Ke5 47.Rf3 Ke4+–) 44.e5! Re5 (44...Ke5 45.Rc5 Double attack (45.Rc5 Decoy; 45.Rc5 Interception); 44...Re5 45.Rf7 Mate attack) 45.Rf7 (45.Rf7 Kg5 46.Rg7 Kf5 47.Raf7#) 1–0. Humeau,Cyril (2255) – Leibenguth,Jean (1720), Ajaccio FRA, 1st Open, 2012.

4.a3 Nc6

5.d3 ed3 6.Qd3 Bd6 7.Nf3 0–0 8.g3 b6 9.Bg2 Bb7 10.0–0 Rb8 11.b5 Na5 12.Ng5 Bg2?? (better is 12...g6+/–) 13.Bf6+– (13.Bf6 g6 14.Bd8 (14.Kg2? Qf6 15.Nh7 Kh7–+) 14...Bf1 15.Bf6 Be2 16.Qe2+–; 13.Kg2?! Re8 14.Bf6 Qf6 15.Qh7 Kf8=) 1–0. b4_player – bambi, casual, 2013.

5.d3 ed3 6.Qd3 Be7 7.Nf3 (7.Nc3 0–0 8.Nf3 d6 9.Rd1 Be6 10.Nd5 Ng4 11.h3 Nge5 12.Ne5; 7.b5 Na5 8.Nf3 0–0 9.Nbd2 Re8 10.e3 d5 11.Rd1 Bg4 12.Be2; 7.Nd2 0–0 8.Ngf3 h6 9.g3 a6 10.Bg2 d5 11.Rd1 dc4 12.Qc3) 7...0–0 8.Nc3 a6 (8...d6 9.Rd1 Re8 10.g3 g6 11.Nd5 Nd5 12.cd5) 9.g3 b5 (9...d6!?= 10.Bg2 Ne5 11.Ne5 de5 12.Qc2) 10.cb5+/– ab5 11.Bg2 Ba6 12.0–0 (worse is 12.Nb5 Rb8 13.a4 Nb4+=; 12.Rd1+=) 12...Na7? (better is 12...Re8!?+=) 13.Ng5+– c6 14.Nd5! cd5 (14...cd5 15.Bf6 Decoy; 14...Nd5 15.Qh7) 15.Bf6 g6 16.Be7 Qe7 17.Qd5 Nc6 18.Ne4 Bb7 (18...Ra7 19.Rfd1+–) 19.Rfd1 (19.Qb5 Rfb8+–) 19...Na5 20.Qd7 Qd7 21.Nf6 Kg7 22.Nd7 (22.Rd7?! Bg2 23.Kg2 Kf6 24.ba5 Ra5+/–) 22...Bg2 23.Kg2 Nb3 (23...Rfe8 24.ba5 Re2 25.Kf3+–) 24.Rab1 (24.Nf8?! Na1 25.Ng6 Nc2+–) 24...Rfd8 (24...Rfe8 25.Rb3 Re2 26.Rd5+–) 25.Rb3 Ra7 26.Rbd3 h5 27.Ne5 Re8 28.f4 f6 29.Rd7 Kh6 (29...Re7 30.Ra7 Ra7 31.Rd7 Rd7 32.Nd7 Kf7+–) 30.Nf7 Kh7 31.Ra7 Kg8 32.Nh6 Kh8 33.Rdd7 Re2 34.Kf3 Rh2 35.Rh7 1–0. usingprogram – trank8, internet, 2011.

5.g3 d5 6.cd5 Nd5 7.Bg2 Bf5 8.Qb3 Nb6 9.e3 Be6 10.Qc2 f5 11.f4 Nc4–/+ 12.Bc3 Qd5 13.Ne2 Bf7 14.Nd4 a5=+ 15.Nb5?? Qb5–+ 16.d3 Ne3 17.Qe2 Ng2 18.Kf1 Qd3 19.Qd3 ed3 20.b5 Na7 21.b6 cb6 22.Bd4 Bd5 23.Rg1 Bc5 24.Bg7 Rg8 25.Bc3 Ne3 26.Ke1 Nc2 27.Kf1 Na1 28.Ba1 Bg1 29.Kg1 Rc8 30.Bc3 Nb5 31.Bd2 Ba2 32.a4 Rc2 33.ab5 Bb1 34.Be3 d2 35.Bd2 Rd2 36.h3 Rg3 37.Kf1 Rh3 38.Ke1 Rc2 39.Kd1 Rh1 0–1. undergearmalaysia – daver (2215), net–chess.com, 2003.

4.a3 d5

5.cd5 Qd5 6.Nc3 Qd8 7.e3 Nc6 (7...Bf5 8.Nge2=) 8.b5= Ne5 (better is 8...Ne7!?=) 9.Ne4+/– Bd6 (9...Ne4 10.Be5 f6 11.Bd4+/–) 10.Nd6 cd6 11.f4 (11.Rc1 Bf5+/–) 11...Neg4 (11...Bg4 12.Qc2 Ng6 13.Ne2+/–) 12.Bd3 0–0 13.Nf3 Nd5 14.0–0 b6? (better is 14...Ngf6+–) 15.Be4 Ngf6 (15...Nc7 16.Ba8 Na8+–) 16.Bf6 (16.Bf6 Qf6 17.Bd5+–) 1–0. Janek – Asen, internet free game, 2017.

5.cd5 Qd5 6.Nc3 Qd8 7.f3 ef3 8.Nf3 Be7 9.e3 0–0 (9...a5 10.b5=) 10.Bc4 Bg4 11.h3 Bf5 (11...Be6 12.Qb3 Qd6 13.0–0=) 12.Nd4+= Bg6 13.0–0 Ne4? (better is 13...Nbd7=) 14.Ne4+– Be4 15.Qg4 Bg6 16.Nf5 Bf6 17.Nh6!! Kh8 (17...gh6 18.Qf4 Double attack (18.Rf6 Discovered attack; 18.Bf6 Deflection; 18.Qf4 Decoy)) 18.Rf6! gf6 19.Rf1 Nd7 (19...Kg7 20.Rf6 Qf6 21.Nf5 Kh8 22.Bf6 Kg8 23.Ne7) 20.Qd7!! (20.Qd7 Kg7 21.Ng4+–) 1–0. usingprogram (2010) – sodrog, kurnik, 2013.

5.cd5 Qd5 6.Nc3 Qg5 7.e3 (7.Qc2 Bf5=) 7...a6 (7...Bg4 8.Qc2 Qg6 9.Nb5+/–) 8.Qc2 Qg6 (8...Bf5 9.f3+=) 9.Rc1 (9.f3 Bf5 10.fe4 Ne4+/–) 9...Nc6 10.Nge2 Bd6 11.g3 (11.Nf4 Bf4 12.ef4 Nd4 13.Qa4 Bd7+=) 11...Ne5 12.Nd4 Nd3 13.Bd3 ed3 14.Qa4 Bd7 15.Qd1 0–0 16.Qf3 c6 17.Na4 (17.e4!? Rfe8 18.0–0–/+) 17...Bg4–+ 18.Qg2 Be5 (18...a5 19.b5 cb5+=) 19.Nc6= Qh5?? (19...Bd6 20.Ne5 Be5 21.Be5 Qh5 22.Bf6 Bh3–/+) 20.Ne5+– (20.Be5 Bf3 21.Ne7 Kh8+=) 20...Bh3 (20...Bd7 21.g4! (worse is 21.Nd3 Ba4 22.Bf6 Bc6 23.Rc6 bc6+–) 21...Qh4 22.Nc5+–) 21.Qf3 Qf3 22.Nf3 Bg2 23.Rg1 Bf3 24.Nc5 Be2 (better is 24...Ng4+–) 25.Bf6 gf6 26.Nd7 (better is 26.Nb7!? Rfc8 27.Nc5 Rab8+–) 26...Rfc8 The mate threat is Rxc1 27.Rc3 (27.Rc5 Kg7+–) 27...Rd8? (27...Rc3!? 28.dc3 Rd8 29.Nf6 Kg7+/–) 28.Nf6 (28.Rc7 Rac8 29.Rc5 Kg7+/–) 28...Kg7 29.Ne4 f5 (29...Rac8 30.h3+–) 30.Rc7 (30.Nc5 Rdc8 31.Nb7 Rc3 32.dc3 Kf7+–) 30...Kg6 31.Nc5 a5?! (31...Bf3 32.Nb7 Ra7 33.Rc6 (33.Nd8 Rc7 34.Nc6 Rc6 35.b5 Rc1) 33...Bc6 34.Nd8+–) 32.f4 (32.Nb7 Rdc8 33.Rc8 Rc8 34.Nc5 ab4 35.ab4+–) 32...ab4 33.ab4 Bf3 (33...b5 34.Rc6 Kh5 35.Rc7+–) 34.Kf2 Bc6 35.g4 Ra2 36.gf5 Kf6 37.Rgg7?? (better is 37.Rd1 Kf5 38.Rf7 Kg6 39.Nb7+–) 37...Rd2+= 38.Ke1 Threatening mate: Rgf7 38...Re2 39.Kd1 Bd5?? (39...Re1 40.Kd2 Re2 41.Kc3 Rc2 42.Kb3 Bd5 43.Ka4+=) 40.Nd3 (better is 40.Ne4! Kf5 41.Ng3 Ke6 42.Ne2+–) 40...Re3 (40...Rh2 41.Ke1+/–) 41.Kd2+– Rh3 (41...Rde8 42.Rh7 Re2 43.Kc3+–) 42.Rh7 Rh7 (42...Rh8 43.Rh8 (43.Rb7? Rh2 44.Rh2 Rh2 45.Ke3 Bb7–+) 43...Rh8 44.Ke3+–) 43.Rh7 Be4 44.Rh3 Kf5 45.Kc3 (45.Rh5 Kf6 46.Rh3 Kf5+/–) 45...Rc8 (45...Rd3 46.Rd3 Bd3 47.Kd3 Kf4 48.Kc4+–) 46.Kb3 (46.Nc5 b6+/–) 46...Rd8 (better is 46...Rg8!?+/–) 47.Rh5+– Kg4 (47...Kf6 48.Nc5 Rd4 49.Kc3+– (49.Ne4?! Re4 50.f5 b5+–)) 48.Rg5 Kf3 49.Rg3 Ke2 50.Nc5 Bc6 (50...Bd5 51.Kc3 b6+–) 51.Ne6?? (better is 51.f5+–) 51...Rd6?? (better is 51...Bd5 52.Kc3 Be6+=) 52.f5 (52.f5 Bd5 53.Kc3 Be6 54.fe6 Re6 55.h4+/–; 52.Nc7 Rd7 53.b5 Rc7 54.bc6 bc6+–) 1–0. Wall,Bill – Levitin,Sergei, Menlo Park CA, 1989.

5.cd5 Qd5 6.Bf6+= gf6 7.Nc3 Qe5 8.d4 Qf5 9.g3 Bd7 10.Bg2+– e3 11.fe3 Nc6 12.Bh3 Qg5 13.Nf3 Qe3? 14.Nd5 Qh6 15.Bd7 Kd7 16.Qc2 Bd6 17.Qf5 Kd8 18.Nf6 Ne7?? 19.Qd7# 1–0. coby – izzak, internet, 2009.

5.e3 (--> 3.e3 d5 4.a3 Nf6 5.c4).

5.cd5 Nd5

6.Qc2 Qe7 7.Nc3 Nc3 8.Bc3=.

6.Nc3 Nc3 7.dc3 Bd6=+.

6.Nc3 Nc3!? 7.dc3 Qh4=.

6.Nc3 Be6 7.Ne4+= Nd7 8.Nf3 Bf5 9.Nc3 Bg6?? (better is 9...Nc3 10.Bc3 Nf6+/–) 10.Nd5+– c6 11.Nc3 b5 12.e3 Bh5 (12...a5 13.ba5 Ra5 14.d4+–) 13.d4 Nf6 14.Be2 (14.d5 Qc7+–) 14...Nd5 15.Nd5 cd5 (15...Qd5 16.Rc1 a5 17.Bc3+–) 16.0–0 (16.Bb5 Ke7+–) 16...Bd6 (16...Rb8 17.Ne5 Be2 18.Qe2+–) 17.Rc1 (17.Bb5 Kf8 18.Be2 Kg8+–) 17...f6 (17...0–0 18.Ne5 Be2 19.Qe2+–) 18.Nh4 (better is 18.Bb5 Kf8 19.Bc6+–) 18...g5 (18...Be2 19.Qe2 Qd7+–) 19.Bh5 Kd7 (19...Kf8 20.Nf5 a5 21.Rc6+–) 20.Qg4 Ke7 21.Nf5 Kf8 22.Nd6 (better is 22.Rc6 Bh2 23.Kh2 h6+–) 22...Qd6 23.Qf5 Kg7 24.Bf3 h5 (24...Rad8 25.Bd5! Qe7 26.Bc6+–) 25.Bd5 h4 26.Rc6 Qe7 27.Rfc1 g4 28.Rc7 1–0. Fournier,Frederic (1870) – AILUSO (1665), Active, 2005.

6.Nc3 f5 7.d4 e3 8.Nd5 ef2 9.Kf2 Qd5 10.Nf3 Be7 11.g3 0–0 12.Bg2 c6 13.Rf1 f4 14.Kg1 fg3 15.hg3 Bg4 16.Ne5+/– Qe6 17.Rf8 Bf8 18.Qd2 Nd7 19.Ng4 Qg4= 20.Qe3 Nf6 21.Rf1 Re8 22.Qf3 Re2 23.Rf2 Qf3 24.Bf3 Rf2 25.Kf2 Kf7 26.Ke3 Ke6 27.g4 h6 28.Bc1 Bd6 29.Kd3 Nd5 30.Bg2 b6 31.Bd2 c5 32.bc5= bc5 33.a4 Nb6 34.a5=+ Nd5 35.Kc4+= Nf4 36.Bf4 Bf4 37.dc5 Kd7 38.Kd5 Bd2 39.a6 Kc7 40.Be4 ½–½. inspector (2330) – kode (2345), net–chess.com, 2008.

6.Nc3 Bf5 7.e3 (7.d3 ed3 8.ed3 Nc6=+) 7...Nc3 (7...Nf6 8.Nge2=) 8.dc3= Qf6 9.Qc2 Nd7 10.c4 Ne5 11.0–0–0 (11.Rd1 Qe6 12.Be5 Qe5 13.Ne2=) 11...c6 (11...Qe6!?=+) 12.Qc3 (12.g4 Bg4 13.f3 Bf5–/+ (13...Bf3?! 14.Nf3 ef3 15.Qd2=)) 12...Nd7 (12...Ng4 13.Qf6 gf6=) 13.Qd2 (13.Qf6!? Nf6 14.Bf6 gf6 15.Ne2=) 13...Qe6=+ 14.Kb1 (14.f3 0–0–0=+) 14...a5 15.Ne2 Qc4 (15...ab4 16.Nd4 Qg6 17.Nf5 Qf5 18.ab4=+) 16.Nd4 Qd5 17.Qc2 (17.Bc4! Qc4 18.Nf5=+) 17...Be6–/+ (17...ab4 18.Nb5 Qd1 19.Qd1 cb5 20.Bb5 ba3 21.Qd5+/–) 18.Ne6 Qe6 19.Bc4 Qg6 20.Qd2 Rd8 ½–½. Grott,Peter – Buecken,Guenter, DESC, 2000.

6.e3 Nc6 7.b5 Nce7 8.Ne2 (8.d3 ed3 9.Bd3 Bf5 10.Bf5 Nf5+=) 8...c6 (8...a6 9.ba6 Ra6 10.Qc2=) 9.Ng3+= Bf5 (9...f5!?+=) 10.bc6 bc6 11.Qc2 Qd7 12.Ne4 Rb8 13.Bd3 Ng6 (13...f6!?+/–) 14.Nf6!+– Nf6 (14...Nf6 15.Bf5 Discovered attack; 14...gf6 15.Bf5 Discovered attack) 15.Bf5 Be7?? (better is 15...Qd6+–) 16.Bd7 (16.Bd7 Kd7 17.Bd4+–) 1–0. wiking – Papachibe, internet, 2009.

6.e3 Be6 7.Nc3 Nc3 8.dc3 Nd7 9.c4=+.

6.e3 Be6 7.Nc3 Nc3 8.Bc3 Nd7 9.Ne2 Nf6 10.Nf4 Qd7 11.Ne6 Qe6 12.Qa4 c6 13.b5 Be7 14.bc6 bc6 15.g3 0–0 16.Bg2 Rfe8 17.0–0 Bc5 18.Bf6 gf6 19.d3! f5 (19...ed3 20.Qa6 Double attack (20.Bc6 Pinning; 20.Bc6 Deflection; 20.Qa6 Decoy)) 20.Rac1 Bb6 21.Rc4 ed3 22.Rc6 (worse is 22.Qc6 Rac8 23.Qe6 fe6+=; 22.Bc6?! Rac8+=) 22...Qd7 23.Rg6!! (23.Rg6 hg6 24.Qd7+–) 1–0. usingprogram (2005) – karpow37 (1885), kurnik, 2012.

6.e3 Be6 7.Nc3 f5 8.Nd5 Qd5 9.Nh3 (9.d3 Nc6=) 9...Nd7 10.Nf4 Qb3 (10...Qd6 11.Qh5 Kd8 12.d3+/–) 11.Ne6+= Qe6 12.Rc1 c6 13.Bc4 Qg6 14.Kf1 (14.0–0 Nb6+=) 14...Bd6 15.d4 Nf6 16.d5 (better is 16.Kg1=) 16...Rd8 (16...Nd5 17.Bd5 cd5 18.Qd5+=) 17.dc6= bc6 (17...Be5 18.Qa4 b5 19.Bb5 Bb2 20.c7 Ke7 21.cd8R Rd8 22.Qa7 Kf8 23.Qc5 Kg8+–) 18.Qa4+/– f4 (18...Nd7 19.Qc6 Ke7 20.Qa4+/–) 19.ef4 (19.Qc6 Ke7+/–) 19...Bf4 20.Qc6 Ke7 (20...Kf8 21.Re1 Bd2 22.Qc5 Ke8 23.Bf6 gf6 24.Qc6 Kf8+–) 21.Re1+– e3 (21...Bd6 22.Bf6 Kf6 23.Qe4 Qe4 24.Re4+/–) 22.Qc5 Ke8 23.Bd4 (23.fe3 Bb8+–) 23...Ne4 (better is 23...Nd7 24.Qa7 Qc2+–) 24.Bb5 Kf7 25.Qa7 Kf8 26.Be3 Qf5 27.Bc5 Bd6 28.Bd6 Rd6 29.Qa8 Kf7 30.Bc4 (30.Bc4 Kg6 31.Qe4+–) 1–0. Busch,K – Ranby,Hans, corr SOK–90–59, 1990.

6.e3 Be6 7.d3 Nf6=.

6.e3 Bf5 7.Ne2 a5 8.b5 Nd7 9.d3 ed3 10.Nd4 Bg6 11.Bd3 Nc5 12.Bg6 hg6 13.0–0 Qd7 14.h3 Bd6 15.Qf3 Na4 16.Ra2 Rh5 17.Ba1 Kf8 18.Nd2 Nac3 19.Rc2 Nb5 20.Nb5 Qb5 21.Nc4 Re8 (21...Be7 22.e4 Nf6 23.Ne3=) 22.Rfc1 Ne7 23.Rb2 Qc6 24.Rb7 Qf3 25.gf3 Rh3 26.Be5 Be5 27.Ne5 Nd5 28.f4 f6 29.Nc6 (29.Ng6 Kf7 30.f5 Rh5+/–) 29...Rh5 30.Ra7 Rc8 (30...g5!? 31.f5 g4+=) 31.Ra5+/– Ke8 32.Ra7 Kd7 33.Kg2 Rhh8 34.Ra4 Rh5 35.Rd4 Ke6 36.a4 Ra8 37.Kg3 Rah8 38.a5 Rh3 39.Kg2 Rh2 40.Kf3 R2h3 41.Ke2 R3h5 42.a6 Ra8 43.a7 Rhh8 44.Kf3 Rh3 (44...Nb6 45.Rd2 Kf7 46.Ra2+–) 45.Ke4 f5 46.Kd3 Rhh8 47.Kc4 Ne7 48.Kb4 Nd5 49.Kb5 Nf6 50.Rcd1 1–0. Taulien,Hans_Juergen (2350) – Friedrich,Fritz (2200), RST4–6D–1 remoteschach.de, 2004.

6.e3 f6 7.Bc4 (7.d3 Bf5 (7...ed3 8.Bd3 Be6 9.Nf3 c5 10.bc5 Bc5 11.Qc2+=) 8.de4 (8.Nd2 ed3 9.e4 Nb6 10.ef5 Qe7 11.Ne2=) 8...Be4 9.Qg4 Bg6 10.Nc3 Nc3 11.Bc3=) 7...Be7?? (better is 7...Nb6 8.Bb3 Bf5= 9.Ne2 Nc6 10.Ng3 Bg6 11.0–0=; 7...Bf5 8.Qb3 (8.Qh5 g6 9.Qh4 Bg7 10.Bd5 g5 11.Qg3+=) 8...c6 9.Nc3 Nc7 10.Bf7 Ke7 11.Nge2+=) 8.Qh5+– g6 9.Qd5 1–0. Wall,Bill – KingsTale, internet, 2003.

6.e3 Nf6 7.Bc4=.

6.e3 a5

7.Qa4 A) 7...c6 8.b5 f5 9.d3 ed3 10.Nf3 Nc7 11.Nc3=; B) 7...Bd7 8.b5 Bf5 9.Nc3 Nc3 10.dc3 Nd7 11.Qd4=+.

7.ba5 Ra5 8.d3 Nf6 9.Nc3 Bg4 10.Qc2 ed3 11.Bd3 =.

7.d3 ed3 8.ba5 Bf5 9.e4 Qe7 10.Nd2 Ra5 11.Qf3 =.

7.d3 ed3 8.b5 =.

7.d3 Nf6 8.b5 Bg4 9.Be2 Be2 10.Ne2 ed3 11.Nf4 =.

4.a3 d6

5.Nc3 c5 6.Qc2 Nc6 (better is 6...Bf5!?= 7.g4 Bg4 (7...Ng4 8.Ne4 cb4 9.Nd6 Bd6 10.Qf5 Qd7 11.Qe4 Kd8) 8.Ne4 Nc6 9.Nf6 gf6 10.Bg2 Qe7 11.h3 Be6) 7.Ne4+/– Nd4 (7...Be7!? 8.b5 (8.Nf3 cb4 9.ab4 Nb4 10.Qa4 Nc6 11.Nd4 Bd7) 8...Nd4 9.Bd4 cd4+/– 10.Nf3 d5 11.Ng3 Qb6; 7...Ne4 8.Qe4 Qe7 9.Qc2 cb4 10.Nf3 Bg4 11.h3 Bd7) 8.Bd4 cd4 9.Nf3 Bf5 (9...Be7!?+/– 10.Nd4 d5 11.Nc5 0–0; 9...Qe7 10.Nf6 Qf6 11.Qe4 Be7) 10.Nd6!+– Bd6 (10...Qd6 11.Qf5 Discovered attack 11...Rd8; 10...Bd6 11.Qf5 Discovered attack 11...0–0) 11.Qf5 0–0 (11...a5 12.Qb5 Qd7 13.ba5 Qb5 14.cb5+–) 12.c5 Bc7 13.Rc1 (13.e3 de3 14.de3 g6+–) 13...Re8 14.Qd3 Be5 (14...Re4 15.Rc4+–) 15.g3 (15.Rc4 b5 16.cb6 ab6 17.Ne5 Re5 18.Rd4 Qc7+–) 15...Rc8 (15...a5 16.Bg2 Ra7 17.b5+–) 16.Bh3 (16.Bg2 Rc7+–) 16...Rc7 17.0–0 Qd5 18.Bg2 Ne4? (18...Qe6+–) 19.Ng5! (19.Ne5?! Qe5 20.f4 Qe6+–) 19...f5 20.Ne4 (20.Be4?! fe4 21.Qe4 Qe4 22.Ne4 g6+–) 20...fe4 21.Be4 Qd8 (21...Qe6 22.Bh7 Kh8 23.Bf5+–) 22.Bh7 Kh8 (22...Kf8 23.Bg6 Re6 24.Qf5 Rf6 25.Qg5+–) 23.Bg6 Re6 (23...Ree7 24.Qf5 Kg8 25.Qh3+–) 24.Qf5 (24.Qf5 Qc8 25.f4+–) 1–0. Trokenheim,Marek (2175) – Luebbe,Hermann (1925), remoteschach.de, 2010.

5.Nc3 Nc6 6.d3 ed3 7.ed3 Ng4 (better is 7...Be7!?=) 8.Be2+= Qe7?? (better is 8...h5+=) 9.Nd5+– Qg5 (9...Qd8 10.Bg4 Bg4 11.Qg4+–) 10.Nc7 Kd8 11.Nf3 Qg6 (11...Qf4 12.Na8 Bd7 13.b5+–) 12.Na8 1–0. pierre – nairobi, internet, 2009.

5.e3 Be7 6.Nc3 Bf5 7.Nge2 c6 8.Qc2 Nbd7 9.Ng3 The pressure on e4 grows 9...Bg6 10.h4 (worse is 10.Nge4 Ne4 11.Ne4 d5–/+) 10...h6 11.h5 (worse is 11.Nge4 Ne4 12.Ne4 d5–/+) 11...Bh7 12.Be2 d5 13.Qb3 Ne5 (13...dc4 14.Bc4 0–0 15.Qc2+=) 14.Nce4 Ne4 15.Ne4 Be4 (15...Nc4 16.Bc4 Be4= (worse is 16...dc4 17.Qc4 Rg8 18.d3+/–)) 16.Be5+/– Bf6 17.Bf6 (17.Bf6 Qf6 18.0–0+/–) 1–0. combijack (1745) – raschilling (1655), gameknot.com, 2009.

5.e3 Be7 6.d3 0–0 7.de4 Ne4 8.Nd2 (8.Bd3 Nf6+=) 8...f5 (8...Nd2 9.Qd2 a5 10.Bd3=) 9.Ngf3 (9.Ne4 fe4 10.Qd5 Kh8 11.Qe4 Nc6+=) 9...Be6 (9...Bf6!? 10.Rb1 Nc3 11.Bc3 Bc3=) 10.Nd4 Bf7 (10...Bd7 11.Bd3 Nd2 12.Qd2+=) 11.Nf5+/– Qd7 (11...Nd2 12.Bg7 (12.Kd2?! Bf6 13.Bf6 Qf6=; 12.Ne7?! Qe7 13.Qd2 Nc6+/–) 12...Bf6 13.Bf8 Nf1 14.Be7 Be7 15.Nh6 Kf8 16.Nf7 Kf7 17.Qd5 Kg7 18.Qb7 Ne3 19.fe3+/–) 12.Ne7 (12.Nh6 gh6 13.Ne4 Nc6+–) 12...Qe7+/– 13.Be2 Qh4?? (13...Nc6 14.0–0+/–) 14.0–0 (14.Ne4 Qe4 15.Bf3 Qg6 16.Bb7 Nd7 17.Ba8 Ra8+–) 14...Be6?? (14...Nd2 15.Qd2 Nc6 16.Qc3+/–) 15.Ne4 (better is 15.g3 Ng3 16.fg3 Rf1 17.Qf1+– (17.Kf1?! Qh2 18.Bf3 Nc6+–)) 15...Qe4 16.Bd3 (16.Bf3 Rf3 17.gf3 Qh4+–) 16...Qg4 (16...Qh4 17.f4+/–) 17.Qc2 (17.Qg4 Bg4 18.Be4 Nc6+–) 17...Bf5 18.e4 Be6 19.Be2 (19.e5 Bf5+–) 19...Qg6 20.f4 Bh3 21.Rf2 (better is 21.Bd3!? Nc6 22.Rf3+–) 21...Rf4+= 22.g3 (22.Raf1 Rf2 23.Rf2+= (worse is 23.Kf2 Qg2 24.Ke1 Be6+=)) 22...Rf2= (22...Re4?? 23.Bd3 Bf5 24.Rf5+–; 22...Qe4 23.Qc3 Rf7 24.Bh5+–) 23.Kf2 Nc6 24.Bc1?? (better is 24.c5=) 24...Rf8 (better is 24...Qf6 25.Ke1 Qa1 26.c5–+) 25.Bf4 (25.Ke1 Nd4 26.Qd3 Ne2 27.Qe2 Rf1 28.Kd2 Qf6–+) 25...Nd4 (better is 25...Qf6 26.Qd1 g5–+) 26.Qd3 c5 (26...Qf6 27.Bf1 Ne6 28.Bh3 Nf4 29.gf4 Qa1 30.Be6 Kh8 31.f5–+) 27.Ke3 (better is 27.Re1!?+=) 27...Re8 (27...Ne2?! 28.Ke2 Re8 29.Kf2+=) 28.Bf3 Nf3 (better is 28...Qf7!?–+) 29.Kf3+= Qg4 (29...Re4 30.Qd5 Kh8 31.Qd6 Qe8 32.Qc5 Re2–/+) 30.Kf2=. GuestHSHW – GuestQPBY, freechess.org, 2017.

4.a3 Be7

5.Qc2 0–0 6.Nc3 d5 (6...Re8 7.e3 a5 8.ba5 Bd6 9.d3 Be5=) 7.cd5 Nd5 (7...Bf5 8.Nf3 c6 9.dc6 Nc6=) 8.Ne4 Nf6 (8...a5 9.b5 Bf5+=) 9.0–0–0 (9.Bf6 Bf6 10.Rc1 Bd4+/–; 9.e3 Ne4+/–) 9...Be6 (9...Re8!?=; 9...Ne4=) 10.Ng5+= Bg4?? (better is 10...Qd7+=) 11.Bf6+– g6 12.Be7 Qe7 13.h3 Bf5 14.e4 Bd7 15.Qc5 Qf6 (15...Qe8 16.Qc7 a5 17.Qb7 Bc6+–) 16.Qf8! (16.Qf8 Kf8 17.Nh7 Kg7 18.Nf6 Kf6 19.d4+–) 1–0. themonkey – NN, GameColony.com, 2002.

5.Qc2 d5 6.Nc3 c6+= 7.cd5 cd5 8.f3 (8.d3 0–0+=) 8...0–0+= 9.fe4 de4 10.Ne4 Ne4 11.Qe4 Bf6 (11...Nc6 12.e3 Bh4 13.g3+=) 12.Bf6+= Qf6 13.Rc1 Nc6 14.Nf3 Bf5 15.Qf4 Rae8 (15...Qb2!? 16.Rc3 Be6=) 16.g4+/– Qb2? (better is 16...Be4 17.Qf6 gf6+/–) 17.Rc6+– bc6 18.gf5 (18.Qf5?! Qa3 19.Qf4 Rb8+/–) 18...Qa3 (18...f6 19.Kf2 Qa3 20.e3+–) 19.Rg1 Qa1 (19...Qb2 20.f6 g6 21.Kf2+–) 20.Kf2 Qf6 21.e4 Qb2 (21...Kh8+–) 22.f6 Kh8 (22...g6 23.e5 Re6+–) 23.Rg7 Re4 (23...Qf6 24.Qf6 Re6 25.Qa1 Rg6 26.Rg6 f6 27.Rf6 Kg7 28.Rd6 Kf7 29.Bc4 Ke8 30.Qe5) 24.Qe4 Qf6 (24...Qb1 25.Qb1 Re8 26.Qh7) 25.Qh7 1–0. pierre – munkhtr, internet, 2012.

5.Qc2 d5 6.cd5 a5 7.b5 Nbd7 8.f3 Nc5 9.fe4 Nce4 10.d3 Nd6 11.e4 Nb5 12.Nf3 c6 13.d4 0–0 14.Bb5 cb5 15.0–0 Ng4 16.Qe2 f5 17.Ne5 Nf6 18.Nc3 fe4 19.Qb5 Bd6 20.a4 b6 21.Qb3 Ba6 22.Rf5 g6 23.Rf4 Exerts pressure on the isolated pawn 23...Rc8 24.Nb5 Bb5 25.ab5 Kg7 26.Raf1 Bb4 27.Qh3 Rc7 28.Qg3 Qd6 (worse is 28...Qd5 29.Rf6 Rf6 30.Rf6+–) 29.R4f2 Nh5 30.Qe3 Rf2 31.Qf2 Qd5 32.g4 e3 33.Qe3 Nf6 34.g5 Ne4 35.Rc1 Bd6 36.Rc7 Bc7 37.Qc1 Be5 38.de5 Nc5 39.Qf4 Qd1 40.Kg2 Qc2 41.Kg1 Kg8 42.Ba3 Qb1 43.Qf1 Qf1 44.Kf1 Ne6 45.Ke2 Nd4 46.Kd3 Nb5 47.Be7 a4 48.Kc4 Nc7 49.Ba3 Kf7 50.Bb2 Ne6 51.Bc1 Nc5 52.Kd5 Nd3 53.Be3 b5 54.e6 Ke7 55.Ke4 Ne1 56.Bd2 Nc2 57.Kd3 Na1 58.Bc3 Nb3 59.Ke4 Ke6 60.Bb4 Kd7 61.Kd3 Kc6 62.Bf8 Nc5 63.Kc3 Ne6 (better is 63...Ne4!? 64.Kd3 Ng5 65.Ke3–+) 64.Be7 Nf4 65.Bf8 Nd5 66.Kd4 b4 67.Kc4 b3 68.Ba3 Nb6 69.Kb4 Kd5 0–1. Hoch,Hubertus (2325) – Kuna,Heiko (2375), RSLE–2011, 2011.

5.Qc2 d5 6.cd5 a5 7.Nc3 ab4 8.ab4 Ra1 9.Ba1 Na6 10.Ne4 Nb4 11.Nf6 gf6=.

5.Nc3 0–0 6.e3 (6.Qb1 Re8=) 6...d6 (6...a5!?=) 7.Qc2+= Bf5 8.Nge2 c6 (8...a5 9.b5+=) 9.Ng3+/– Now all is on e4 9...Bg6 10.h4 (10.Nge4 d5 11.cd5 Ne4 12.Ne4 cd5+=) 10...h6 11.h5 Bh7 12.Nce4 Ne4 13.Ne4 d5 14.cd5 (14.Qc3 d4 15.Qd3 Re8 16.Bd4 Bh4 17.Bg7 Kg7 18.Qd8 Bd8+=) 14...cd5 15.Qc3 The mate threat is Qxg7 15...d4 16.Qc2 (16.Qd3 Re8+=) 16...Nc6 17.Bd3 de3 (17...Rc8 18.Qb1+=) 18.de3 (18.fe3 Rc8 19.Nc5 Bd3 20.Qd3 Bc5 21.Qd8 Nd8+=) 18...Bb4 19.Ke2 (19.ab4 Nb4 A double attack) 19...Be7= 20.Rhd1 Kh8 21.Ng3 Rc8?? (better is 21...Bd3 22.Qd3 Qa5=) 22.Bh7+– Nd4 23.Bd4 (23.ed4?! Rc2 24.Bc2 Qe8+–; 23.Rd4?! Rc2 24.Bc2 Qb6+–) 23...Rc2 24.Bc2 Bf6 (24...Qc8 25.Rd2 f5 26.Ba7+–) 25.Rab1 Qe7 (25...Bd4 26.Be4+– (26.ed4?! Qe7 27.Kd2 Rd8+–)) 26.Bf6 Qf6 27.Rd7 Qc6 28.Bf5 Rb8 29.Rbd1 g6 30.R1d6 Qc4 31.Bd3 Qa2 32.Kf3 g5 (32...Rf8+–) 33.Rh6 Kg8 34.Bh7 Kf8 35.Bg6! (35.Bg6 Kg8 36.Bf7 Qf7 37.Rf7 Kf7 38.Kg4+–) 1–0. Pleschke,Helmut – Kember,Thomas, IECG, 2001.

5.Nc3 a5 6.b5=.

5.Nc3 c6 6.d3 a5 7.b5 d5 8.bc6 bc6 9.cd5 cd5 10.de4 de4 11.Qd8 Bd8 12.e3=.

5.Nc3 c6 6.d3= ed3 7.Qd3 (7.e3 a5 (7...0–0 8.Bd3 a5 9.b5 d6 10.Nf3 Nbd7 11.0–0 Nc5) 8.b5 0–0= (8...d6 9.Bd3 Nbd7 10.Nf3 Nc5 11.Nd4 Bd7) 9.Nf3 d6 10.Bd3 Nbd7 11.0–0 Nc5; 7.Nf3 a5 (7...0–0 8.e3 a5 9.b5 d6 10.Bd3 Nbd7 11.0–0 Nc5) 8.b5 0–0 9.e3 d6 10.Bd3 Nbd7 11.0–0 Nc5) 7...0–0= (7...a5 8.b5 0–0 9.Rd1 d6 10.Nf3 Nbd7 11.Na4 Qc7) 8.Rd1 (8.Nf3 d6= (8...a5 9.b5 d6 10.Ne4 Bf5 11.Nfg5 Ne4) 9.e3 a5 10.Ne4 Bf5 11.Nfg5 Ne4) 8...b6 (better is 8...d6!?+= 9.Nf3 Nbd7 10.Qd4 a5 11.Rd2 ab4) 9.Nf3+= Qc7 (9...a5 10.b5+= Bb7 11.Ne5 d6; 9...Re8 10.g3 a5 11.b5 cb5) 10.e4 (10.g3 d6+= 11.Bg2 Nbd7; 10.Ne4 Ne4 11.Qe4 Re8) 10...d6 11.Nd4 Nbd7 (11...a5 12.b5 c5+/–; 11...Bg4+=) 12.Nf5+/– Re8 (12...Ne5 13.Ne7 Qe7 14.Qd6 Qe6+/–) 13.f3 (13.Ne7 Re7 14.Qd6 Qd6 15.Rd6 Ne4 16.Ne4 Re4 17.Kd2 a5+/–) 13...d5 (better is 13...Bf8!? 14.Nd6 Re6 15.Nc8 Rc8+=) 14.Ne7+/– Re7 15.cd5 cd5 (15...Ne5 16.Qd4 cd5 17.Nd5 Nd5 18.Qd5+/–) 16.Nd5+– Nd5 17.Qd5 Bb7 18.Qd4 Nf6 19.Qd6 Qd6 (19...Rc8 20.Bb5+–) 20.Rd6 Ne8 (20...Rc8 21.Bb5+–) 21.Rd2 Rc8 22.Be2 h6 (22...Nc7 23.Kf2+–) 23.Kf2 Rec7 24.Rhd1 a6 (24...Rc2 25.Bd3 Rd2 26.Rd2+–) 25.Bd4 b5 26.Bc5 Nf6 (26...g6 27.h4+–) 27.Rd8 (27.e5 Ne8+–) 27...Kh7 28.e5 Rd8 29.Rd8 Nd5?? (29...Rd7 30.Bd3 g6+–) 30.Bd3 g6 31.g3 (31.Bd6 Rc8 32.Rd7 Bc6 33.Rf7 Kg8 34.Bg6 Rd8+–) 31...Nc3 (31...Bc6 32.e6! fe6+–) 32.Bd6 (better is 32.Bd4 Rc8 33.Rc8 Nd1 34.Ke2 Bc8 35.Be4+–) 32...Rc8 33.Rd7 Bd5 34.Bc5 Be6 35.Ra7 Na4 (35...Nd1 36.Ke1 Nb2+–) 36.Be7?? (36.Bd4!? Rc6+–) 36...Nb2? (better is 36...Rc3 37.Ke2 Ra3+=) 37.Be4+– Nc4 38.Bf6 Na3 39.g4 Nc2 40.h4 Kg8 41.Bb7 (41.Be7 h5 42.gh5 gh5+–) 41...Rb8? (better is 41...Re8!? 42.Ba6 Nb4 43.Bb5 Rb8+–) 42.Be7+– Bc8?? (42...h5 43.Be4 Rc8 44.gh5 gh5+–) 43.Be4 Bf5 (43...Bg4 44.fg4 Nd4+–) 44.gf5 Nd4 45.fg6 fg6 46.Bd5 1–0. Tasic,Zoran (2160) – Pokrajac,Momcilo (1980), 19th Belgrade Trophy, Belgrade SRB, 2006.

5.Nc3 c6 6.d3 e3 7.Nf3 (7.fe3!? 0–0 8.e4+=) 7...ef2+= 8.Kf2 d5 9.h3 Nh5 (9...0–0 10.cd5 cd5 11.e3+=) 10.e4 (10.cd5 cd5 11.e4 Qb6 12.Ke1 de4 13.de4 Qg6=) 10...d4 (10...de4!? 11.de4 Nd7=) 11.Ne2+= c5 12.bc5 (12.g4!? Nf6 13.bc5+/–) 12...Nc6= 13.g3 (13.g4 Nf6 14.e5 Nd7 15.Ned4 Nc5 16.Nc6 bc6+/–) 13...Bc5 (13...0–0 14.g4 (14.Bd4? Nd4 15.Ned4 Bc5–+) 14...Nf6 15.Qe1= (15.Ned4? Bc5 16.Kg2 Nd4–+)) 14.Bg2 (14.e5 f5=) 14...0–0 15.Nf4 (15.Qd2!?=) 15...Nf4–/+ 16.gf4 Be7 (16...f6 17.Qd2–/+) 17.Qg1 White plans e5 (17.Qd2+=) 17...f5 (better is 17...f6!?–/+) 18.e5= g5?? (18...Qb6!? 19.Rb1 Qc5=) 19.fg5?? (better is 19.Ng5 Qa5 20.Bd5 Kh8 21.Ke2+–) 19...Kh8 (19...f4 20.h4+/–) 20.h4 Qb6 (20...f4 21.Qe1 Bc5 22.Bh3 Bh3 23.Rh3+/–) 21.Qb1 (21.Rb1 Bc5+/–) 21...Be6 22.Bc1 Qb1 (22...f4 23.Bh3 Bh3 24.Qb6 ab6 25.Rh3+/–) 23.Rb1 Nd8? (better is 23...b6+–) 24.Ke2 (24.Ke2 Bc5 25.h5+–) 1–0. Beljdy,Alexander – Klimov,Valery (1945), Novosibirsk–April, 2010.

5.d4 d5 6.e3 dc4 7.Bc4 c6 8.Ne2 b5 9.Bb3 0–0 10.Ng3 Bg4 11.Qc2+= a5 12.Nd2 a4 13.Ba2+/– Bd7 14.Nde4 Nd5 15.Bd5 cd5 16.Nc5 Bg4 17.0–0 Na6 18.Rac1 Nc5 19.dc5+– Rc8 20.Bd4 g6 21.f3 Bd7 22.Qb2 Bc6 23.Ne2 f6 24.Nf4 Qd7 25.Qc2 g5 26.Nh5 Rf7 27.Qc3 Qf5 28.e4! Qg6 29.Nf6?? Bf6–/+ 30.e5 Be7 31.Rce1 h6 32.Re2 Rcf8 33.Bf2 h5 34.Be1 g4–+ 35.Re3 gf3 36.Ref3 Rf3 37.Rf3 d4 38.Rg3 Bg5–+ 39.Qd4 h4 40.Rg4 Be3! 41.Qe3 Qg4 42.Qd2 Qf4 43.Bf2?? Qd2 (43...Qd2 44.e6 Qf2 45.Kh1 Qg2#) 0–1. alaamattar (2145) – cruciverbalist (2000), net–chess.com, 2010.

5.e3 a5 6.d4 ab4–/+ 7.Ne2 ba3 8.Ba3 d5?? 9.Be7+– (9.Be7 Ra1 10.Bd8 Kd8 11.cd5 Nd5 12.Qb3+–) 1–0. elcid10 – Darkseid, ChessWorld.net, 2009.

5.e3 d6 6.Nc3 Nbd7 (6...a5!?=) 7.Qc2+= 0–0 8.Ne4 Ne4 9.Qe4 Nf6 10.Qc2 Be6 (10...d5 11.Rc1+/–) 11.Nf3 Qd7 (11...a5 12.Bd3+/–) 12.Bd3 h6 13.0–0 Rad8 14.Nd4 c5 15.Ne6 Qe6?? (better is 15...fe6 16.f4 a6+/–) 16.Bf5+– Qf5 (16...a6 17.Be6 fe6 18.Rab1+–) 17.Qf5 1–0. wiking – razoman, queenalice.com, 2009.

5.g3 c6 6.Bg2 d5 7.Qc2 Bf5 8.Nc3 ½–½. roy1nc6 (1875) – luker67 (1680), gameknot.com, 2012.

5.e3 0–0

6.Nc3 a5 7.b5 d5 (7...c6!?=) 8.cd5+= Nbd7 9.d3 ed3 10.Bd3 Nc5 11.Bb1 Qd6 12.Nf3 Bg4 13.0–0 Rad8 14.e4 Qf4 15.Bc1 Bf3 16.Bf4 (16.Qf3?! Qf3 17.gf3 Nb3+/-; 16.gf3?! Qe5 17.Qc2 Qh5=) 16...Bd1 17.Rd1 (17.Nd1?! Nce4 18.Be4 Ne4=) 17...Nb3 18.Ra2 Rc8 19.f3 (19.e5 Nd7+–) 19...Nd7 20.Rb2 Nbc5 21.Ba2 (21.e5 g5 22.Bg3 h5+–) 21...Bf6 22.Rc2 b6 23.Be3 Rfe8 24.Bc4 Be5 25.Ne2 f5 (25...Bd6 26.Nd4+–) 26.f4 Bd6 27.e5 Bf8 (27...Ne5 28.fe5 Re5+–) 28.d6 Kh8 29.Bc5 bc5 30.e6 (30.e6 Nb6 31.d7+–) 1–0. Fournier,Frederic (1820) – ValeryVas (1795), rated blitz game (2/12), 2002.

6.Nc3 b6 7.d3+= a5 8.b5+=.

6.Nc3 b6 7.d3 Bb7 8.de4 Ne4 (8...a5 9.e5 Ne4 10.Ne4 Be4 11.Qg4+=) 9.Ne4 Be4 10.Qd4 Bf6 11.Qe4 Bb2 12.Bd3 f5 13.Qa8 Bc3 14.Kf1 Ba1 15.Nf3 Nc6 16.Qd8 Nd8 17.Ke2 Bb2 18.Rb1 Bc3 19.Rb3 Ba1 20.c5 g6 (better is 20...Kh8!?+/–) 21.Bc4+– Kg7 22.Rb1 Bb2?? (better is 22...Bf6 23.Rd1 d6 24.cd6 cd6 25.Rd6 Kh6+–) 23.Rb2 1–0. b4_player – opponent, gamecolony.com, 2007.

6.Nc3 b6 7.d3+= ed3 8.Bd3 Bb7 (8...a5 9.b5+=) 9.e4 (9.Nf3 Re8+=) 9...d6 (9...Re8 10.Nge2=) 10.Nge2 (10.Nf3 a5+=) 10...Nbd7 11.Ng3 Re8 12.0–0 Bf8 e4 draws heavy fire (12...Ne5 13.Nf5+=) 13.Rc1 (13.Nd5 a5+/–) 13...Ne5+= 14.Nd5 (14.Be2 Ned7+=) 14...Nfd7 (14...c6 15.Nf6 Qf6 16.Re1+=) 15.Bb1 (15.Be2 c6 16.Nc3 Qc7+=) 15...Rc8 (15...c6 16.Ne3+=) 16.Rc3 (16.f4 Ng6 17.Nf5+/–) 16...Nc4 (better is 16...a5!?+=) 17.Rc4+– Ba6 18.Rc3 (18.Rc6 Bb5 19.Qg4 Ne5 20.Be5 Re5+–) 18...Bf1+/– 19.Qf1 (19.Nf1 c6 20.Nde3 Ne5+/–) 19...c6 20.Ne3 g6 21.Rd3 Qc7 (21...Ne5 22.Rd2+/–) 22.Qc1 (22.Ba2 Ne5+/–) 22...Ne5 23.Rc3 c5 (23...Bh6 24.b5+/–) 24.f4 (24.Nd5 Qd8+–) 24...Nc6 (24...Nd7 25.Nd5 Qd8 26.Bd3+–) 25.Nd5 Qd8 26.Nf5 Re6 (26...b5 27.Rg3 Re6 28.Qc3+–) 27.b5 Nb8 (27...Na5 28.Rh3 a6 29.ba6+–) 28.Rg3 Nd7 29.Qc3 f6 30.Ba2 c4 31.Bc4 Kh8 32.Nd4 (32.Nd4 Re4 33.Nc6 Rc4 34.Qc4+– (34.Nd8?! Rc3 35.Rc3 Rd8+–)) 1–0. Dotlacil – Chmelik,Jiri, CS, 1977.

6.Nc3 b6 7.d3 ed3 8.Bd3 Bb7 9.Nf3 Re8 10.0–0 a5 11.b5+=.

6.Nc3 c6 7.Qb3 d6 8.Rc1 Re8 9.Qc2 Bf8 10.d4 (10.d3 a5=) 10...d5+= 11.cd5 cd5 12.Nb5 Na6 13.Nc3 b6 14.Bb5 Re6 15.Nge2 Bb7 16.Nf4 Re7 17.Qa4 Nc7 18.Bc6 Ne6?? (18...Bc6!? 19.Qc6 Rd7=) 19.Ne6?? (better is 19.Nfd5 Bc6 20.Ne7 (20.Qc6?! Nd5 21.Qd5 Qd5 22.Nd5 Rd7+–) 20...Be7 21.Qc6+–) 19...fe6= 20.Bb7 Rb7 21.0–0 (21.Qc6 Re7+=) 21...a6 22.Ne2 (22.Qc6 Re7=) 22...b5+= 23.Qb3 Bd6 24.Rc6 Rf7 25.h3 Qd7 26.Rfc1 Nh5 27.Qc2 Rff8 (27...Raf8 28.Rf1+=) 28.Qd1 (28.Rb6 Rac8 29.Qd1 Ra8=) 28...g6 29.R1c2 Ng7 30.Nc1 Rf6 31.Nb3 Nf5 32.Nc5 Qc6 (32...Bc5!? 33.dc5 Qc6 34.Bf6 a5+=) 33.Ne4!+/– Qb7 (33...de4 34.Rc6 Discovered attack) 34.Nf6 Kg7 35.Ng4 Rc8 36.Nh2 Rc4 37.Nf3 h6 38.Nd2 Rc7 39.Nb3 Qc8 40.Rc7 Bc7 41.Nc5 Bd6 42.e4 Ne7 43.Qf3 Bb8 44.e5 Ng8 45.Bc1 a5 (45...Ba7 46.Be3+–) 46.Qg4 Kf7 47.Qf4 Kg7 48.Bd2 (48.Qh4 Ba7 49.Bh6 Kf7+–) 48...ab4 49.ab4 Ba7 50.Qf3 Bc5 51.bc5 Qa6 52.Qc3 Ne7 53.Kh2 Qc6 (53...Qa2 54.g4+/–) 54.Qa5 Qd7 55.h4 Nc6? (better is 55...Nf5!?+/–) 56.Qb5+– Ne5 57.Qd7 Nd7 58.Ba5 (58.c6!? Nb6+–) 58...Nb8 59.Bc7 Nc6 60.Be5 Kf7 61.f4 h5 62.Kg3 Ke8 63.Kf3 Kd7 64.Ke3 Ne7 65.Kf3 Nc6 66.Bf6 Na5 67.g4 hg4 68.Kg4 Ke8 69.Kg5 Kf7 70.Be5 Nc6 71.h5 gh5 72.Kh5 Ke7 73.Kg6 Kd7 74.Bf6 Nb4 75.Bh4 Nc6 76.Bf2 Ke7 77.f5 ef5 78.Kf5 Kd7 79.Kf6 Nb4 80.Ke5 (better is 80.Bg3+–) 80...Kc6 ½–½. Kalanyos,Ferenc (2010) – Varga,Istvan, HUN–chT2 Asztalos, 2005.

6.Nc3 c6 7.Qc2 d5 8.d4 (8.Nge2 a5 9.ba5 Nbd7+=) 8...Be6 (8...h6 9.Be2+=) 9.c5 (9.Nge2 dc4 10.Nf4 Bd5+=) 9...Nbd7 (9...a5 10.b5+=) 10.Nge2 b6 (10...Nh5 11.Ng3 Ng3 12.hg3+=) 11.Nf4= Bf5 (11...bc5 12.bc5 (worse is 12.Ne6 fe6 13.bc5 Ng4+=) 12...Bf5 13.h3=) 12.h3 bc5 (12...g5 13.g4 gf4 14.gf5 bc5 15.dc5=) 13.bc5 Rb8 (13...g5 14.Nfe2=) 14.g4 Be6 (14...Bg6 15.Rb1=) 15.Be2 (15.Bg2 h6+=) 15...h6= 16.Rb1 Nh7 17.h4 (17.Qa4 Qc7=) 17...Bh4 18.Qa4 Qc7?? (better is 18...Rc8=) 19.Rh4+– (19.Ne6?! Bf2 20.Kf2 fe6 21.Ke1 Ng5+=) 19...Ng5 20.Na2 Nf3 (20...a5 21.Nc3+– (worse is 21.Ne6 fe6 22.Nc1 Nf3 23.Bf3 Rf3+/–)) 21.Bf3 ef3 22.Nb4 Nf6 (22...Rbc8 23.Ne6 fe6 24.Nd3+–) 23.Ne6 (23.Nc6 Rb7 24.Nb4 a5 25.Ne6 fe6+–) 23...fe6 24.Na6 (24.Nc6 Rb7+–) 24...Qe7 (24...Qf7 25.Nb8 Qg6+–) 25.Nb8 Rb8 (25...Ne4 26.Rh5 Rb8 27.Qc6+–) 26.Qc6 Ne4 27.Rh5 Nc3 (27...Kh7 28.Qa4+–) 28.Rc1 Ne2 (28...Ne4 29.Rc2 Kf7 30.Re5+–) 29.Rc2 Qf6 (29...Rd8 30.Qa6 Rb8 31.Rh3+–) 30.Re5 Qh4 (30...Ng1 31.Re6 Qf7 32.Qd5+–) 31.Qe6 Kh8 32.c6 Qh1 33.Kd2 Qg1 34.c7 Rf8 (34...Qd1 35.Kd1 Nd4 36.cb8Q Kh7 37.Qbg8) 35.c8Q 1–0. Janek – Lawot, internet, 2017.

6.Nc3 c6 7.Nge2= d5 (7...a5 8.b5 (8.Nd4 ab4 9.ab4 Ra1 10.Qa1 Bb4 11.Be2 Na6 12.0–0) 8...d5 9.cd5 cd5 10.Nd4 Nbd7 11.Be2 Ne5 12.0–0) 8.Nd4 (8.Nf4 d4 9.ed4 a5 10.Be2 Qd4 11.0–0 Na6 12.d3) 8...Nbd7 (8...a5 9.cd5 cd5 10.b5= Nbd7 (10...Be6 11.Be2 Qd6 12.0–0) 11.Be2 Ne5 12.0–0; 8...Bg4 9.f3 (9.Qc2 a5 10.h3 Bd7 11.b5 Bd6 12.g4) 9...Bh5 10.Qb3 (10.cd5 cd5 11.Be2 Nbd7 12.fe4) 10...ef3 11.gf3 Nbd7 12.cd5) 9.cd5 cd5 10.Be2 (10.Qb3 Ne5 11.Be2 a6 12.Rc1) 10...Nb6 (10...a5 11.0–0= ab4 12.ab4; 10...Ne5 11.0–0 a6 12.d3) 11.0–0+= Nc4 (11...Bd7 12.Rc1= (12.d3=); 11...Be6 12.Rc1) 12.Bc4 dc4 13.Qc2 b6 (13...a5 14.Ne4 Ne4 15.Qe4 ab4 16.ab4 Ra1 17.Ra1 Bb4 18.Bc3+=) 14.Ne4+/– Bb7 (14...Ne4 15.Qe4 Bd7 16.Qb7+/–) 15.Nf6 Bf6 16.Qc4 Rc8 17.Qd3 (17.Qb5 g6+/–) 17...Qd5 18.f3 Rfd8 19.Rfc1 Qg5 (19...Be5 20.h3+/–) 20.a4 Bf3 (20...Be5!?+/–) 21.Nf3+– Rc1 (21...Rd3?? 22.Rc8 (22.Ng5?! Rc1 23.Rc1 Bg5+–) 22...Rd8 23.Rd8 Bd8 24.Ng5 Bg5 25.Rc1+–) 22.Rc1 Rd3 23.Ng5 Bg5 24.Bd4 h6 (24...h5 25.Rc8 Kh7 26.Rc7+–) 25.Rc8 Kh7 26.Rc7 Rd2?? (better is 26...Bf6 27.Bf6 gf6 28.Rf7 Kg6 29.Ra7 Rd2+–) 27.Rf7 Kg6 (27...Kh8 28.Ra7 Kg8 29.Bb6+–) 28.Rg7 Kf5 29.Ra7 Ke4 (29...Bh4 30.g3 Bd8 31.Rd7+–) 30.Bb6 Kd3 (30...Rd1 31.Kf2 Bf6+–) 31.Rd7 (31.Rd7 Kc3 32.Rd2 Kb4 33.Ra2+–) 1–0. pierre – schakkoli, chesshere.com, 2008.

6.Nc3 d5 7.cd5 Bg4 8.Be2 Be2 9.Nge2 c6 10.dc6 Nc6 11.Nb5 a6 12.Nbd4 Rc8 13.Nf5 Re8 14.0–0 Bf8 15.Nf4 g6 16.Nd4 Bg7 17.Nc6 Rc6 18.d4 Nd5 19.Nd5 Qd5 20.Rc1 Rec8 21.Qd2 b5 22.Rc6 Rc6 23.Rc1 Rc1 24.Qc1 Qc4 25.Qc4 bc4 26.Kf1 Kf8 27.a4 Ke8 28.Ke2 Kd7 29.Kd2 Bf8 30.Kc3+– Bd6 31.h3 a5 32.b5 Bb4 33.Kc4 Be1 34.f3 ef3 35.gf3 f5 36.Bc3 Bf2 37.Kd3 g5 38.Ke2 Bg1 39.Ba5 h6 40.Bb6 h5 41.e4 1–0. algernon (1700) – hsingletary (1725), net–chess.com, 2001.

6.Nc3 d5 7.Nh3=.

6.Nc3 Re8 7.d3 ed3 8.Bd3 a5=.

6.Nc3 Re8 7.Nh3 d5 8.cd5 Bh3 9.gh3 Nd5 10.Ne4 Bf6 (better is 10...Bb4!? 11.Rg1 g6+=) 11.Nf6+/– Nf6 12.Qf3 Qd5 13.Bg2 Qf3 14.Bf3 Nc6 (14...Ne4+–) 15.Bf6 gf6 16.Rc1 Re6 (16...Ne5 17.Bb7 Nd3 18.Ke2 Nc1 19.Rc1+–) 17.d4! Nd4 18.Bb7 Rae8 (18...Rd8+–) 19.Kf1 Nf5 20.Rc7 R6e7 21.Re7 Re7 22.Bc6 Rc7 23.Be4 Rc1 (23...Nd6 24.Rg1 Kh8 25.Bd5+–) 24.Ke2 Rh1 25.Bh1 (25.Bf5 Ra1+=) 25...Nd6 26.Kd3 Kf8 27.Be4 h5 28.h4 f5 (28...Kg7 29.Kd4+–) 29.Bf3 Nb5 30.a4 (worse is 30.Bh5 Na3 31.Be2 Nb5+–) 30...Nd6 31.Bh5 Ke7 32.Bf3 a6 (32...f4 33.ef4 Ke6 34.h5+–) 33.Be2 Ke6 (33...f4 34.ef4 Ne8 35.Kd4+–) 34.Kd4 f4 35.e4 f5 36.e5 Ne4 37.Ba6 Nf2 38.Bc8 Ke7 39.a5 f3 40.a6 Ng4 41.a7 f2 42.Ba6 f4 43.a8Q Nh2 44.Qa7 Ke6 (44...Ke8 45.e6 Nf3 46.Ke4 Nd2 47.Ke5 f1Q 48.Qd7 Kf8 49.Qf7) 45.Bc8 1–0. usingprogram (2005) – mirus41, kurnik, 2013.

6.Nc3 Re8 7.Nh3= d6 (7...Nc6 8.Ng5=) 8.Ng5 Nc6 (8...Bf5 9.Qc2=) 9.Be2 Bf5 10.Qc2 e4 draws heavy fire 10...Bg6 (10...h6 11.Nge4 Ne4 12.Ne4+=) 11.0–0 (11.Nce4? h6 12.Qc3 hg5 13.Ng5 Bf8–+; 11.Nge4?! a5 12.b5 d5 13.bc6 de4 14.cb7 Ra7+/–) 11...Qd7 (11...Bf8 12.b5 Na5 13.Nh3+=) 12.b5 (12.Nce4?! h6 13.b5 hg5 14.bc6 bc6 15.Nf6 Bf6=) 12...Nd8 (12...Ne5 13.Nge4 Ne4 14.Ne4+/–) 13.Nge4 (worse is 13.Nce4 d5 14.cd5 h6+=) 13...Ne4 (13...a6 14.f4 Ne4 15.Ne4 ab5 16.cb5+/–) 14.Ne4 Bh4 (14...d5 15.cd5 Be4 16.Qe4 Ba3 17.Qc2 Bb2 18.Qb2 Qd5 19.Ra4+–) 15.d3 (better is 15.Bf3+/–) 15...d5? (better is 15...f5!? 16.Ng3 a6+/–) 16.Nc5+– Qc8? (16...Qd6 17.cd5 Qd5+–) 17.cd5 b6 (17...Be7 18.Rfc1+–) 18.Na6 Nb7 (18...Qd7 19.Qc4 Be7 20.Nc7+–) 19.Nc7 Re7 20.Rac1 Nc5 (20...Rb8+–) 21.Na8 Qa8 22.Qc4 Rc7 (22...Bf6 23.Bf6 gf6+–) 23.Qh4 Qc8 (23...Rd7 24.e4 Qd8+–) 24.d6 (24.d6 Rd7 25.d4+–) 1–0. pierre – estmeny, internet, 2010.

6.d3 a5 7.b5 c6 (7...d5!?+=) 8.de4= Ne4 9.Bd3 Bf6 (9...d5 10.cd5 Qd5 11.Qc2=) 10.Be4 Bb2 11.Bh7 Kh7 (11...Kh8 12.Ra2 Ba3 13.Na3 (13.Ra3?! Kh7 14.Qd3 Kg8+=) 13...Kh7 14.Qd6+/–) 12.Qc2+/– Kg8 13.Qb2 d5 14.bc6 Nc6 15.cd5 Qd5 16.Ne2 (16.Ne2 Qg2 17.Rg1+–) 1–0. Sternik,Ryszard – Hansson,Ronald, corr SVE–POL, 1992.

6.d3= a5 7.de4 ab4 8.e5=.

6.d3 Nc6 7.b5 Na5 8.Nc3 (8.Qc2 d5 9.cd5 Qd5+=) 8...ed3= 9.Bd3 d6 (9...a6 10.a4+=) 10.Nd5+= Nd5 11.cd5 Bf6 12.Bf6 Qf6 13.Rc1 Qe7 (13...Qg5!?+/–) 14.Qc2+– c5 15.dc6 g6 (15...bc6 16.Bh7 Kh8 17.bc6+/–) 16.Qa4 b6 (16...Qc7 17.Ne2 bc6 18.bc6+–) 17.Ne2 Be6 18.Nd4 Rfc8 19.0–0 Rc7 20.Rfd1 f5 (20...Re8 21.Qb4+–) 21.Ne6 Qe6 22.Qa5 (22.Be2!? a6+–) 22...ba5 23.Bc4 Qc4 24.Rc4 Rd8 (24...Rb8 25.g4 Rb5 26.Rd6+–) 25.Rcd4 Kf8 26.Rd6 Rd6 27.Rd6 Ke7 28.Rd4 (28.Rd1 a4+–) 28...Ke6 (28...a6 29.a4+–) 29.Kf1 g5 (29...a6 30.a4+–) 30.Ke2 h5 Black prepares the advance g4 31.h4 g4 (31...a6 32.Rd7 Rc8 33.ba6+–) 32.Rd8 Ke7 (32...g3 33.fg3 a4 34.Rh8+–) 33.Rh8 Kd6 34.Rh5 Ke6 (34...Rf7 35.f3+–) 35.Kd3 Kf6 (35...Rf7 36.Rh8+–) 36.e4 fe4 37.Ke4 Kg6 (37...Re7 38.Kf4+–) 38.Rd5 Kh6 (38...Rc8+–) 39.Rd7 (39.Rd7 Rc8 40.Ra7 Re8 41.Kd5 Rd8 42.Ke6 Re8 43.Kd7+–) 1–0. pierre – tata_romy, ChessHere.com, 2005.

6.d3= d5 7.cd5 Qd5 8.Nc3 Qe6 9.de4 Ne4 10.Ne4 Qe4 11.Qd3 Bf5 (11...Qe6 12.Ne2=) 12.Qe4+= Be4 13.0–0–0 (13.Rd1 a5 14.b5 c6+=) 13...Nc6 (13...c5 14.f3 Bf5 15.b5=) 14.f3 Bg6 (14...Bf5 15.e4 Be6 16.Bd3=) 15.Nh3 Rfd8 16.Bc4 Rd6 17.Nf4 Rad8 (17...Bg5 18.g3+=) 18.Nd5 R6d7 (18...Bg5 19.h4 Ne7 20.hg5 Nd5 21.Bd5 Rd5 22.e4 Rd1 23.Rd1 Rd1 24.Kd1+/–) 19.Ne7+/– Ne7 20.e4 (20.Rd7 Rd7 21.e4 Kf8+/–) 20...Kf8 21.Rd7 Rd7 22.Rd1 Rd1 23.Kd1 f6 24.Bd4 b6 (24...a6 25.Bd3+/–) 25.Kd2 (25.Be3 Bf7 26.Be2 c6+/–) 25...c6 (25...Bf7 26.Bb5+/–) 26.a4 Nc8 (26...f5 27.e5+/–) 27.a5 (27.Ba6 Ne7+–) 27...b5 (better is 27...Bf7 28.Ba6 Be6+/–) 28.Be6 Nd6 29.Ba7 Ke7 30.Bg8 Nc8 (30...Kd7 31.a6 Nc4 32.Kd3 Ne5 33.Kd4+–) 31.Bc5 Kd7 32.a6 Kc7 33.Be6 (33.Ke3 Nb6 34.a7 Na8+–) 33...Nb6 34.a7 (34.Bf8 Nc4 35.Kd3 Kb6+–) 34...Na8 35.Bf8 Kb7 36.Bg7 Ka7 (36...Nc7 37.Bd7 Ne8 38.Bc6 Ka7 39.Bf8+–) 37.Bf6 Nc7 38.Bb3 Ne8 (38...Na6 39.Kc3+–) 39.Be5 (39.Be7 Kb7+–) 39...Kb7 (39...Kb6 40.Bd4 Kb7 41.Bc5+–) 40.Ke3 Nc7 (40...Kc8 41.f4+–) 41.f4 Na6 (41...Bh5 42.f5 Kb6 43.f6+–) 42.Bd6 Kb6 (42...Kc8 43.Be6 Kd8 44.f5+–) 43.f5 Be8 44.Kd4 Nc7 45.f6 Bd7 (45...Bh5+–) 46.f7 1–0. pierre – tata_romy, ChessHere.com, 2005.

6.Ne2 a5 7.b5+=.

6.Ne2 c6 7.Nec3 d5 8.d3 (8.cd5 cd5 9.d3 Bf5+=) 8...Bf5 (8...dc4 9.dc4 Qd1 10.Nd1+=) 9.Be2 Re8 (9...dc4 10.dc4 Qd1 11.Nd1+=) 10.0–0= Nbd7 (10...a5 11.de4 de4 12.c5=) 11.cd5 cd5 12.de4 de4 (12...Be4 13.Ne4 de4 14.Qd4+=) 13.Nd2 (better is 13.g4!? Be6 14.g5+/–) 13...Bf8 (13...a5 14.ba5 Nc5 15.Bb5=) 14.Nc4 Bg6 (14...Be6 15.Nb5 Qb8 16.Rc1+=) 15.Nd6 Bd6 16.Qd6 Re6 17.Qe6?? (better is 17.Qg3+=) 17...fe6–+ 18.Bc4 (18.Rfd1 Rc8–+) 18...Qe7 19.Nb5 Rc8 (19...Nb6 20.Be2–+) 20.Bb3 (20.Rac1 Nb6 21.Bb3 Be8 22.Rc8 Nc8–+) 20...a6 21.Bf6 (21.Nd4 Nd5–+) 21...Nf6 22.Nd4 Nd5 23.f4 (23.Rac1 Rc1 24.Rc1 Be8–+) 23...ef3 24.Nf3 (24.Rf3 Be4 25.Rg3 b6–+) 24...Rc3 25.Bd5 (25.Nd4 Re3 26.Rac1 Qe8–+) 25...ed5 26.Rfe1 Re3 27.Kf2 Re1 (27...d4 28.Rac1–+) 28.Re1 Qf6 29.Kg3 (29.Re3 b5 30.Kg3 Qb2–+) 29...Be4 (29...Qc3 30.Re5 Qa3 31.Rd5 Qb4 32.h4–+) 30.Rc1 (30.Re3 g5 31.h3 Qf4 32.Kf2 d4–+) 30...Qd6 31.Kf2 Qf4 (31...Bf3 32.Kf3 Qf6 33.Ke2 Qe5 34.Kd3 Qh2 35.Rc5 Qg2 36.Rc8 Kf7 37.Rc7 Ke6 38.Rb7 Qf3 39.Kd2 Qa3 40.Ke2–+) 32.Rd1 (32.Rc8 Kf7 33.Rc3 d4–+) 32...g5 (32...g5 33.h3 h5–+) 0–1. Zimmer,Georg – Frenzel,Lothar, corr SOK–92–86, 1992.

4.a3 g6

5.Nc3 Bg7 6.Ne4 0–0 7.Nf6 Bf6 8.Bf6 Qf6 9.e3 a5 10.b5 c6 11.a4 d5 12.cd5 cd5 13.d4 Bf5 14.Bd3 Nd7 15.Bf5 Qf5 16.Nf3 Nf6 17.0–0 Ne4 18.Rc1 Rac8 19.Qb3 g5 20.Qb2 h5 21.b6+– h4 22.Nd2 h3 23.Ne4 Qe4 24.gh3+– Kg7 25.Rc7 g4 26.hg4?? Qg4= 27.Kh1 Qf3 28.Kg1 Rce8?? 29.Rfc1+– Re4 30.Rb7 Rh8 31.Kf1? Rh2–+ (31...Rh2 32.Rf7 Kf7 (32...Qf7?! 33.Rc7 Re7 34.Re7 Qe7 35.Qd2=+) 33.Rc7 Ke6 34.Re7 Ke7 35.Qa3 Kd7 36.Qd6 Kd6 37.Ke1 Qf2 38.Kd1 Qd2) 0–1. algernon (2295) – clochard (2185), net–chess.com, 2005.

5.Nc3 Bg7 6.Ne4+/– 0–0 7.Nf6 Bf6 8.Bf6 Qf6 9.Nf3 d6 10.e3 Bg4 11.Be2 Nd7 12.d4 c5 13.0–0 a5 14.bc5 dc5 15.d5 Bf3 16.Bf3 Ne5 17.Be2 Qd6 18.e4 b6 19.f4 Nd7 20.e5 Qe7 21.Bf3 Rab8 22.a4 Rfe8 23.Ra2 f6? 24.e6 Nf8 25.d6 Qg7 26.e7 Nd7 27.Bc6 (27.Bc6 Nf8 28.Be8 Re8 29.ef8N Qf8 30.Qd5 Qf7 31.Rd2+–) 1–0. Snide – damage_kase, playchess.de, 2001.

4.Qb3 c6

5.Nc3 d5 6.cd5 cd5=.

5.d3 ed3 (5...d5 6.cd5 e3 7.dc6 ef2 8.Kf2 Nc6 9.b5 Ng4 10.Ke1 Bb4 11.Bc3+=) 6.e3= Qe7 7.a3 d5 8.Bd3 Be6 9.Nf3 dc4 10.Bc4 Bc4 11.Qc4 Nbd7 12.0–0 g6 13.Rd1 Bg7 14.Nc3 0–0 15.Rd3 Nb6 16.Qc5 (better is 16.Qh4!?+=) 16...Qc5+= 17.bc5 Nbd5 (better is 17...Nc4!? 18.Rb1 Nb2 19.Rb2 Ne4 20.Ne4 Bb2–/+) 18.Nd5+= Nd5 19.Bg7 Kg7 20.Nd4 Rfe8 21.Rb1 b6 (21...Reb8 22.h3+/–) 22.Nc6 Rec8 23.Rd5 Rc6 24.cb6 Rb6 25.Rbd1 Rb3 26.a4 a5 (26...Rb2 27.a5+/–) 27.Kf1 Rb2 28.g4 Rc8 29.Kg2 (better is 29.R1d4!?+–) 29...Rcc2+= 30.h3 (worse is 30.Ra5 Rf2 31.Kg3 Rg2 32.Kf4 Rbf2 33.Ke5 Rg4=) 30...Rf2 31.Kg3 Rg2 32.Kh4 (better is 32.Kf4+=) 32...Rb3 33.Ra5 Re3 34.Rb5 Rh2 (better is 34...h6 35.Rh1 Rgg3–+) 35.g5–/+ Rhh3 36.Kg4 h5 37.gh6 Kh6 (37...Rh6?! 38.Rb7 Reh3 39.Rdd7 R6h4 40.Kg5 Rh5 41.Kf4–/+) 0–1. marekt – Januarius, ChessWorld.net, 2012.

5.d3 d5+= 6.de4 (6.cd5 ed3 7.dc6 Nc6=) 6...dc4–/+ 7.Qc4 Be6 8.Qd3 Bb4 9.Bc3 Qa5 10.a3 Bc3 11.Qc3 Qa4 12.f3 (12.Nd2 0–0–/+ (worse is 12...Ne4 13.Qg7 Rf8 14.Ne4 Qe4 15.Rd1=)) 12...Na6 (12...0–0 13.Qb4 Qb4 14.ab4–/+) 13.e3+= 0–0–0 (13...0–0!?+=) 14.Nd2= Nc7 15.Rb1 Rd7 16.Be2 (16.Rb4 Qa5=) 16...Rhd8+= 17.Rb2 Nfe8 (17...b6 18.Bc4+=) 18.g4 (18.Bd1!? Nb5 19.Qc6 (worse is 19.Ba4 Nc3 20.Bb3 Bb3 21.Nb3 Rd3–/+) 19...bc6 20.Ba4=) 18...Nd6+= 19.Nb1 Ndb5 (19...f6 20.Nd2+=) 20.Qc5 Na6 (20...Qa5 21.Rb4–/+) 21.Qe5 Bc4 22.Kf2 g6 23.Bc4 Qc4 24.Ne2 Nc5 25.Nf4 Nd3 (25...Na4 26.Rb4 Qc2 27.Kg3–/+) 26.Nd3 Rd3 27.Re1 Na3 (27...h6+=) 28.Qe7 (28.Na3 Ra3 29.Reb1=) 28...Nb5–/+ 29.Rb4 (29.Qh4 f5–/+) 29...Qe6 (29...Qa2 30.Re2 Qe6 31.Qh4–/+) 30.Qh4 a5 (30...h5 31.g5–/+) 31.Ra4 Qe5 (31...b6 32.Qh7 Qb3–+) 32.Ra5= Qb2 33.Kf1 (better is 33.Kg1!? Kd7 34.Qh7=) 33...Kc7–/+ 34.Qf2 Qb3 (better is 34...Qf2 35.Kf2 Kb6–/+) 35.Ra1?? (better is 35.Kg2+=) 35...Rd1–+ 36.Qe2 (36.Rd1 Rd1 37.Kg2 Rb1 38.Ra2–+) 36...Re1 (36...Re1 37.Ke1 Nc3+=). Diener,Rudolf – Roggensack_Hanspach,Peter, corr SOK–87–14, 1987.

5.e3 a5 6.a3 (6.ba5 Na6=) 6...ab4 7.ab4 Ra1 8.Ba1 Na6 9.b5 Nc5 10.Qc2 d5 (10...Be7 11.d4 ed3 12.Bd3=+) 11.bc6 (11.Bd4 Be7=+) 11...bc6 12.cd5 (12.Bd4 Be6=+) 12...Nd5 13.Bg7 Nb4 (13...Bg7 14.Qc5) 14.Qc4?? (14.Qc3 Ncd3 15.Bd3 Nd3 16.Ke2 Bg7 17.Qg7 Ke7=) 14...Ba6?? (better is 14...Nbd3 15.Bd3 Qd3 (15...Nd3 16.Ke2 Bg7 17.Qc6 Kf8 18.Qe4–+) 16.Qd3 Nd3 17.Ke2 Bg7–+) 15.Qc3?? (better is 15.Qb4!? Bf1 16.Kf1 Qd3 17.Ne2 Bg7 18.Qc5 Qb1 19.Nc1 Qb5 20.Qb5 cb5 21.d4+=) 15...Bg7 (15...Nbd3 16.Kd1 Qb6 17.Bd3 Nd3–+) 16.Qg7=+ Ncd3 (16...Nbd3 17.Ke2 Rf8 18.Nh3=+ (18.Qh7 Nb2 19.Ke1 Ncd3 20.Bd3 Qd3 21.Qe4 Qe4–+)) 17.Bd3 Nd3 18.Ke2 Nf4 (18...Rf8 19.Qc3 Qd5 20.Na3–/+) 19.Kd1= Ng6 20.Ne2?? (better is 20.Nc3=) 20...Be2–+ 21.Ke2 (21.Ke1–+) 21…Qd3 (22.Ke1 Qb1 23.Ke2 Qh1–+) 0–1. Kreutz,Daniel – May,Marcel, Koeln KSV–ch, 1997.

5.e3 d5 6.Nc3 =+.

5.e3 d5 6.d4 Be7 7.Nd2 0–0 Black terminates the opponent with strong threats 8.h3 (8.cd5!? cd5 9.Rc1+=) 8...dc4–/+ 9.Bc4 b5 10.Be2 Be6 11.Qc3 (11.Qc2 Bb4 12.a4 a6–/+) 11...Nd5 12.Qc2 f5 (12...Nb4 13.Qe4 Ba2 14.Ra2 Na2 15.Bd3–/+) 13.a3 a5 14.ba5 Qa5 15.g4 (15.h4 Rc8–/+) 15...Bh4–+ 16.Rh2?? (better is 16.gf5 Ne3 17.Qe4–+) 16...Ne3 (16...Ne3 17.Qc1 Qc7–+) 0–1. Clark,Mark – Marko,Martin, BI–2007–P–00015, 2007.

5.e3 d5 6.cd5 cd5 7.d4 Bd6 8.Nc3 a6 9.b5 0–0 10.Ba3 (10.Nd5?? Nd5 11.Bc4 Nb6–+) 10...Be6 11.Bd6 Qd6 12.Nge2 g5 (12...Rc8 13.Nf4+=) 13.Nc1 Nbd7 14.Be2 Nb6 15.0–0 a5 16.a4 Rac8 17.N1a2 Nc4 18.Bc4 Rc4 19.Rfc1 Ng4 20.g3 h5 21.Ne2 f5 22.Rc4 dc4 23.Qd1 f4 24.ef4 gf4 25.h3?? (better is 25.Qd2=) 25...Nf2! 26.Kf2 fg3 27.Kg1 Bh3 (27...Rf2!? 28.Nac3 Bh3 29.Ne4–/+) 28.Qd2–/+ Rf2 (better is 28...Qd5!? 29.Nac3 e3 30.Nd5 ed2 31.Ng3 Bg4+=) 29.Qg5= Kf8 30.Nac3 Rg2 31.Kh1 Rh2 32.Kg1 g2?? (better is 32...Rg2 33.Kh1 Rh2 34.Kg1 Rg2=) 33.Rd1?? (better is 33.Ng3 Qg3 34.Qg3 Rh1 35.Kf2 Ra1 36.Qb8 Kg7 37.Qb7 Kf8 38.Qa8 Kf7 39.Qd5 Kf8 40.Ne2+–) 33...Rh1–+ 34.Kf2 Rf1 35.Ke3 Bg4 36.Ne4 (36.d5–+) 36...Qa3 37.N4c3 Rd1 (37...Qc3 38.Nc3 g1Q 39.Ke4 Bf3 40.Kf5 Bd1 41.Kg6 Bc2 42.Ne4 Be4 43.Kh6 Qd4 44.Kh5 Rh1 45.Kg4 Rg1 46.Kh5 Qd1 47.Kh6 Rh1 48.Qh4 Rh4 49.Kg5 Qd8) 38.Qd8 Kf7 39.Qd5 Ke8 40.Qg2 Rd3 41.Kf2 Rf3 42.Kg1 (42.Qf3 Bf3 43.Kf3 Qf8 44.Kg2 Qg7 45.Kf2–+) 42...Qc1 (42...Qa1 43.Kh2 Qe1–+ (43...Rc3 44.Qe4 Kd8 45.Qd5 Kc8 46.Qc5 Kd7 47.Qd5 Ke7 48.Qc5 Ke8 49.Qe5 Kf7 50.Qc7 Bd7 51.Qd7 Kg6 52.Qd6 Kg7 53.Qe7 Kh6 54.Qf8 Kh7 55.Qf7 Kh8 56.Qh5 Kg7 57.Qe5 Kg6 58.Nf4 Kh7 59.Qf5 Kg8 60.Qc8 Kg7 61.Qb7 Kh6 62.Qc6 Kg5 63.Ne2=)) 43.Kh2 (better is 43.Nc1 Rc3 44.Qe4 Kd8 45.Ne2+–) 43...Rh3 (43...Rh3 44.Qh3 Qc2+–). Fischbach,Rainer (1670) – Randt,Karl Heinz (1990), Leipzig VfB op, 2006.

4.Qb3 d5

5.cd5 Nd5 6.a3 Be6 7.Qc2 f5 8.Nc3 Nd7 9.e3 (9.g4 A) 9...fg4? 10.Qe4 (10.Ne4?! a5=) 10...Nf4 11.Qf4+–; B) 9...N7f6 10.Nd5 Nd5=) 9...c5 (9...a5 10.Nd5 Bd5 11.ba5 Ra5 12.d3+=) 10.b5 Nc3 11.Bc3 c4 12.Ne2 Nc5 13.Nd4 Qd7 (13...Nd3 14.Bd3 cd3 15.Qd1+=) 14.Ne6= Qe6 15.Be2 (15.Rc1 Nd3 16.Bd3 ed3=) 15...Nd3+= 16.Bd3 cd3 17.Qb2 Qg6 18.0–0 Bd6 19.f3 0–0 20.fe4 (20.Bd4 Rfc8+=) 20...fe4 21.Be5 Rae8 (21...Rac8 22.Bd6 Qd6 23.Qb3 Kh8 24.Rf7+=) 22.Bd6 Qd6 23.Qb3 Kh8 (23...Qe6 24.Rf8 Kf8 25.Rf1 Kg8 26.Qa4=) 24.Qa4 Qd5 25.Qb4 Rf1 (25...Kg8 26.Rac1+=) 26.Rf1= h6 27.Rf8 (27.Rf4 Qh5=) 27...Rf8+= 28.Qf8 Kh7 29.Qe8 Qf5 30.h3 Qd5 31.Kf2 Qc4 (31...a6 32.b6+=) 32.g4 (32.Qd7 a6+=) 32...Qd5+= 33.h4 a6 34.ba6 ba6 35.h5 (35.Qc8 Qf7 36.Ke1 Qe7–/+) 35...Qb7 (35...Qc4 36.Qd7+=) 36.Kg3 (36.Qg6!? Kh8 37.Qe8 Kh7 38.Qg6 Kg8 39.Qe8 Kh7=) 36...Qc7+= 37.Kg2 Qc4 38.Qg6 Kh8 39.Qe8 Kh7 40.Qe5 (40.Qg6 Kg8=) 40...Kg8 (40...Qc6 41.Qf5 Kg8 42.Kg3+=) 41.Kg3 Qa4 42.Qe6 Kf8 43.Qd6 Kf7 44.Kf4 a5 45.Kf5 Qc4 (better is 45...Ke8!?=) 46.Qd7+/– Kf8 47.Qd8 Kf7 48.Qa5 (48.Qa5 Qc6 49.Qa7 Kf8 50.Qb8 Kf7 51.Qb3 Kf8 52.a4+–) 1–0. Melich,Jindrich (2190) – Cejkova,Miroslava (2080), CZE–chT2b, 1996.

5.cd5 Nd5 6.Nc3 Nc3 7.Qc3 =+.

5.e3 Be6 6.cd5 Nd5 7.Qa4 Nd7 8.Nc3 N5b6 9.Qc2 f5 10.Nb5 c5 11.bc5 Rc8 12.d4 ed3 13.Qd3 Rc5 14.Bd4 (14.Nd6 Bd6 15.Qd6+=) 14...Rd5 (14...Bc4 15.Qc2 Bf1 (15...Rb5?! 16.Bc4 Nc4 17.Qc4 Qa5 18.Kf1=) 16.Bc5 Bg2 17.Bf8 Kf8 (17...Bh1 18.Bg7 Rg8 19.Nd6 Ke7 20.Nf5 Kf7 21.Qc3+=; 17...Rf8?! 18.Nd6 Ke7 19.Nf5 Kf7 20.Ng3+=) 18.Qf5 Qf6 19.Qf6 gf6 20.Na7 Bh1–+) 15.Rc1 (15.Qc3!? Kf7 16.Na7+=) 15...Bb4+= 16.Kd1 Nc5 (16...0–0 17.Na7 Ne5 18.Qc2 Rd4 19.ed4 Qd4 20.Bd3 Nd3 21.Nf3–+) 17.Qc2 (17.Qb1!? Ba5 A) 18.Na7?? Rd4 19.ed4 Qd4 20.Bd3 Nd3 (20...Qd3?! 21.Qd3 Nd3 22.Rc2–+) 21.Qb5 Bd7 22.Qa5 Nf2 23.Ke2 Nh1–+; B) 18.Nh3=) 17...a6 18.Qb2 Ba5 19.Nf3? (19.Qa3 A) 19...ab5?! A1) 20.Rc5?? Rd4 21.ed4 Qd4 22.Kc2 Bb4 (22...Qf2?! 23.Ne2 Nc4 24.Rc4 Bc4 25.Qa5 Be2 26.Qa8 Kf7 27.Qb7 Kg6 28.Qc6 Kh5 29.Be2 Qe2 30.Kb1–+) 23.Bb5 Kf8–+; A2) 20.Bb5 Bd7 21.Qa5 Nd3 22.Bb6 Nc1 (22...Rb5 23.Bd8 Nf2 24.Ke2 Ra5 25.Ba5 Nh1 26.Nf3+–) 23.Kc1 Qc8 24.Bc7 Bb5–+; A3) 20.Qa5 Rd4 21.ed4 Qd4 22.Qd2 Qa4 23.Qc2=; B) 19...Nbd7 20.Nc3 Bc3 21.Rc3 Ne4–/+) 19...0–0?? (19...Nba4 20.Qc2 ab5 21.Bb5 Bd7 22.Bd7 Qd7–+ (22...Kd7?! 23.Ke2–/+; 22...Rd7?! 23.Ke2 b6 24.Qf5–/+)) 20.Nc3 Bc3 21.Qc3 Nba4 22.Qa3 Qb6 (22...Ne4 23.Rc2 b5 24.Ke2–/+) 23.Rc2+= Ne4?? (23...Rc8 24.Nd2 Rdd8 25.Be2+=) 24.Kc1?? (better is 24.Qa4 Qb1 25.Ke2+–) 24...Rd4 (better is 24...Qa5!? 25.Qe7 Bf7=) 25.Nd4 (worse is 25.ed4 Nec3 26.Nd2 Qd4–/+) 25...Nac3 26.Rc3 Nc3 27.Bd3 (27.Qc3 Rc8 28.Qc8 Bc8 29.Bc4 Kf8–/+) 27...Rc8 (better is 27...Ne4!? 28.Be4 fe4–/+) 28.Kd2+= Ne4 (28...Ba2? 29.Rc1 (29.Bf5?! Qc5 30.Qc5 Rc5+/–) 29...Be6 30.Rc3 Rc3 31.Qc3+– (31.Kc3?! Bd5+–); worse is 28...Na2 29.Rb1 Qd8 30.Ne6+–) 29.Ke2? (better is 29.Be4 fe4 30.Ne6 Qe6 31.Qb3+=) 29...Rc3–+ 30.Qa4 Qb2 31.Nc2 b5 32.Bb5 (32.Qd4 Rc2 33.Bc2 Qc2 34.Ke1 Qb1 35.Qd1 Qd1 36.Kd1 Nf2 37.Ke2 Nh1 38.a3–+) 32...Rc2 33.Kd3 (33.Qc2 Qc2 34.Ke1 Qf2 35.Kd1 Qd2) 33...Rd2 0–1. West,Lawrence – Sorensen,Ken, Seattle op–C, 1994.

5.f3 dc4 6.Qc4 Be6 7.Qb5 Nbd7 8.Nc3 ef3 9.Nf3 Rb8 10.e3 a6 11.Qa4 ½–½. usingprogram (2035) – etctal, kurnik, 2012.

4.Qb3 Be7

5.Nc3 0–0 6.e3 c6 7.c5 d5 8.Nge2 b6 9.cb6 Qb6 10.b5 Bb7 11.Nf4 Nbd7 12.Na4 Qc7 13.Rc1 c5 14.d3 ed3 15.Bd3 c4 16.Qc3 a6 17.Bf5 (better is 17.b6 Qd6 18.Bf5-/+) 17...ab5–+ 18.Bd7 ba4 (18...Ra4 19.Bb5 d4 20.Qc2 Qa5 21.Bc3 Qb5 22.Bd4–+) 19.Bg4 (19.Bh3 Rfe8–+) 19...a3 (19...Qb6!? 20.a3 d4 21.Qd4 Qd4 22.ed4 Ng4 23.Rc4–+) 20.Ba1 Rad8 21.Bf3 d4! 22.Qc4 (22.ed4 Qf4 Deflection) 22...Qa5 23.Bc3 dc3 24.Bb7 c2 25.Ke2 Rd2 26.Kf3 g5 27.Rc2 (27.Nd5 g4 (worse is 27...Nd5 28.Bd5 Rd5 29.Rc2–+) 28.Kg3 Nd5 29.Bd5 Rd5 (29...Qd5?! 30.Qd5 Rd5 31.Rc2–+) 30.Qc2 Bd6 31.Kg4 Rd2–+) 27...Rc2 (better is 27...Qf5 28.Bc8 Qc2 29.Qc2 Rc2–+) 28.Qc2 gf4 29.g4 fe3 30.fe3 Qg5 31.Qc4 Bc5 (better is 31...Rb8 32.Rb1 h5–+) 32.Re1 (32.Qf4 Qf4 33.ef4 Re8–+) 32...Re8 (better is 32...Rb8 33.Qf4 Qf4 34.ef4 (34.Kf4?? Rb7 35.Kf3 Rb2–+) 34...Rb7 35.g5–+) 33.Qf4 Qh4 34.Re2 (34.Qg3 Qg3 35.Kg3–+) 34...Qh3 35.Qg3 Qf1 36.Qf2 Qf2 37.Kf2 Ng4 38.Kf3 Re3 39.Re3 Ne3 (39...Be3?! 40.Kg4 Kf8 41.Be4+=) 40.h4 Kg7 41.Kf4 Kf6 42.Bd5 (42.Bf3 Ke6–+) 42...h6 (better is 42...Nd5 43.Ke4 Nc3 44.Kd3 Na2–+) 43.Bc6 Nd1 (43...Nd1 44.Ba4 Bd6 45.Kf3 Nc3–+) 0–1. Gorniewicz,Oskar (1750) – Szulc,Jan, V MFSz Turniej Otwarty POL, 2008.

5.Nc3 0–0 6.g3 c5 7.Bg2 cb4 8.Ne4 Ne4 9.Be4 Nc6 10.Qd3 Ne5?? 11.Be5+– (11…Kh8 12.Nf3+– (12.Bh7?! Bf6 13.Qf5 Be5+–)) 1–0. orane (2175) – doghole, Live Game Caissa's Web, 2004.

5.Nc3 0–0 6.g3 Nc6 7.a3 Nd4 8.Qd1 d5 9.cd5 Nd5 10.Ne4 Bf5 11.Bg2+= Nc6 12.Nc3 Nc3 13.Bc3 Bf6 14.Nf3 Re8 15.Bf6 Qf6 16.0–0 Rad8 17.d3 a6 18.Re1 h6 19.Qb3 Rd6 20.Rac1+= Rde6 21.e3 Qe7 22.d4 Na7 23.Nd2 Nb5 24.Qd5 c6?? 25.Qf5+– Rf6 26.Qd3 Kh8 27.Nc4 Kg8 28.a4 Nc7 29.Qb3 Qe6 30.Qb1 b5 31.Ne5 Qf5 32.Qf5 Rf5 33.Rc6 Rc8 34.Bh3 g6 35.Bf5 gf5 36.ab5 ab5 37.Rec1 Kg7 38.Rc7 (38.Rc7 Rf8 39.R1c5+–) 1–0. Sixty4 – sonnygarcia, playchess.de, 2001.

4.b5 a6

5.a4 Bb4 6.Nh3 0–0 7.Nf4 d5 (7...b6 8.Nc3+=) 8.Qb3= Bd6 9.Nd5 Nd5 10.cd5 ab5 11.Nc3 (11.ab5 Ra1 12.Ba1 Bf5=) 11...ba4 12.Ra4 Ra4 13.Qa4 f5 14.Nb5 Na6 15.e3 Nc5 16.Qd4 Qe7 17.Bc4 (17.d3 Bd7 18.de4 fe4 19.Nd6 cd6+=) 17...b6 (17...Qg5 18.0–0=) 18.0–0 Kh8 (18...f4 19.Nd6 cd6 20.ef4 Rf4 21.Qe3=) 19.Ra1 Nd7 (19...f4!?+=) 20.Nd6+/– cd6 21.Ra7 Rf7 22.Qc3 Qf8 23.Ra8 Nc5? (23...Kg8+–) 24.Ba6!! Rc7 (24...Na6 25.Qc8 Double attack (25.Qc8 Pinning; 25.Qc8 Deflection; 25.Qc8 Decoy; 25.Qc8 Clearance); 24...Ba6 25.Rf8) 25.Bc8 Ne6 (25...Qg8+–) 26.Be6 1–0. usingprogram (2025) – komanc (1695), kurnik, 2013.

5.a4 ab5 6.ab5 d5?? (better is 6...Ra1 7.Ba1 Bc5+=) 7.Ra8+– d4 (7...Nbd7 8.Bf6 Nf6+–) 8.Rb8 e3 (8...Nd7 9.Rc8! Qc8 10.Bd4+–) 9.Rc8! Qc8 (9...ef2 10.Kf2 Qc8 11.Bd4+–) 10.fe3 de3 11.de3 (11.Bf6!? gf6 12.de3 Bc5+–) 11...Bb4 12.Bc3 (12.Bc3 Bc3 13.Nc3+–) 1–0. GuestPPCJ – GuestBVJD, freechess.org, 2017.

5.a4 Bc5 6.e3 0–0 7.Nc3 b6 8.d4 ed3 9.Bd3 Bb7 10.Nf3 ab5 11.ab5 Ra1 12.Ba1 d5 13.cd5 Nd5 14.Nd5 Qd5 15.Qc2 Bb4 16.Ke2 Rd8 (better is 16...c5!? 17.Bh7 Kh8+/-) 17.Rd1+– (17.Bh7?! Kh8 18.Bd3 Bd6+/-) 17...Kh8 18.Bg7! Kg7 19.Qb2 f6 20.Qb4 Qa2 21.Rd2 Bf3 22.gf3 Qf7 23.Rc2 Kh8 24.Qc4 Qd7 25.Qe4 Rc8? (better is 25...Qf7+–) 26.Qf5 Qf5 27.Bf5 Re8 (27...Rg8 28.Rc7 Rg7+–) 28.Rc7 Re5 29.Rc8 Kg7 30.e4 Rb5 31.Rb8 Rb2 32.Ke3 b5 33.Rb7 Kf8 34.Rh7 b4 35.Rb7 Rb3 36.Kf4 Rb1 37.h4 b3 38.h5 b2 (38...Rh1 39.Bg6 b2 40.Rb2+–) 39.h6 1–0. Lorenc,Tomas (2100) – Shikhta,Vladislav (1935), Marianske Lazne CZE, Open, 2012.

5.a4 c6 6.e3 d5 7.Qc2 (7.Nc3 d4 8.ed4 Qd4=) 7...Nbd7 8.cd5 cd5 9.Nc3 Nc5 10.Rc1 (10.Nh3!?+=) 10...d4 11.Ne4? (better is 11.ed4 Qd4 12.ba6 ba6 13.f3 Nd3 14.Bd3 ed3 15.Qb1+=) 11...Nce4–+ 12.Bd4 Bb4 13.Bc3? (better is 13.Nf3 0–0 14.Bd3–+) 13...Bc3 14.dc3 Bf5 15.Bd3 (15.ba6 ba6 16.Bd3 Nf2 17.Bf5 Nh1–+) 15...Nf2! 16.Bf5 (16.Qf2 Bd3 Discovered attack (16...Qd3 Deflection; 16...Qd3 Overloading); 16.Kf2 Bd3 Discovered attack) 16...Nh1 17.Nf3 (17.ba6 Ra6 18.Nf3 g6–+) 17...ab5 18.ab5 (18.Ke2 ba4 19.Rh1 a3–+) 18...g6 19.Bd3 (19.Kf1 Qd5 20.Kg1 Qf5 21.Qf5 gf5 22.Kh1 Nd5–+) 19...Qe7 20.Ke2 (20.e4 Ng4–+) 20...Ng4 21.Qd2 Nhf2 (21...Nhf2 22.Bb1 Rd8–+) 0–1. purplegadge (1765) – gambit_queen (2030), gameknot.com, 2014.

5.a4 d5 6.e3 c6 7.d3 ab5–/+ 8.ab5 Ra1 (8...Bb4 9.Nd2 Ra1 10.Ba1 dc4 11.dc4 Be6 12.Be2 0–0 13.bc6–/+) 9.Ba1 Be6 (9...dc4 10.dc4 Bd6 11.Qc2 Nbd7 12.Nd2 Qe7 13.Ne2+=) 10.bc6 (10.cd5 Bd5 11.Bc3 Be7 12.Nh3 0–0 13.Ng5=) 10...bc6 (10...Nc6 11.cd5 (11.Bc3 ed3 12.cd5 Bd5 13.Qd3+=) 11...Bd5 (11...Qd5 12.Bf6 gf6 13.de4 Bb4 14.Nd2 Qe4 15.Ngf3–+) 12.Bc3 ed3 13.Qd3+=) 11.Qa4 (11.cd5 Bd5 12.Ne2 ed3 13.Qd3+=) 11...Qb6 (11...dc4 12.Bf6 Qf6 13.d4+=) 12.Qc2? (12.Nd2 A) 12...dc4 13.Bf6= (13.dc4 Bb4+=); B) 12...Qb4 13.Qc2=) 12...Na6 (12...ed3 13.Bd3 dc4 14.Be2–+) 13.Nd2 (13.Bf6 Nb4 14.Qd1 gf6 15.de4 dc4–+) 13...Bb4 (13...Nb4 14.Qb1 ed3 15.Bd3 Nd3 16.Qd3 dc4 17.Qc2–+) 14.Kd1 (better is 14.Bf6!? gf6 15.cd5 cd5 16.de4–+) 14...0–0–+ 15.d4 (15.Bd4 Nc5 16.cd5 cd5 17.de4 de4 18.Nh3–+) 15...Bd2 16.Qd2 (16.Kd2 dc4 17.Bc3–+) 16...Rb8 17.c5 (17.cd5 Nd5 18.Bb2 Qb3 19.Qc2–+) 17...Qb3 (better is 17...Qb1 18.Qc1 Qa2 19.Ba6–+) 18.Qc2 Qb1 19.Qc1 (19.Qb1 Rb1 20.Ke2 Ra1 21.Nh3 Ra2 22.Kd1–+) 19...Qa2 0–1. pzn2pawn (1865) – Max Dukeace (1790), redhotpawn.com, 2016.

5.a4 d5 6.Bf6 (6.cd5 Nd5 7.Nc3 Bf5+=) 6...Qf6–/+ (6...gf6?! 7.cd5 Qd5 8.Nc3=) 7.Nc3 dc4 8.Ne4 Qg6 9.Nc3 Bb4 10.Nd5 Ba5 11.Nf3 Be6 12.Nf4 Qf6 13.Ne6 fe6 14.Rc1 (14.ba6 Na6 (worse is 14...Ra6 15.e3+=) 15.e3 c3 16.Bb5 c6 17.Ba6 cd2 (17...ba6?! 18.0–0=; 17...Ra6?! 18.0–0=) 18.Nd2 Bd2 (18...ba6?! 19.0–0 0–0 20.Ne4=; 18...Ra6?! 19.0–0=) 19.Kd2 0–0–/+) 14...c3 15.Qc2? (better is 15.e3 0–0 16.dc3 Bc3 17.Ke2 ab5 18.ab5–/+) 15...cd2–+ 16.Nd2 0–0 17.f3 Rd8 18.Rd1 ab5 19.e3 Rd2 (19...Qe5 20.Kf2 Qd6 21.Ke2 ba4 22.Ne4 Qd1 23.Qd1 Rd1 24.Kd1–+) 20.Rd2 ba4 The passed pawn on a4 will quickly become a dangerous weapon (20...Bd2?! 21.Kd2 Qd8 22.Bd3 ba4 23.Ke2–+) 21.Bd3 (21.Bc4 b5! 22.Bb5 Qe5–+) 21...a3 (21...Bd2?! 22.Kd2 Qh4 23.Ke2–+) 22.Bc4 Nc6 (22...b5!? 23.Ba2–+) 23.0–0 Bd2 24.Qd2 Kh8 25.Ba2 Qb2 26.Qb2 ab2 27.Bb1 Rd8 28.Ba2 (28.f4 Nb4 29.Kf2 c5–+) 28...Na5 29.Be6 c5 30.Bf5 c4 31.Bb1 (31.Re1–+) 31...c3 32.Kf2 (32.Bf5 b5 33.Rb1 b4–+) 32...Rd2 33.Kg3 Nc4 34.Be4 b5 (34...b5 35.f4 c2 36.Bc2 Rc2–+) 0–1. Rosner,Dirk – Luzuriaga,Norberto Horacio, e–mail SOK–99–E007A, 1999.

5.Nc3 Bb4 6.e3 ab5=+ 7.Nb5 d6 8.Ne2 Bg4 9.h3 Bh5?? 10.Qb3?? Bc5 11.Ng3 Bg6 12.Be2 0–0= 13.0–0 c6 14.Nd4 Qd7 15.d3 b6 16.de4 Ne4 17.Ne4 Be4 18.Bf3 Bd4 19.Be4 Bb2 20.Qb2 Ra6 21.a4 Qe6 22.Bd3+= c5 23.Qc2 Qh6 24.Rfe1 Nc6= 25.Qc3 Ne5 26.Reb1 Qg5? 27.Be4 Re8 28.Bb7 Ra7 29.Rb6 Rb8 30.a5?? Rbb7 31.Rb7 Rb7=+ 32.a6 Ra7 33.Qa5? Qe7–+ 34.Rb1 Nc6 35.Qb6 Qe8?? 36.Kf1?? h6–+ 37.Qb3? Nb4 38.Ra1 Qc6 0–1. gtate (2005) – acaudron (2185), net–chess.com, 2004.

5.e3 ab5–/+ 6.cb5 d5 7.Be2 Bd6 8.d4 0–0 9.Nc3 c6 10.bc6 Nc6 11.Nb5 Bb4 12.Bc3 Bc3 13.Nc3=+ Ra3 14.Nb5 Qa5 15.Qd2= Qd2 16.Kd2 Ra4 17.Nc3 Ra7 18.Rb1 Bf5 19.Nh3 Rc8 20.Nf4= Ne7 21.h4 Ng6 22.Ng6+= hg6 23.a4 Bd7 24.Rb4 Rca8 25.Ra1 Ba4?? (25...Ba4 26.Raa4 Ra4 27.Ra4 Ra4 28.Na4 Kf8+–; better is 25...Kh7+=). Psion – Psion, 4 Min, 1990.

4.b5 b6

5.d3 a6+=.

5.e3 a6 6.d3+=.

5.e3 Bb7 6.Qc2 d6 (6...a6 7.f3+=) 7.Ne2 Nbd7 8.Nbc3 Nc5 (8...Be7 9.Nf4=) 9.Nf4 Qd7 (9...a6 10.Be2=) 10.Be2 (10.Ncd5 Nd5 11.cd5 a6+=) 10...h6 (10...a6 11.0–0=) 11.h3 (11.Ncd5 Nd5 12.cd5 a6+=) 11...a5 (11...a6 12.0–0=) 12.ba6 (12.Ncd5 Nd5 13.cd5 Qf5+/–) 12...Ra6 (12...Ba6 13.f3 Bb7 14.Nfd5 ef3 15.Nf6 gf6 16.Bf3 Bf3 17.gf3+/–) 13.0–0 Ra5 (13...Be7 14.Ncd5+=) 14.f3 ef3 15.Bf3 Bf3 16.Rf3 Na4 (16...c6 17.d4 Ne6 18.Ne6 fe6 19.Qb3=) 17.Na4+/– Qa4 18.Qa4 Ra4 19.Bf6 gf6 20.d3 c6 (20...Bg7 21.Rf2+/–) 21.Rb1 Ra6 22.Rb2 h5 (22...Be7 23.d4+/–) 23.Rff2 (23.Ne2 Kd7+/–) 23...Rh6 (23...Bh6 24.d4+/–) 24.Rb3 Be7 25.Rfb2 Bd8 26.Kf2 (26.Ne2 f5+/–) 26...f5 27.Kf3 h4 28.g3 (28.d4 Ra4 29.Rc2 Ra6+/–) 28...hg3 29.Kg3 Bh4 (29...Bc7 30.d4+/–) 30.Kf3 Bd8 31.Rh2 (31.Rg2 Bf6+/–) 31...Kd7 32.Rg2 Bf6 33.a3 (33.d4 Be5+/–) 33...Rh7 (33...Be5 34.Rg3+/–) 34.Rg8 (34.Rg8 Be5 35.Rg3+/–; 34.d4 Be5+/–) 1–0. Mus,Roman – Weber,Krzysztof, corr 2AMM Poland, 1994.

5.e3 Bb7 6.d3 a6+=.

5.e3 Bb7 6.Ne2 a6 (6...Be7 7.Nf4+=) 7.a4 (7.Ng3 Be7+=) 7...Bb4 (7...Be7 8.Nd4+=) 8.Nbc3 0–0 9.Nf4 Re8 (9...c5 10.Na2+=) 10.Qc2 (10.Be2 Bd6=) 10...ab5 11.ab5 Ra1 12.Ba1 h6 (12...Bd6 13.Nfd5+=) 13.Be2= d6 (13...Bd6 14.0–0=) 14.g4 (14.Ncd5!? Nd5 15.cd5+=) 14...Nbd7+= 15.h4 Ne5 16.g5 (16.Rg1!?=) 16...Nd3–/+ 17.Kf1 Nf4 18.gf6 (18.ef4 e3 19.Rh2 Qa8+=) 18...Ne2 19.Ne2 Qa8 (19...g6 20.h5 g5 21.Rg1–/+) 20.Bd4 (20.Bc3 Bc3 21.Qc3 Qa4=) 20...g6+= 21.Nf4 d5 (21...Bc5 22.Bc5 dc5 23.Qc3+=) 22.Rg1 (22.Ke2 dc4 23.Ng6 Bd5=) 22...Bd6+= 23.Ng6 (23.Ke1 Rd8+=) 23...fg6–/+ 24.Rg6 Kf7 25.Rg7 Kf8 26.Qd1 Qc8 27.Ke2 (27.Rf7 Kg8 28.Rg7 Kf8 29.Rf7 Kf7 30.Qh5 Kf8 31.Qh6 Kf7 32.Qg7 Ke6 33.Qg4 Kf7 34.Qg7 Ke6 35.Qg4 Kf7 36.Qg7=) 27...Bh2+= 28.Qh1=. Mroz,Antoni – Frysiak,Adam, corr 2AMM Poland, 1994.

4.b5 Bc5

5.e3 a6 6.a4 ab5 7.ab5 Ra1 8.Ba1 0–0 9.Ne2 c6 10.Ng3 (10.Qc2=) 10...cb5 (better is 10...d5+=) 11.Bf6+/– Qf6 12.Ne4 Qc6 13.Nc5 (13.cb5? Qe4 14.Nc3 Qe6–+) 13...Qc5 14.cb5 d5 15.Be2 Bd7 The isolani on b5 becomes a target 16.Nc3 d4 17.ed4 Qd4 18.0–0 Re8 19.Bf3 Qb6 20.Qb1 Qd6 (20...Re5 21.Be4 g6 22.Rc1+/–) 21.Rd1 b6 22.d4 g6 23.Ne4 Qf4 24.Re1 Kg7 25.Qb2?? (better is 25.Qc1 Qh4 26.g3+–) 25...f5+= 26.g3 (better is 26.d5 Qe5 27.Qb4+=) 26...Qf3–+ 27.d5 Kh6 28.Qd2 Kg7?? (better is 28...f4 29.Qf4 Qf4 30.gf4 Bb5–+) 29.Qd4 Kh6 30.Qd2 f4 31.Nc3?? (31.Qf4 Qf4 32.gf4 Bb5–+) 31...Re1 32.Qe1 Bh3 (32...Bh3 33.Qe4 Qc3–+) 0–1. Labahn,Wolfgang – Schwarze,A, Paderborn GER, 1988.

5.e3 c6 6.d4 (6.d3 d5=) 6...Bb4 7.Nd2 (7.Bc3 Be7=) 7...cb5=+ 8.cb5 d5 9.Ne2 (9.Rc1 0–0=+) 9...0–0 10.a3 (10.Qb3 Bd2 11.Kd2 a6=+) 10...Ba5 (10...Bd6 11.Nc3=+) 11.Nc1 (11.Rc1 a6=) ½–½. Horvath,Peter (2415) – Kozlova,Olga (2240), Harkany op, 1997.

5.e3 d6 6.Nc3 Bf5 7.Qc2 Nbd7 8.f4 Nb6 9.Nge2 Nc4 10.Ng3 e4 seems the pivot of the position 10...Be6 (10...Nb2 11.Nf5 Nd3 12.Bd3 ed3 13.Qd3= (13.Ng7? Kf8 14.Qd3 Kg7–+)) 11.Nge4 (better is 11.Bc4 Bc4 12.Nce4 Bb5 13.Nf6 gf6 14.Ne4+–) 11...Nb2 12.Nc5 dc5 13.Qb2 0–0 14.Be2 Bf5 15.Bf3 Rb8 16.0–0 (16.Qa3 Qd6=) 16...Bd3 17.Rfc1 Qd7 (17...Re8 18.Qa3 a6 19.ba6 Ba6 20.Nb1=) 18.a4 (18.Qa3!?+=) 18...a6 19.Ra3 c4 20.Nd1 ab5 21.ab5 c6 22.b6 Qd6 (22...Ra8 23.Ra7=) 23.Nf2+= Ra8 24.Rca1 (24.Ra7 Rab8+=) 24...Ra3= 25.Ra3 Rd8 26.Nd3 cd3 27.g3 Qc5 28.Rc3 Qe7 29.Qb1 Qd7 (29...Ne4 30.Be4 Qe4 31.Ra3+=) 30.Bg2 Qf5 31.Bf1 Ng4 (better is 31...Qa5!?=) 32.Rd3+/– Rd3 33.Bd3 Qh5 (33...Qa5!? 34.Bh7 Kh8+/–) 34.h4+– Nf6 (34...Qd5 35.Bh7 Kh8 36.Bf5+/–) 35.Qa1 Ne8? (35...Kf8 36.Qa8 Ne8 37.Qb7 Qf3+–) 36.Kf2 (better is 36.Qe5 Qe5 37.fe5+–) 36...Qd5+/– 37.Qa3 (37.Qa8 Kf8 38.Be2 Qd7+/–) 37...g6 (37...Qd8 38.Kg1+=) 38.Qc3 (38.Qa8!? Qd7 39.Be2+/–) 38...Nd6+= 39.Qa3 c5 Black prepares c4 40.Ke1 (40.e4 Qd4 41.Kf3 Nc8=) 40...c4 (40...Qh1!? 41.Ke2 Qc6=) 41.Bf1+= Ne4 42.Qa2 Ng3 (42...Nd6 43.Qa8 Kg7 44.Qd8+/–) 43.Qc4 Qf3 44.Qb5 (44.Qc8 Kg7 45.Qh3 Kg8+–) 44...Kg7 (44...Qh1 45.h5 Nf1 46.Qf1 Qh4 47.Qf2 Qh1 48.Qf1 Qh4 49.Qf2 Qh1 50.Qf1=) 45.Qe5 (45.Bc4 Qh1 46.Kf2 Qh2 47.Kf3 Nf5+/–) 45...Kg8 (45...Kh6 46.Bd3 Qg2 47.Qg5 Kg7 48.Qb5 Qg1 49.Bf1=) 46.Bc4 Qh1 47.Kf2 Ne4 48.Ke2 Qg2? (better is 48...Ng3 49.Kd3 Qb1 50.Kc3 Qc1 51.Kb4 Qd2 52.Ka4 Qd1 53.Bb3 Qd7 54.Ka3 Nf5+/–) 49.Kd3+– Qd2? (49...Nf6 50.Qc7 Qe4 51.Ke2 Qg2 52.Kd1 Qg4 53.Kc1 Qd7+–) 50.Ke4 Qc2 51.Bd3 (better is 51.Kd5 Qd2 52.Qd4 Qb4+–) 51...Qa4 52.Qd4 f5 (52...Qc6 53.Qd5 Qb6+–) 53.Kf3 Qd1 54.Kf2 Qh1 (54...Qd2 55.Be2 Qd4 56.ed4 Kf8+–) 55.Bc4 Kf8 56.Qf6 Ke8 57.Bb5 1–0. Dumontelle,Joe – Guenther,G, March, 1979.

5.e3 d6 6.Nc3 Bg4 7.Be2 Be6 (better is 7...Bf5!?=) 8.Qc2+= Bf5 9.d3 (9.g4!? Bg6 10.g5+/–) 9...ed3 10.Bd3 Bd3 11.Qd3 Nbd7 12.Na4 (12.Nf3!?=) 12...Bb4+= 13.Nc3 (13.Kf1 a6 14.Qf5 0–0+=) 13...Ne5–/+ 14.Qc2 Qd7 15.Nge2 Qg4 16.0–0 Qc4 17.Nd4 Bc3 18.Bc3 c5 (better is 18...Nd5!? 19.Rfc1 Nd3+=) 19.Nf5 0–0 (19...0–0–0 20.Qb2 Nd3+/–) 20.Nd6+/– Qg4?? (better is 20...Qe6 21.Nb7 Rab8 22.Nc5 Qc4+/–) 21.Be5+– Nd5 (21...Qe6 22.Qc3 (22.Qc5?! Nd7 23.Qb4 Ne5+–) 22...Nd7 23.Bf4+–) 22.h3 (22.Qc5 Qe6+–) 22...Qg5 23.f4 Qg3 (23...Qe7 24.Nf5 Qe6 25.Ng7+–) 24.Rf3 (24.Nb7?! Ne3 25.Qe2 Nf1 26.Rf1 a6+–) 24...Ne3 (24...Qg6 25.Nf5 f6+–) 25.Rg3 Nc2 26.Rg7 1–0. GuestXCSC – GuestGNLS, freechess.org, 2017.

5.e3 0–0

6.Nc3 a6 7.d4 Bb4 8.Qa4 Bc3 9.Bc3 +=.

6.Nc3 c6 7.d4 ed3 (7...Bb4 8.Qa4 Ba5 9.c5+=) 8.Bd3 d5 9.Nge2 Re8 (9...dc4 10.Bc4 Qe7 11.0–0=) 10.0–0 Nbd7 (10...dc4 11.Bc4 Bd6 12.Qb3=) 11.Qc2 (11.cd5 cd5 12.Nf4 Nb6+=) 11...dc4= 12.Bc4 Ne5 13.Ne4 Ne4 14.Qe4 Bd6 15.Rad1 Nc4 16.Qc4 Qc7 17.h3 Be6 18.Qc3 Do you see the mate threat? 18...f6 19.Nd4 Ba2 20.bc6 bc6 21.Qc6 Qc6 (21...Bc4 22.Rfe1+=) 22.Nc6= Bc5 23.Ra1 Rec8 24.Ra2 Rc6 25.Rfa1 ½–½. Trigueros,Gustavo – Murillo T,Alexis, Costa Rica, 1990.

6.Nc3 Re8 7.d4= Bb4 8.Qb3 (8.Nge2 d6=) 8...Ba5 (8...Bc3 9.Bc3 d5 10.h4=) 9.Nge2 c6 10.Nf4 d6 11.Be2 Nbd7 12.a4 Nf8 13.h4 (13.0–0 Ne6=) 13...Ne6 14.Nh3 (14.Ne6 Be6 15.0–0 Bg4+=) 14...d5 (14...c5 15.dc5 Nc5 16.Qc2+=) 15.0–0–0 (15.0–0 Bc7 16.Ba3 c5=) 15...cb5 (15...a6 16.cd5 cd5 17.Kb1–/+) 16.ab5 (16.Nd5!? ba4 17.Qa4 Nd5 18.cd5=) 16...dc4+= 17.Bc4 a6 (17...Bd7 18.Na4 Rc8 19.Nc5=) 18.Ng5 (18.ba6!? ba6 19.Ng5=) 18...ab5+= 19.Be6 (19.Nb5!? h6 20.Ne6 Be6 21.d5+=) 19...Be6–/+ (19...fe6?! 20.Nce4 h6 21.Nf6 Qf6 22.Ne4–/+) 20.d5 Bf5 21.Nb5 (21.d6 Qd7 22.Nd5 Nd5 23.Rd5 b4–/+) 21...Ra6 (21...h6 22.Nh3–+) 22.Nd4? (22.d6 Qd7 23.Nc7 Bc7 24.dc7 Qc7 25.Kb1–+) 22...Rb6 23.Qc4?! (23.Qa4 Qa8 24.Qa3 (24.Nf5?? Bd2 25.Rd2 Qa4–+) 24...Rc8 25.Kb1–+) 23...Qd7 24.Kb1 (24.Qa2 Rc8 25.Nc2–+) 24...Rc8 25.Nc6 (25.Qa2 Bc3–+) 25...bc6 26.dc6 Rbc6 (26...Qe8 27.Rc1 Rcc6 28.Qf7 Qf7 29.Nf7–+) 27.Qa2 (27.Rd7 Rc4 28.Ra7–+) 27...Bd2 28.Rd2 (28.Qf7 Qf7 29.Nf7 Bc3–+) 28...Qd2 29.Qf7 Kh8 30.Qa2 (30.Qb3 Bg6 31.Rd1–+) 30...Qd3 31.Ka1 Qc4 (31...Ra6 32.Nf7 Kg8 33.Nh6 Kf8 34.Ba3 Ra3 35.Nf5 Qc3 36.Kb1 Rb8 37.Qb3 Rbb3) 32.Nf7 (32.Qc4 Rc4 33.Kb1 Kg8–+) 32...Kg8 33.Qc4 Rc4 34.Nd6 Ra8 35.Kb1 Rc5 36.g4 Be6 (36...Be6 37.Bd4 Rc6–+) 0–1. Lorenc,Tomas (2140) – Makevich,Pavel (2055), CZE–ChT2B, 2010.

6.d4 Bb4 7.Nd2 (7.Nc3 d5+=) 7...Re8 (7...a6 8.Qb3 Bd2 9.Kd2–/+) 8.Ne2= d5 9.Nc3 c6 (9...Be6 10.Qb3 Bc3 11.Qc3+=) 10.Qb3+= Bf8 11.h3 (11.Be2 Be6+=) 11...Be6 12.Be2 (12.a4 Nbd7=) 12...cb5= 13.cb5 Nbd7 14.a4 (14.Ba3 Ba3 15.Qa3 Rc8=) 14...Bd6 (14...Qa5 15.0–0=) 15.a5 Nf8 16.b6 ab6 17.ab6 (worse is 17.Qb6 Qb6 18.ab6 Ra1 19.Ba1 Ra8–/+) 17...Ra1 18.Ba1 Ng6 19.Bb2 Nh4 20.g3 Nf5 21.g4 Ne7 (21...Nh4 22.Bb5 Rf8 23.Be2–/+) 22.Ba3 Ba3 23.Qa3 Qb6 24.0–0 Ng6 25.Rb1 Qd8 (25...Qc7 26.Nb5 Qc2 27.Qb2 Qb2 28.Rb2=) 26.Rb7 h5 27.g5?? (better is 27.gh5 Nh4 28.Qc5=) 27...Nh7–+ 28.h4?? (better is 28.Kh1–+) 28...Nh4 29.Kf1 0–1. Hartzell,Ove – Johansson,Jan (2390), Stockholm op2, 1992.

6.d4 Be7 7.Nc3 =+.

4.b5 c6

5.a4 cb5 6.ab5 a6 (6...d5 7.cd5 Nd5 8.Bd4+=) 7.e3 ab5?? (better is 7...b6=) 8.Ra8+– 1–0. GuestPPCJ – GuestKONG, freechess.org, 2017.

5.a4 d5 6.cd5 cd5 7.e3 Be6 8.Ne2 Bc5 9.Nd4 Bd4 10.Bd4= b6 11.Be2+= Nbd7 12.0–0 0–0 13.d3 Rc8 14.h3 Nc5= 15.Bc5 Rc5 16.d4 Rc8 17.Nd2 Qd7 18.Qb3 Rc7 19.Rac1 Rfc8 20.Qb2 Rc1 21.Rc1 Rc1 22.Qc1 Qc8 23.Qc8+= ½–½. hal1958 – Sirius, playchess.de, 2003.

5.a4 d5 6.e3 (--> 1.b4 e5 2.Bb2 e4 3.e3 Nf6 4.b5 d5 5.c4 c6 6.a4).

4.b5 d5

5.cd5 Nd5 6.Qa4 f5 7.Nc3 Nf6 (7...Nb6 8.Qb3+=) 8.e3 Nbd7 9.Nh3 Nc5 10.Qc2 Bd6 11.d4 ed3 12.Bd3 Nd3 (12...f4 13.Ng5 fe3 14.Bg6 hg6 15.Qg6 Kd7 16.Qg7 Qe7 17.Qh8=) 13.Qd3= Be6 14.Ng5 Qe7 15.Ne6 Qe6 16.0–0 Ng4 17.g3 0–0–0 18.Qc2 Rdf8 (18...Kb8 19.Rfd1=) 19.Bc1 (19.Rfd1 Qh6 20.h4 Ne3 21.fe3 Qe3 22.Qf2 Qg3 23.Qg3 Bg3=) 19...g5 20.b6 ab6 21.Nb5 Qh6 (better is 21...Bc5+=) 22.f3+/– Ne5 23.Ba3 c5 24.Rad1 Bb8 25.Bb2 f4 26.Na7 Ba7 Deflection from e5 27.Be5 With the decisive threat Qa4 27...Rhg8?? (27...fg3 28.hg3 Rhg8 29.Qc4+=) 28.Rd6?? (better is 28.Qa4 Qe6 29.ef4 (29.Qa7?! Qe5 30.ef4 gf4=) 29...gf4 30.Rfe1+– (30.Qa7?! Qe5 31.Rfe1 Qg7=; worse is 30.Bf4 Bb8 31.Bb8 Kb8+/–)) 28...Qh5+/– 29.Rfd1 Threatening mate: Rd8 29...Qf3?? (better is 29...Qe8 30.R6d5 Bb8 31.ef4 Be5 32.fe5 Rf3 33.Qh7 Rgf8+/–) 30.Rd8!! 1–0. Byczek,Jozef – Olej,Emil, corr Poland, 1961.

5.cd5 Nd5 6.e3 Bb4 7.Bg7+= Rg8 8.Bb2 f6? (better is 8...Bf5+=) 9.Qh5+– Ke7 (9...Kf8 10.Bc4 Be6 11.a3+–) 10.Qh7 Ke6 (10...Kd6 11.Nc3 f5 12.Nd5 Kd5 13.a3+–) 11.Qe4 Kf7 12.Bc4 Be6 13.Qh7 Rg7 14.Qh5 Rg6 (14...Kg8 15.Qf3 Be7 16.Nc3+–) 15.Nf3 (better is 15.Bd3 Qg8 16.Nf3+–) 15...Bg4 (15...Kg7 16.Nh4 Rg4+–) 16.Bd5 (better is 16.Qd5 Qd5 17.Bd5 Ke7 18.Bb7 Bf3 19.gf3 a6 20.Ba8 ab5+–) 16...Kg7 17.Qh4 (17.Nd4 c6 18.Ne6 Be6 19.Be6 Qf8+–) 17...Qd5 18.h3 (better is 18.Bf6 Rf6 19.Qg4 Rg6 20.Qb4 Rg2 21.Qe7 Kg8 22.e4 Qb5 23.Qd8 Kh7 24.h4+–) 18...Bf3 19.Qb4 (19.gf3 Qf3 20.Rf1 Bd6+–) 19...Bg2 20.Qe7 (20.Nc3 Qd3 21.Qe7 Kg8 22.Qe6 Kg7+–) 20...Kh6 (better is 20...Qf7 21.Qf7 Kf7+–) 21.Qf8 Kh7 22.Rg1 b6 (22...Qg8 23.Qc5 Qd8 24.Qc2+–) 23.Qe7 Rg7 (23...Kg8 24.Qc7 Qb5 25.Bf6 Na6+–) 24.Qf6 Rg6 (24...Qg5 25.Qg7 Qg7 26.Bg7 Bh3+–) 25.Qh8 1–0. GuestKVBT – sirbastl, freechess.org, 2017.

5.cd5 Nd5 6.e3 Nb4 7.Qb3 (7.Nc3!? Bf5 8.Qb1 Nd3 9.Bd3 ed3 10.Nf3+=) 7...Be6–/+ 8.Qc3 Na2 9.Ra2? (better is 9.Qe5 Nd7 10.Qe4–+) 9...Ba2–+ 10.Qe5 Qe7 11.Qe7 Be7 12.Nc3 Bf6 13.Ba3 (13.Nge2 a6–+) 13...Bc3 14.dc3 Nd7 15.Nh3 a6 16.ba6 ba6 17.Be2 Rb8 18.0–0 Rb3 19.Bb4 (19.Bc1 Rc3 20.Ba6 Rc2–+) 19...c5 20.Bc4 cb4 (worse is 20...Rb4 21.Ba2 Rb2 22.Bc4–+) 21.Bb3 Bb3 22.cb4 Ke7 23.Ng5 Rb8 24.Ne4 Rb4 (24...Rb4 25.f3 a5–+) 0–1. GuestGZHR – GuestHPHW, freechess.org, 2017.

5.cd5 Nd5 6.f3? e3 7.Qa4 (7.de3 Bb4 8.Kf2) 7...Bb4 8.a3 ed2 9.Nd2 Qh4 0–1. Ikes – Groncki, Berlin, 1960.

5.e3 (--> 1.b4 e5 2.Bb2 e4 3.e3 Nf6 4.b5 d5 5.c4).

3.d3 Bb4–+

4.c3 Ba5 5.Qa4+= Nc6 6.Qe4 Nge7 7.e3 0–0 8.Qh4 d5 9.Nf3 Bd7 10.Nbd2 Ng6 11.Qd8 Rad8 12.Be2 Nce5 (12...Rfe8 13.Nb3=) 13.Nb3 (13.Ne5 Ne5 14.Nb3 Nc6+=) 13...Nf3 (13...Nc6 14.Na5 Na5 15.h4+=) 14.Bf3 Ne5 15.0–0–0 (better is 15.Be2!? Nc6 16.Na5 Na5 17.Rg1+=) 15...Bb6= 16.Ba3 White gets strong initiative 16...Rfe8 17.Bh5 (17.Be2 Bg4 18.Kd2 Bf5=) 17...Bb5 (17...Bg4 18.Bg4 Ng4 19.Rd2–/+) 18.Be2= c5 (18...a6 19.Rhe1+=) 19.Bc5 Bc5 20.Nc5 Rc8 21.Nb7 Rc3 Now all is on d3 22.Kb2 Rec8 23.Nd6 Rc2 24.Ka1 Rb8 25.Rhe1 Ba4? (better is 25...Ba6!? 26.Rc1 Rd2=) 26.Rb1+/– The mate threat is Rxb8 26...Rb1 (26...Rb6!?+/–) 27.Rb1+– g6 28.Bd1 Rc6? (28...Rf2 29.Ba4 Rg2+–) 29.Rb8 (29.Ba4?! Rd6 30.d4 Ng4+=) 29...Kg7 30.Ne8 (30.Ba4?! Rd6 31.d4 Nd3+=) 30...Kh6 31.Ba4 Ra6 (31...Rc1 32.Rb1 Rb1 33.Kb1 Nd3+–) 32.Bb5 Ra5 33.Nc7 a6 (33...Ng4 34.Nd5 Nf2 35.Nb4+–) 34.Na6 Nd7 (34...Ng4 35.Nb4 Nf2 36.a4+–) 35.Rb7 Ne5 36.Nb4 Ng4 37.a4 (37.a4 Kg7 38.Nd5 Nf2 39.e4+–; 37.Nc6!? Rb5 38.Rb5 Nf2+–) 1–0. market (1675) – originalsmokedog (1635), GameColony.com, 2002.

4.c3 Bc5 5.de4 Qh4 6.e3 –/+.

4.Nc3 d5 5.d4 e3–+ 6.Nh3? Bh3 7.f3 Bg2! 8.Bg2 Qh4 9.Kf1 Qf2# 0–1. rayner_51 – mrkt, ChessWorld.net, 2003.

4.Nd2 ed3?? 5.Bg7+– de2 (5...Bc3 6.Bc3 dc2 7.Qc2+–) 6.Be2 f6 (6...Qg5 7.Bh8 Qg2 8.Bf3+–) 7.Bh8 Qe7 8.Ngf3 d6 (8...Bc3 9.0–0 Ba1 10.Qa1+–) 9.0–0 Qf8 10.Nd4 (better is 10.Ne4+–) 10...Ne7 11.Bh5 Kd8 12.Bg7! Qg7 13.Qe2 (better is 13.Rb1 Bc5 14.N2b3 Bd4 15.Nd4+–) 13...Bc3= 14.Nf5? (better is 14.N2f3 Bh3 15.Ne6 Be6 16.Qe6 Ba1 17.Ra1=) 14…Bf5–+ (14...Bf5 15.Qf3 Bh3 16.Qh3 Bd2–+) 0–1. Fournier,Frederic (1635) – Guestoulis (1615), Partie evaluee, 2008.

4.Nd2 Nf6

5.c3 Bc5 6.Nb3 Be7–/+ 7.d4 e3 8.fe3 d5 9.Nf3 0–0 10.Qd3 Re8 11.Rd1 Ne4 12.g3 Bf5 13.Nh4?? Bh4–+ 14.Nc5 Ng3! 15.Nb7 Ne4 0–1. Sir_Galahad – mrkt, ChessWorld.net, 2003.

5.Bf6 Qf6–/+ 6.Rb1 Bc3 0–1. yannigator (2080) – kode (2345), net–chess.com, 2008.

3.d3 ed3

4.a3 dc2 5.Qc2 a5 +=.

4.Nd2 de2 5.Qe2 Qe7 6.Ngf3 Qe2 7.Be2 Nf6 8.b5 Be7 9.Nc4 d5 10.Nce5 0–0 11.0–0 Bf5 12.Nd4=+ Bd7 13.a4 Be6 14.c4 dc4 15.Ne6= fe6 16.Bc4 Nd5 17.Bd4 Bf6 18.f4 Be5 19.Be5 Nd7 20.Bc7?? Nc7–+ 21.f5 Ne5 22.Bb3 Rfe8 23.Rae1 Nd3–+ 24.Re3 Nc5 25.Ba2 Kh8 26.Rc3 b6 27.fe6 N7e6 28.Rc4 Rf8 29.Rfc1 Nd3 30.R1c3 Rad8 31.h3 Ndf4 32.Rc2 h6 33.R4c3 Nd4 34.Bb1 Nc2 35.Bc2 Ne2 (35...Ne2 36.Kh2 Nc3–+) 0–1. nay (2100) – ghorn (2185), net–chess.com, 2010.

4.cd3 d5 5.e3 (5.a3!?+=) 5...Bb4-/+ 6.Nd2 Nf6 7.a3 Ba5 8.g3 (8.Ngf3 0–0-/+) 8...Be6 9.Bg2 Nc6 10.Ngf3 Qd7 (10...0–0 11.0–0-/+) 11.Ne5 Ne5 12.Be5 Ke7 (12...Qe7+=) 13.e4 (13.Qc2 Bb6+=) 13...Rad8 (13...de4 14.Bf6 Kf6 15.Be4-/+) 14.ed5 (14.Qc1 b6 15.0–0 (15.Bc7? Rc8 16.e5 Rc7 17.ef6 Kf6–+) 15...Bd2 16.Qd2 de4 17.Bf6 Kf6 18.Be4-/+) 14...Bd5–+ 15.Bd5 Qd5 (15...Nd5?! 16.Bg7 Rhg8 17.Qe2 Qe6 18.Bd4+=) 16.0–0 Qd3 (16...Qe5?! 17.Re1 Qe1 18.Qe1 Kf8 19.Qe3 Bd2 20.Qd2=) 17.Nf3 Rhe8 (17...Qd1 18.Rfd1 c5 19.Rac1–+) 18.Qd3? (better is 18.Qa4!? Bc3 19.Rac1 Be5 20.Ne5-/+) 18...Rd3–+ 19.Kg2 Kf8 (19...c5 20.Rfd1 Red8 21.Rd3 Rd3 22.Ra2–+) 20.Bf4 (20.Bf6 gf6 21.Rfd1 Red8 22.Rd3 Rd3–+) 20...Ng4 (20...Nd5 21.Rfd1 Nf4 22.gf4–+) 21.Rac1 (21.h3 Rf3! 22.Kf3 Nh2 23.Kg2 Nf1 24.Rf1 Bb6–+) 21...c6 (21...Rf3!? 22.Kf3 Nh2 23.Kg2 Nf1 24.Kf1–+) 22.h3 Rf3! 23.Kf3 Nh2 24.Kg2 Nf1 25.Kf1 h6 26.g4 g5 27.Bg3 Rd8 28.f4 Rd3 29.Bh2 Rh3 30.Bg1 gf4 31.Rd1 Ra3 32.Ba7?? Rg3–+ 33.Bc5 Kg7 34.Bd4 Kg6 35.Bf2 Rg4 36.Rd6 Kg7 37.Bd4 Kg8 38.Rh6 f3 39.Rf6 Rd4–+ 40.Rf3 Bc7 41.Rg3 Bg3 42.Kg2 Rd6 43.Kg3 Kf8 44.Kf4 b5 45.Ke5 b4 46.Kd6 b3 47.Kc6 f5 48.Kd5 b2 49.Ke5 b1Q 50.Kd5 f4 51.Kd4 f3 52.Ke3 f2! 53.Kf2 Qb3 54.Ke2 Ke7 55.Kd2 Kd6 56.Ke2 Kd5 0–1. Wu,Ray – Tian,Vincent, Fremont MSJE CC, 2004.

4.ed3 d6 5.Nf3= Nf6 6.Be2 Be7 7.0–0 0–0 8.Re1 Nc6 9.a3 Bg4 10.c4 Bf3 (10...Re8!?+=) 11.Bf3+/- (worse is 11.gf3 d5+=) 11...Rb8 12.Nd2 Ne5 13.d4 (better is 13.Be5 de5 14.Re5+/-) 13...Nd3+= 14.Qc2 Ne1 15.Re1 c5 16.dc5 dc5 17.b5 b6 (17...Re8 18.Ne4-/+) 18.Ne4 Ne4 19.Be4 (worse is 19.Qe4 Bf6 20.Bf6 Qf6-/+) 19...g6 20.Qc3 f5?? (better is 20...f6=) 21.Qg7 1–0. Fournier,Frederic (1715) – pedropere, Active (3/3), 2005.

4.ed3 Qe7 5.Qe2 Qe2 6.Be2 Bb4 7.c3 Bf8 8.Nd2 Nf6 9.Ngf3 Bd6 10.0–0 0–0 11.Rfe1 Bf4 12.g3 Bd2 13.Nd2 d6 14.Bf3 c6 15.Ne4 Ne4 16.Re4 d5 17.Re7 Na6 18.d4 Rb8 19.Re2 (19.Ba3!?+=) 19...Bf5 20.Rae1 Bd3 21.Re3 Bc4 22.a3 (22.a4!?=) 22...Nc7+= 23.Bg4 Ne8 24.f3 Nf6 25.Bf5 g6 26.Bc2 Rfe8 27.Re8 Re8 28.Re8 Ne8 29.Bc1 Kg7 30.Bf4 a6 31.Kf2 Nf6 32.Be5 g5?? (32...h6 33.h4 g5 34.hg5 hg5 35.g4+–) 33.Bf5 (33.g4 h6+/–) 33...b5? (33...b6 34.g4+–) 34.Bd7 (better is 34.g4 b4 35.ab4+–) 34...Kg6+= 35.Bf6 (35.Bc6 h6+=) 35...Kf6= 36.Bc6 Ke6 37.Bb7 a5 38.Bc8 Kd6 39.Bf5 f6?? (better is 39...h5=) 40.Bh7+/– b4? (better is 40...Ke6+/–) 41.cb4+– ab4 42.ab4 Kc6 43.h4 gh4 44.gh4 Kd6 45.h5 Ke7 46.Bg6 Kf8 47.Ke3 Kg7 48.Kf4 (48.Bd3 Bb3+–) 48...Kh6 (48...Bb5 49.Kg4+–) 49.Kf5 Kg7 50.f4 Bb5 51.Ke6 Bc4 52.f5 Bb5 53.Kd5 Bd7 54.b5! Bb5 55.Kc5 Bd7 56.d5 Kf8 57.d6 Kg7 58.Kd5 (58.Kb6 Ba4+–) 58...Kf8 (58...Kh6+–) 59.h6 Kg8 60.Kc5 Kf8 61.Kb6 Ba4 62.Kc7 Kg8 63.d7 Bd7 64.Kd7 Kh8 (64...Kf8 65.Ke6 Kg8 66.Ke7 Kh8 67.Kf6 Kg8 68.Ke7 Kh8 69.f6 Kg8 70.f7 Kh8 71.f8Q) 65.Ke6 (65.Ke7 Kg8 66.Kf6 Kf8 67.Ke6 Kg8 68.Ke7 Kh8 69.f6 Kg8 70.f7 Kh8 71.f8Q) 65...Kg8 66.Kf6 Kh8 67.Ke7 (67.Ke6 Kg8 68.Ke7 Kh8 69.f6 Kg8 70.f7 Kh8 71.f8Q) 67...Kg8 68.f6 Kh8 69.f7 ½–½. Fournier,Frederic (1795) – macrist (1750), Active Owl21.com, 2008.

4.ed3 Nf6 5.a3 a5 6.Nf3 (6.Qe2!? Be7 7.Bf6 gf6 8.b5=) 6...ab4+= 7.ab4 Bb4 8.c3 Ra1 9.Ba1 Be7 10.Be2 0–0 11.0–0 b6 12.c4 Bb7 13.d4 Re8 14.d5 d6 15.Nc3 Bc8 16.Re1 Bf8 17.Nb5 Bg4 18.Bc3 Na6 19.Nfd4 Be2 20.Re2 Re2 21.Qe2 Ne8 22.Nc6 Qd7 23.Qe3 g6 24.h3 Bg7 25.Bg7 Ng7 (25...Kg7 26.Qc3 f6 27.Nbd4=) 26.Qe7 (26.Qa3 Nc5 27.Nc7 Qc7 28.Qa8 Ne8 29.Qe8 Kg7 30.Qe7+/-) 26...Qe8?? (better is 26...Qe7 27.Ne7 Kf8+=) 27.Nc7+– Nc7 28.Qc7 Nf5 29.Qb6 Qe4 30.Qd8?? Kg7= 31.Na5?? Qe1-/+ 32.Kh2 Qf2 33.Qg5 h6 34.Qc1 Nh4 35.Qg1?? Nf3 0–1. Fournier,Frederic (1995) – Susil (1885), Active (5/1), 2005.

4.Qd3 Bb4–/+ 5.c3 (5.Nd2 Nf6–/+) 5...Be7 6.g3 (6.e4 d6–/+) 6...Nf6 7.Qb5 (7.Bg2 Na6–/+) 7...0–0 (7...c6 8.Qd3–+) 8.Qg5 (8.Nf3 c6 9.Qd3 d5–+) 8...d5 9.Nd2 (9.Bg2 Ne4 10.Qc1 Re8–+) 9...Ne4 10.Qe3?? (10.Qh5 Nd2 11.Kd2–+) 10...Bc5 11.Qf4 (11.Qf3 Bf2 12.Kd1 Bb6–+) 11...Nf2 (11...Nf2 12.Nb3 Bb6–+) 0–1. RCB – Wall,Bill, Microsoft Gaming Zone, 1999.

4.cd3 Bb4

5.Bc3 Nc6 6.Nf3 d6 7.Bb4 Nb4 8.a3 Nc6 9.d4 Nf6 10.Nc3 0–0 11.e3 a6 12.Be2 Bf5 13.Nd2 Re8 14.0–0 Qd7 15.Nf3 Re7 16.Re1 Rae8–/+ 17.Bd3 Bg4 18.Be2 a5 19.d5 Bf3–/+ 20.Bf3 Ne5 21.Be2 c6 22.Na4? Nd5–+ 23.e4 Nf6 24.f3 b5 25.Nb2 Rc8 26.Nd3 Qa7 27.Kf1? Nc4 28.Nf4 Ne3 (28...Ne3 29.Kf2 Neg4 30.Kg3 Qf2 31.Kh3 g5 32.Ng6 hg6 33.fg4 Qh4#) 0–1. Acornn (1610) – Bonetti,Shane, ICC, 2002.

5.Nd2 Bd2 6.Qd2+= f6 7.Nf3 Nc6 8.e4 d6 9.Be2 Be6 10.0–0 Qe7 11.d4 Bd7 12.Rfe1 0–0–0 (12...Qe4?? 13.Ba6 Qe7 14.Re7 Nge7 15.Bb7+–) 13.Bd3 Nh6 14.d5 Ne5 15.Ne5 fe5 16.Qa5 Kb8 17.Rab1 b6 18.Qa6 Bc8 19.Qc4 Ng4 20.f3 Nf6 21.a4 Nd7 22.a5 Nc5 23.ab6 cb6 24.Bf1 Qc7 25.Rec1 Ba6 26.Qa6?? (better is 26.Qc2+=) 26...Na6–+ 27.Rc7 (27.Ba6 Qe7–+) 27...Nc7 28.Ba3 g5 29.h3 h5 30.Kf2 Na6?? (better is 30...Kb7–+) 31.Ba6+/– g4 (31...Rh7!?+/–) 32.hg4+– hg4 33.Rc1 (33.fg4 Rh7+–) 33...gf3 34.gf3 Rh2 35.Ke3 Ra2?? (better is 35...Rh6+–) 36.Bd6 Ka8 37.Bc4 Ra3 (37...Rd6 38.Ba2 Rh6+–) 38.Ba3 Rc8 39.Ba6 Rd8 (39...Rg8 40.d6 Rh8 41.d7 Rb8 42.Rc8 b5 43.Rb8 Kb8 44.d8Q) 40.Bd6! Rh8 (40...Rd6 41.Rc8 Mate attack) 41.Be5 (41.Rc7 Rb8 42.Bb7 Rb7 43.Rc8 Rb8 44.Rb8) 41...Rg8 42.Rc7 Rf8 (42...Rb8 43.Bb7! Rb7 44.Rc8 Rb8 45.Rb8) 43.Bb5 (43.Bb7 Kb8 44.Rg7) 43...Rg8 (43...Rf3 44.Kf3 a6 45.Bc6 Kb8 46.Rf7 Kc8 47.Rf8) 44.Bc6 Kb8 45.Rg7 1–0. Fournier,Frederic (1900) – sixtwo (1740), Active, 2005.

5.Nd2 Nf6 6.Rc1 –/+.

5.Nd2 Nf6 6.e3 0–0 7.Ngf3 h6 8.a3 Ba5 9.Be2 d6 10.0–0 Bg4 (10...Nc6 11.Nc4+=) 11.Nc4 Bb6 12.a4 Bc5 (12...Na6 13.Rb1+=) 13.Qb3= Bb6? (better is 13...Nbd7!?=) 14.a5+/– (14.Nb6?! ab6 15.Qc4 Nbd7+=) 14...Bc5 15.Bf6 (15.Qb7 Nbd7+/–) 15...Qf6 16.d4 d5 (better is 16...Nd7!? 17.dc5 Nc5+/–) 17.Nce5+– (17.dc5?! dc4 18.Qb7 Nd7+=) 17...Bf3 18.Bf3 Qd6 (18...Bd6 19.Qb7 Na6+–) 19.Bd5 (19.dc5?! Qe5 20.Qb7 Nd7+/–; 19.Qd5?! Qd5 20.Bd5 c6 21.Bf7 Rf7 22.Nf7 Kf7 23.dc5 Na6+–; worse is 19.Qb7 Na6 20.Rfc1 Rae8+–) 19...c6 (19...Bb4 20.Bb7 Na6 21.Ba8 Ra8 22.Nf7 Qf6 23.Nh6 Kh7+–) 20.Bf7 Rf7 (20...Kh8 21.Ng6 Kh7 22.dc5 Qc5 23.Rac1 Rf7 24.Rc5+–) 21.Qf7 Kh7 22.Qb7 Bd4 (22...Nd7 23.Nd7 Bb4 24.Qa8 Qd7 25.Rfc1+–) 23.ed4 Qd4 24.Rfe1 Nd7 25.Nc6 Rb8 26.Qb8 (better is 26.Nb8 Nf6+–) 26...Nb8 27.Nd4 1–0. Hilbert,Stephan J – Pintor,Manuel, FICGS, 2017.

5.Nd2 Nf6 6.e4 0–0 7.Be2 d6 8.h3 Nc6 9.Ngf3 Bd7 10.0–0 Re8 11.Qb3 Bd2 12.Nd2 b6 13.Nf3 Na5 14.Qc2 c5 15.Rfe1 Bb5 16.e5 de5 17.Ne5 Nc6 18.Nc4? Nd4–+ 19.Bd4 Qd4 20.Bf3 Rad8 21.Rad1 Re1 22.Re1 Qd3 23.Qd3 Rd3 24.Ne5 Rd2 25.Rb1 Ba6 26.Re1?! Ra2 27.Ng4 Bb5 28.Nf6 gf6 29.Re7 Kg7 30.Bd5 Rd2 31.Bf7 Kf8 32.Ra7 Rd7 33.Rd7 Bd7 34.Ba2 Ke7 35.Kf1 Kd6 36.Ke2 Be6 37.Bb1 h6 38.Bg6 c4 39.Kd2 b5 40.Kc3 Kc5 41.g3 b4 42.Kd2 Bh3 0–1. Heat – jeff3530, Live Game Caissa's Web, 2004.

5.Nd2 Nf6 6.Ngf3 0–0 7.a3 Be7–/+.

5.Nd2 Nf6 6.Ngf3 0–0 7.Qb3 Bd2 (7...Na6 8.a3 Be7 9.e3–/+) 8.Nd2 Nc6 9.e3 d5 10.Be2 d4 11.e4 (11.Bf3+=) 11...Na5 (better is 11...a5!?–/+) 12.Qb4= Nc6 13.Qc5 (13.Qb3 Rb8 14.Nf3–/+) 13...Be6 14.Nf3 Bg4 (better is 14...Nd7!? 15.Qc2 Qf6–/+) 15.Nd4= Nd4 16.Bg4 Ng4 17.Bd4 (worse is 17.Qd4 Qd4 18.Bd4 Rfd8–/+) 17...Qh4 (17...Qd7 18.Rd1=) 18.g3 (18.Qc7!? b6 19.Rc1+/–) 18...Qd8 (18...Qh3 19.Qc3 Rfd8 A) worse is 20.Bg7 Qg2 21.0–0–0 Rd6–/+ (21...Nf2 22.Bh6 f6 23.Qf6+/–; 21...Qf2?! 22.Rhf1 Qh2 23.Qb3+=); B) 20.Qb2+=) 19.Qc3 g6?? (better is 19...f6=) 20.h3+– Nh6 21.Bg7 Qg5 22.Bf8 Rf8 23.Qd2 (23.Qc7!? Qb5 24.0–0 Qd3 25.Qb7 Re8+–) 23...Qd2 (23...Qh5 24.Rc1 c6 25.Qb4+–) 24.Kd2 f5 (24...c5 25.a4 Rd8 26.Rhc1+–) 25.Ke3 c5 26.Rab1 b6 27.Rhc1 (27.f4 Rd8+–) 27...Re8 28.Rc4 fe4 29.Re4 Rd8 (29...Nf5 30.Kd2 Rd8 31.Rbe1+–) 30.Re7?? (better is 30.g4+–) 30...Nf5–+ (30...Nf5 31.Kd2 Ne7–+) 0–1. GuestBVDJ – GuestVBDN, freechess.org, 2017.

5.Nd2 Nf6 6.Ngf3 0–0 7.e3 d5 8.Be2 Nc6 9.0–0 Bd6 10.Rc1 Bg4 11.h3 Bh5 (11...Be6 12.Qb3–/+) 12.Nd4 Be2 13.Qe2 Nd4 14.Bd4 c6 15.Rfe1 Bc7 16.Nf3 Re8 (16...Bb6!?–/+) 17.Qb2= Bb6 18.Bb6 (18.Bf6!? Qf6 19.Qf6 gf6 20.d4=) 18...Qb6–/+ 19.Rb1 Qb2 20.Rb2 b6 21.Rc1 c5 22.a4 Red8 23.Ne5 Rd6 24.Rcb1 (24.a5 Re8 25.f4 h6–/+) 24...Nd7 25.Nd7 Rd7 26.a5 ba5 27.Rb8 Rd8 28.R8b5 Rdc8 Black prepares the advance c4 (28...c4 29.Ra5 cd3 30.Rd1–/+) 29.Ra5 h6 30.Rc1 c4 31.dc4 Rc4 (31...dc4 32.Ra4–/+) 32.Rc4 (32.Rca1!?=) 32...dc4–/+ 33.Rc5 a5 34.Rc4 a4 35.Rc2 a3 36.Ra2 Kf8 37.f3 (37.Kf1!?+=) 37...Ke7–/+ 38.Kf1 Kd6 39.Ke1 Kc5 40.Kd1 Kb4 41.Kc2 Rc8 42.Kd2?? (better is 42.Kb1–/+) 42...Kb3–+ 43.Ra1 a2 44.g4 Kb2 45.Ra2 Ka2 46.Kd3 (46.f4 g6–+) 46...Re8 (46...Rc1 47.h4–+) 47.e4 Kb1 48.f4 (48.h4 Rd8 49.Ke3 Kc2–+) 48...Kc1 (48...Ra8 49.e5–+) 49.h4 White intends g5 49...Kd1 50.g5 hg5 (50...Rb8 51.e5–+) 51.hg5 Ke1 52.f5 (52.Ke3–+) 52...Kf2 53.Kd4 Kf3 54.e5 White prepares f6 54...Kf4 55.f6 (55.e6 fe6 56.fe6 Re6–+) 55...g6 0–1. Fournier,Frederic (1950) – fjyg32 (1925), Active, 2004.

4.ed3 Bb4

5.Nc3 Nf6 6.Qe2 Qe7 (6...Be7 7.Ne4 0–0 8.Qf3–/+) 7.Qe7 Be7 8.Nf3 (8.Ne4 Ne4 9.de4 f6–/+) 8...Bb4 (8...0–0 9.Be2–/+) 9.Be2 Nd5 10.Kd2 0–0 11.Nd4 d6 12.a3 Ba5 13.Nb3 Bc3 14.Bc3 Nc3 15.Kc3 Nc6 16.Bf3 (16.Rhe1 Re8+=) 16...Bd7 (16...Ne5 17.Be4–/+) 17.Nd2 Rfe8 18.Kb2 (18.Rab1 Rab8+=) 18...Rab8 19.Rhe1 Nd4 20.Re4 (20.Be4 f5 21.Bd5 Be6 22.Be6 Ne6–/+) 20...c5 (20...Nf3 21.Nf3 Re4 22.de4–/+) 21.Rae1–/+ Re4 22.Re4 (22.Be4 b5–/+) 22...Ba4 23.c3 Nf3 24.Nf3 Bb5 25.c4 Bc6 26.Re7 a5 (26...Kf8 27.Re3–+) 27.Kc3 h6 28.Nh4 b5 (28...g6 29.d4–/+) 29.Nf5 (29.cb5 Rb5 30.Ra7 Bd5+=) 29...d5 (29...b4 30.ab4 ab4 31.Kc2–/+) 30.cd5 (better is 30.Rc7!? d4 31.Kb3 bc4 32.Kc4 Bb5 33.Kc5 Bd3 34.Ne7 Kh7 35.Kd4=) 30...Bd5–/+ 31.Nd6? (better is 31.Re5 b4 32.Kb2 Bg2 33.Rc5 ba3 34.Ka3–/+) 31...b4–+ 32.ab4 ab4 33.Kb2 b3?? (better is 33...Rd8 34.Re8 Re8 35.Ne8 Bg2–+) 34.Re8+= Re8 35.Ne8 Kf8 36.Nc7 Bg2 37.Na6 1–0. kamera – antrobus, GameColony.com, 2002.

5.Nd2 f6 6.Ngf3 b6 7.Be2 Bb7 8.0–0 d6 (8...Ne7 9.c3 Bd6 10.Re1+=) 9.a3 Ba5 10.Nc4 Nc6 11.Re1?? (11.Nd4 Nd4 12.Na5 ba5 13.Bd4 c5+=) 11...Nge7?? (better is 11...Be1 12.Qe1 Nge7–+) 12.Na5+= Na5 13.c4 (13.Nd4!? Kf7 14.Bh5 Ng6 15.f4+=) 13...Qd7 14.Nd4 0–0–0?? (14...0–0 15.Bg4 f5 16.Bh5=) 15.Bf3 (better is 15.Bg4 f5 16.Re7 Qe7 17.Nf5+–) 15...Nec6?? (15...Bf3 16.Qf3 Nec6 17.Bc3=) 16.Nb5 (better is 16.Bg4+–) 16...a6 17.Nc3 Rde8 18.Qd2? (18.Re8 Re8 19.Nd5 Ne5+=) 18...Re1?? (better is 18...Nb3 19.Qf4 Na1 20.Ra1 Ne5 21.Bb7 Kb7 22.Qe4 Kb8–+) 19.Re1+= Re8 20.Re8 Qe8 21.Nd5 Kb8 22.g3 Qe6 23.Bg2 Ne7 24.Ne7 Qe7 25.Bb7 Nb7 26.Qe3? (better is 26.Qc2!?–/+) 26...Qe3–+ 27.fe3 Nc5 28.Kf2?? (better is 28.d4 Ne4 29.Bc1–+) 28...Nd3 29.Kf3 Nb2 30.Ke2 (30.c5 bc5 31.h4 Nc4–+) 30...Nc4 31.Kd3 Na3 32.Kc3 Nb5 33.Kb4 Kb7 34.e4 Kc6 35.Kc4 Na3 36.Kb4 Nc2 37.Kc3 Ne3 38.Kd3 (38.h4 Nf5! 39.g4 Nh4–+) 38...Nf1 39.h4 Ng3 40.Ke3 Ne4! 41.Ke4 g6 42.Ke3 h6 (42...Kd5!? 43.Kd3–+) 43.Kf3 g5 44.Ke3 gh4 (better is 44...Kd5 45.Kd3–+) 45.Kf3 Kc5 46.Kg4 a5 47.Kh4 a4 (47...f5 48.Kh5 Kd4 49.Kh6–+) 48.Kh5 a3 (48...Kd5 49.Kh6 b5 50.Kg6–+) 49.Kh6 a2 50.Kg6 a1Q 0–1. Fournier,Frederic (1865) – pradas, Active, 2005.

5.Nd2 Nf6

6.Qe2 Qe7 7.a3 Bd2 8.Kd2 Qe2 9.Ne2 d6 10.Bf6 gf6 11.Nf4 Be6 12.d4 c6 13.Re1 White gets the initiative 13...Nd7 (better is 13...Kd7!?+=) 14.Ne6 fe6 15.Re6 Kd8 16.Bd3 Kc7 17.Re7 h6 18.Bf5 Rad8 19.Rhe1 d5? (19...c5 20.Kc3 b6 21.Rf7+–) 20.f4 (20.Rf7 Rhf8 21.Rf8 Rf8+–) 20...b6? (20...Rhg8 21.g4 h5 22.gh5 Rh8+–) 21.R1e6+– Rhf8 22.g4 c5?? (22...h5 23.gh5 b5+–) 23.dc5 bc5 (23...h5 24.c6 hg4 25.Rd7 Rd7 26.cd7 Kd7 27.Rf6 Ke8 28.Rf8 Kf8 29.Bg4+–) 24.Ra6 Kb7 25.Rd6 Kb8 (25...Kc7 26.Rdd7 Rd7 27.Rd7 Kb6 28.Rd5+–) 26.Red7 Rd7 27.Rd7 d4 28.c3 (28.Rh7 h5 29.Rh5 a5+–) 28...dc3 29.Kc3 Re8 30.Rh7 Re3 31.Kc4 Rh3 (31...Ra3 32.Rh6 Ra4 33.Kc5 Rf4 34.Rf6+–) 32.Kc5 (32.g5!? Rf3 33.g6 Rf4 34.Kc5 Rf5 35.Kc6 a6+–) 32...Rh2 33.Kc6 a5 34.Kb6 Rb2 35.Ka5 Rb3 36.a4 Rf3 (36...Rf3 37.Rh6 Rf4 38.Rf6 Rd4+–). market (1840) – putje (1915), GameColony.com, 2002.

6.Qe2 Kf8 7.Ngf3 =+.

6.Be2 0–0 7.Ngf3 d5 8.0–0 Nc6 9.a3 Ba5 10.Re1 Re8 11.Bf1 Bg4 12.Re8 Qe8 13.Qe2?? (13.Bf6 gf6 14.Rb1 Bd2 15.Qd2 Bf3 16.gf3 b6+=) 13...Qd7 (better is 13...Qe2 14.Be2 Bd2 15.h3 Bf3 16.Bf3–+) 14.Nb3? (14.Bf6 Re8 15.Qd1 gf6-/+) 14...Bb6 (better is 14...Re8!? 15.Qd1 Re1 16.Ne1 Bd1 17.Rd1 d4–+) 15.Bf6-/+ gf6 16.Re1 Bd4 17.h3 (17.Nbd4 Nd4 Combination; 17.Nfd4 Be2 Pinning (17...Be2 Deflection)) 17...Bh5 (17...Bf3!? 18.Qf3 Be5=) 18.g4+= (worse is 18.Nbd4 Nd4 19.Qe7 Qe7 20.Re7 Bf3 21.gf3 Rc8–+ (21...Nf3?! 22.Kg2 Nh4 23.Kh2+=)) 18...Bc3 19.gh5 Be1 20.Qe1 Re8 21.Qd2 Qh3?? (better is 21...Qd6=) 22.Bh3+– 1–0. Fournier,Frederic (1930) – hermes40 (1885), Active (5/0), 2006.

6.Be2 Nc6 7.Ngf3 0–0 8.0–0 Bd6 9.Re1 b6 10.Bf1 Bb7 11.g3 a5 12.Bg2 a4 13.a3 h5 14.Nc4 Be7 15.Qd2 d5 16.Nce5 Ne5 17.Ne5 h4 18.Rad1 hg3 19.hg3 Bc5 20.d4 Bd6 21.c4 Be5 (better is 21...Rb8+=) 22.de5+/– (worse is 22.Re5 Rb8+=) 22...Ne4 23.Qd4 f5 24.ef6 (24.cd5!? Ra5 25.e6+/–) 24...Nf6+= 25.cd5 Qd6 26.Re6 Qc5 (26...Qd7 27.Qh4+/–) 27.Qc5 bc5 28.Bf6 Rf6 (better is 28...gf6!? 29.Rb1 Rab8+–) 29.Rf6+– gf6 30.Rc1 (30.d6!? c6 31.Rb1 Ba6 32.Bc6 Rd8+–) 30...Ra5 31.Rb1 Ra7 (31...Ba6 32.Rb8 Kg7 33.Ra8+–) 32.Rb5 (32.d6 cd6 33.Bb7 Kg7+–) 32...c4 (32...Kf7 33.Rc5 Ba8 34.Rb5+–) 33.Rc5 (better is 33.d6!? cd6 34.Bb7 c3+–) 33...Ba6 34.Bf1 Kf7 (34...Rb7 35.Bc4 Bc4 36.Rc4+/–) 35.Bc4 (better is 35.Ra5!?+–) 35...Bc4+/– 36.Rc4 Ke7 37.f4 Kd6 38.Rc6 Kd5 39.Rf6 c5 40.Rb6 c4 41.Rb1 c3 42.Rc1 (better is 42.Kf2!?=) 42...Rc7 43.Kf2 (better is 43.g4–/+) 43...Ke4?? (43...Kc4 44.Ke3 Kb3–+) 44.Ke2= Kd4 45.Kd1? (45.g4!? Kc4 46.f5–/+) 45...Rg7 (better is 45...Kd3!? 46.Ke1–+) 46.Kc2 Rg3 47.Rd1 Kc4 48.Rf1?? (48.Rd6 Rg2 49.Kc1–+) 48...Rg2 49.Kc1 (49.Kd1–+) 49...Kb3 50.f5 Ra2 51.Kd1 Ra1 (51...Ra1 52.Ke2 Rf1 53.Kf1 c2–+) 0–1. Fournier,Frederic – Bee73 (1645), Partie evaluee, 2009.

6.Ngf3 0–0 7.Be2 d5 8.0–0 c5 9.Nb3 Qd6 (better is 9...Nbd7-/+) 10.a3+/- c4 11.dc4 Bc5? (better is 11...dc4!? 12.Bc4 Qd1 13.Rad1 Be7+/-) 12.Nc5+– Qc5 1–0. Fournier,Frederic (1700) – cawy93, Active, 2007.

4.ed3 d5

5.a3 Qe7 6.Be2 a5=.

5.Nd2 Bb4?? 6.Bg7+– Bc3 7.Bc3 Nf6 8.Bf6 (8.Qe2!? Be6+–) 8...Qf6 9.Ngf3 Nc6 10.Be2 Bg4 (10...Rg8 11.Rg1+–) 11.0–0 0–0–0 12.h3 (12.Rb1 Rhg8+–) 12...Bd7 (12...Be6 13.Nh2+–) 13.c4 dc4 14.Nc4 (14.dc4?! Rhg8 15.Kh2 Qf4 16.g3 Qh6+–) 14...Rdg8 (14...Rhg8 15.Kh1 Qh6+–) 15.d4 (better is 15.Kh1+–) 15...Bh3+/– 16.Nh4?? (better is 16.Ne3 Qg7 17.Ne1 Nd4 18.Rc1+/–) 16…Qh4–+ (17.Ne3 Rg2 18.Ng2 Rg8 19.Bg4 Rg4–+ (19...Bg4?! 20.Nh4 Bd1 21.Kh2–/+; < 19...Qg4 20.Qg4 Rg4 21.Kh2 Bg2 22.f3 Bf1 23.fg4–+)) 0–1. kamera – Obivankenobi (1735), GameColony.com, 2002.

5.Nd2 Nf6 6.Qe2 Be6 –/+.

5.Nf3 Bb4!? 6.Nbd2 Nf6 –/+.

5.Nf3 Nc6 6.a3= a6 7.Be2 Nf6 8.0–0 Be7 9.Nbd2 0–0 10.Re1 Re8 11.Nd4 Bd7 12.N2f3 b6 13.Nc6 Bc6 14.Rc1 Bb7 15.c4 dc4 16.dc4 Qd1 17.Rcd1 (worse is 17.Red1 Bb4 18.ab4 Re2 19.Bf6 Bf3+=) 17...Nh5 18.Nd4 Nf4 19.Bf3 Bf3 20.Nf3 (worse is 20.gf3 Bf6 21.Ba1 Rad8–/+) 20...Bf8 21.Be5 Ne6 22.Bb2 Red8 23.Ne5 c5 24.bc5 Bc5 25.Nd7 Rac8 26.Nc5 Rd1 (26...Rc5?? 27.Rd8 Nf8 28.Ree8+–) 27.Rd1 Rc5 28.Rc1 1–0. Fournier,Frederic (1960) – daniel51 (1795), Active, 2005.

3.d3 d5

4.de4 Bb4

5.Nd2 d4 6.Ngf3 c5 7.a3 Ba5 8.e3 Nf6 (8...Qb6 9.Rb1 de3 10.Bg7 ed2 11.Nd2 Bd2 12.Kd2 Qa5 13.Ke3 Qa3 14.Rb3+–) 9.Bd3 (9.ed4 Ne4 10.Qe2 Qe7+=) 9...0–0 (9...de3 10.fe3 Nc6 11.0–0=) 10.0–0 (10.ed4!? cd4 11.Bd4+=) 10...Nc6 11.ed4 cd4 12.Nb3 Increasing the pressure on the isolated pawn on d4 12...Bc3 13.Bc3 dc3 14.Qe1 Bg4 15.Qc3 Bf3 16.gf3 Ne5?? (better is 16...Qe7+=) 17.Qe5+– 1–0. Fournier,Frederic – nicolashernan, Active, 2007.

5.Nd2 de4?? 6.Bg7+– e3 7.fe3 1–0. Fournier,Frederic (1880) – Carltum2002, Active, 2007.

4.de4 c6

5.ed5+= Bb4 6.Nd2 Nf6 7.c4 =.

5.ed5+= cd5 6.e3 (better is 6.a3!?+/–) 6...Bb4= 7.Nd2 Nf6 8.Ngf3 0–0 9.Be2 (9.a3 Bd6=) 9...Bg4 (9...Ne4 10.0–0=) 10.0–0 Nc6 11.h3 Bd7 12.Nb3 Bd6 13.c4 dc4? (13...Bf5 14.c5 Be7 15.Nfd4=) 14.Bc4?? (better is 14.Qd6 Ne8 15.Qc5 cb3 16.Ba3+/–) 14...a6?? (14...Qe7 15.Nbd2=) 15.a3 (better is 15.Qd6 Be6 16.Qd8 Rad8 17.Be6 fe6 18.Nc5+–) 15...Bc7 (15...Qe7 16.Qb1=) 16.Nfd4 (better is 16.Bf6!? gf6 17.Nc5+/–) 16...Nd4 17.Nd4 (< 17.ed4 Bc6=+) 17...Ne4 (17...Qe7!? 18.Qf3 b5=) 18.Bd5 Nc5 19.Qc2 (19.Rc1 Bb6+/–) 19...Bb6 (19...Rc8 20.Rac1 Be5 21.Be4 Ne4 22.Qe4=) 20.Nf3 Bh3?? (21.Qc3 Qf6 22.Qf6 gf6 23.gh3 Rfd8+–; 20...Be6 21.Qc3 f6 22.Be6 Ne6+–). b4_player (1910) – mickk (1880), GameColony.com, 2002.

4.de4 de4

5.Qd8 Kd8

6.a3 e3 7.Nf3=.

6.a3 Nf6 7.e3 Nd5 (7...Nbd7 8.Nd2=) 8.Bc4 (8.Nd2 a5 9.ba5 Bf5+/–) 8...Be6+= 9.Nd2 Nc6 (9...c6 10.Ne2+=) 10.Ne4 (better is 10.Nh3+/–) 10...Be7?? (better is 10...Ne3 11.Be6 Nc2 12.Kd1 Na1 13.Bf7 Ke7+=) 11.0–0–0+– Bf6 (11...Ncb4 12.ab4 c6+–) 12.Nf6 gf6 13.Bf6 (13.Bf6 Ke8 14.Bh8 Ne3 15.fe3 Bc4 16.Nf3+–) 1–0. Wall,Bill – Aragon, internet, 2002.

6.Nc3 Nf6 7.Rd1 Bd7=.

6.Nd2 Bb4?? 7.Bg7 e3 8.fe3+– (8.Bh8?! Bd2 9.Kd1 Nh6+/–).

6.Nd2 f5 7.f3 (7.Rd1 Bd7+=) 7...Nf6 (7...Bb4? 8.Bg7 e3 9.c3 (9.Bh8?! Bd2 10.Kd1 Ne7+/–) 9...ed2 10.Kd2+–) 8.fe4 fe4 9.a3 Bf5 10.0–0–0 Ke7 11.e3 (11.h3 a5 12.g4 Bd7=) 11...Nc6 (better is 11...Ng4!? 12.Nh3 a6+= (worse is 12...Ne3 13.Re1 Nf1 14.Rhf1 Bh3 15.gh3+/–)) 12.Ne2+= h6 (12...a5!? 13.b5 Na7+/–) 13.Ng3+/– Bh7 14.Bc4 Ng4 15.Rhf1?? (better is 15.Rde1+/–) 15...Ne3+= 16.Rf7 Kd6?? (better is 16...Ke8 17.Rc7 Nd1 18.Kd1 e3=) 17.Re1 (17.Nde4) 17...Nc4+– 18.Nc4 (18.Nde4 Ke6 19.Ng5 Kd5 20.Rd1 Nd2 21.Rd2 Kc4+–) 18...Ke6 (18...Kd5!? 19.Ne3 Ke6 20.Rc7 Rb8+/–) 19.Rc7+– (worse is 19.Bg7 Kf7 20.Bh8 Bb4 21.ab4 Rh8+=) 19...Bd6? (19...Kd5 20.Ne3 Ke6 21.Rb7+–) 20.Rb7 (better is 20.Nd6 Kd6 21.Rb7+–) 20...Bg3 21.hg3 Rhc8? (21...Rhg8+–) 22.Rg7 (22.Bg7?! Nd8 23.Na5 Nb7 24.Nb7 h5=) 22...Bf5 (22...Nb4 23.ab4 Rc4+–) 23.g4 Bg4 24.Rg4 Nb4 (24...Rg8 25.Rge4 Kd7 26.b5+–) 25.ab4 (better is 25.Ree4 Kd7 26.Rg7 Kc6 27.Rg6 Kb5 28.Nd6 Ka6 29.Nc8 Nc6 30.Rc6 Kb7 31.Na7 Ra7 32.Rh6 Kc8 33.Rh8 Kd7 34.Rh7 Kd6 35.Ra7 Kd5 36.Re5 Kc6 37.c4 Kd6 38.g4 Kc6 39.Re6 Kc5 40.Rc7) 25...Rc4 26.Rge4 Re4 27.Re4 Kd5 (27...Kf5 28.Re5 Kf4 29.Bd4+–) 28.Re5 (better is 28.Rh4 Rc8+–) 28...Kc4 29.c3 Rg8 30.Re2 h5 31.Kc2 h4 (31...Rg3 32.Rf2+–) 32.Bc1 Rg4 (32...Kb5 33.Re5 Kc6 34.Rg5+–) 33.Be3 (better is 33.Re5 Rg2 34.Bd2 Rd2 35.Kd2 Kb3+–) 33...Re4 34.Kd2 a6 35.Bd4 (better is 35.Rf2!? Rg4+–) 35...Rg4 36.Ke3 Rg3 (36...Kd5 37.Kf2+–) 37.Kf4 Rg8 38.Rf2 (38.Ra2 Rg6+–) 38...Kd3 (38...Rf8 39.Ke3 Re8 40.Kf3+–) 39.Ra2 Rg6 40.Ra5 (40.Kf5 Rg8+–) 40...Kc4 (40...Ke2 41.Re5 Kf1 42.Rh5+–) 41.Rg5 Rh6 42.Kg4 Re6 (42...Kb3 43.Kh3+–) 43.Kh4 Re4 44.g4 Rd4 (44...Re6+–) 45.cd4 Kb4 46.d5 (46.Rc5 Ka4 47.g5 Ka3 48.g6 Kb3 49.g7 Ka2 50.g8Q Ka3 51.Rc3 Kb4 52.Qb3 Ka5 53.Rc5) 46...a5 47.d6 a4 (47...Kb3 48.d7 Kb2 49.Rc5 Kb3 50.d8Q a4 51.Qd3 Kb2 52.Rc2 Ka1 53.Qd1) 48.d7 1–0. Fournier,Frederic (1820) – Paola1 (1820), Active, 2004.

6.f3 Nf6 7.fe4 Ne4 (7...Bb4 8.Nc3–/+) 8.Nf3? (better is 8.Nc3!? Nc3 9.Bc3=) 8...Bb4–/+ 9.c3 Ba5 10.e3 Bg4 11.Be2 Bf3 (11...Re8!?–+) 12.gf3–/+ f5?? (better is 12...Nd6–/+) 13.fe4+– fe4 14.0–0 (14.Nd2 Bb6+–) 14...Nc6 (better is 14...Bb6!? 15.Kf2 Rf8 16.Ke1 Rf1 17.Bf1 Be3+/–) 15.Nd2 Ne5 (15...Bb6 16.Nc4+–) 16.Ne4 Kd7 (16...Bb6 17.Rad1 Kc8 18.c4 Be3 19.Kg2+–) 17.c4 c6 (17...Rae8 18.Rf5 Nc6 19.Bg7 Rhg8 20.Rf7 Kc8 21.Bg4 Kb8+–) 18.Be5 Rae8 (18...Ke7 19.Bh5 Bb6 20.Rf7 Ke6 21.Bg3 Be3 22.Kg2 g6 23.Nd6 gh5 24.Re1 Rhg8 25.Re3) 19.Nc5 (19.Rad1 Ke7 20.Bd6 Kd8 21.Bg3 Bd2 22.Rd2 Ke7 23.Bh4 g5 24.Bg5 Ke6 25.Nc5 Ke5 26.Bf6) 19...Kc8 (19...Ke7 20.Nb7 Bb4 21.c5+–) 20.Bd4 (20.Bg4 Re6 21.Be6 Kd8 22.Rad1 Bd2 23.Rd2 Ke8 24.Bf7 Ke7 25.Rd7 Kf8 26.Ne6) 20...Bb6 (20...Re7 21.Bg4 Kb8 22.Rab1+–) 21.Nb3 (21.Bg4 Kb8 22.Nd7 Ka8 23.Nb6 ab6+–) 21...Rhg8 (21...Bd4 22.Bg4 Kb8 23.ed4+–) 22.Bb6 (better is 22.c5!? Bd8 23.Bc4 Rgf8+–) 22...ab6 23.Rf3 g5 24.Raf1 g4 (24...h5 25.Rg3 h4 26.Bg4 Kc7 27.Rf7 Kb8 28.Rh3+–) 25.Rf7 (better is 25.Rg3!? h5 26.Rf5 h4 27.Rg4 Rg4 28.Bg4 Kd8+–) 25...h5 26.Rh7 g3 (26...Re3 27.Rff7 c5 28.Bf1+–) 27.hg3 (27.Bh5!? Re3 28.Rff7 gh2 29.Kh2 Re4+–) 27...Rg3 28.Kh2 Reg8 (28...Rge3 29.Bh5 R8e7 30.Bg4 Kc7 31.Rff7 Rf7 32.Rf7 Kb8 33.c5+–) 29.Bh5 Rg2 30.Kh3 R2g3 31.Kh4 Re3 (31...Rg2 32.Rh1+–) 32.Rff7 (better is 32.Bg4!? Kb8 33.Rff7 Ka8 34.Rb7 Rg4 35.Kg4 Re4 36.Kg5 Re5 37.Kf6 Rh5+–) 32...Re4 33.Kh3 Rc4 34.Rb7 (better is 34.Bg6 Ra4+–) 34...b5 (34...Rc3 35.Kh2 Rc2 36.Kh1 Rc3+–) 35.Ra7 Rg1 (35...Rc3 36.Kh2 Rc2 37.Kh1 Kb8+–) 36.Ra8 1–0. Fournier,Frederic (1755) – Khodiloshadiu (1615), Active, 2005.

3.d3 f5

4.de4 fe4 5.f3 e3 6.a3=+ Qg5 7.Qd4 Nc6 8.Qe4 Be7 9.Nh3 Qh6 10.Qg4 Qd6?? 11.Bg7+/– Nf6 12.Qf4 Nd4 13.Ra2 Rg8 14.Bf6 Qf4 15.Nf4 Bf6 16.Nd5 Be5 17.Ne3 d6 18.Nd5 Be6? 19.Nc7+– Kd7 20.Na8?? Ba2–/+ 21.Nc3 Ra8?? 22.Kd2?? Rc8–+ 23.e3 Nf3! 24.gf3 Rc3 25.Bb5 Kc7 26.a4 Ra3 27.a5 Bc3 28.Ke2 d5 29.Rg1 Bc4?? 30.Bc4=+ dc4 31.Rg4 Ra2?? 32.Rc4+– Kd6 33.Rc3 b6 34.ab6 ab6 35.f4 Rb2 36.Rc4 b5 (36...b5 37.Rd4 Ke7+–). markmooney – Barry49434, ChessWorld.net, 2005.

4.a3 d5

5.de4 fe4 6.c4 c6 7.cd5 cd5 8.Nc3 Nf6 9.Rc1 Nc6 10.e3 Bd6 (10...Be7!?=) 11.Nd5+/– Bg4?? (better is 11...Nd5 12.Bg7 Rf8+=) 12.Nf6 gf6 (12...Qf6 13.Bf6 (13.Qg4?! Qb2 14.Qe4 Be7 15.Rc6 Qa1 16.Ke2 Rd8+=) 13...Bd1 14.Bg7+– (14.Kd1?! gf6 15.Bb5 0–0–0+/–)) 13.Qg4 Be7 (13...Qe7 14.Bb5 Kd8 15.Bc6 bc6 16.Ne2+–) 14.Qe4 Qd7 15.Bb5 0–0–0 (15...Rd8 16.Nf3+–) 16.Nf3 Rhg8 (16...Rhe8 17.Bc6 bc6 18.Rc6 Kb8 19.0–0+–) 17.Nd4 Bd6 (17...f5 A) 18.Nc6 Qd2 (18...fe4?? 19.Ne7 Kb8 20.Bd7 Rg2 21.Bf5+–) 19.Kf1 fe4 20.Ne7 Kb8 21.Ng8 Qb2–/+; B) < 18.Qf5 Qf5 19.Nf5 Rd7+–; C) 18.Qc2 Rg6 19.Bd3+–) 18.Nc6 bc6 19.Bc6 Qe7 20.Qf5 Kb8 21.Qb5 Kc8 22.Bd7 1–0. market (1945) – Stone100 (1610), GameColony.com, 2002.

5.de4 fe4 6.e3 Be6 (6...Nf6 7.c4=) 7.Be2 (7.c4 dc4 8.Qd8 Kd8+=) 7...Nf6 (7...Qg5 8.Bf1+=) 8.h3 (8.c4!?=) 8...Nbd7+= 9.f3 (9.g4 h6+=) 9...Bd6–/+ 10.fe4? (better is 10.Nc3–/+) 10...Bg3–+ 11.Kf1 (11.Kd2 Ne4 12.Kc1 Nf2–+) 11...0–0 12.ed5 (12.Nf3 de4 13.Kg1 ef3 14.Bf3–+) 12...Nd5 13.Bf3 (13.Nf3 Ne3 14.Kg1 Nd1 15.Bd1 Rf3 16.gf3 Qg5 17.Kf1 Qe3 18.Bd4 Qd4 19.Rh2 Bh3 20.Rh3 Qf2) 13...Ne3 (13...Ne3 14.Ke2 Nd1 15.Kd1 Nc5 16.Nd2 Ne4–+) 0–1. Stempa,Henryk – Olej,Emil, corr Poland, 1961.

4.a3 Nf6

5.e3 a5 6.b5 d5=.

5.e3 Nc6 6.Nd2 ed3 (6...d5!?=) 7.Bd3+= d6 8.Qf3 Bd7 (8...g6!?+=) 9.Bf5+/– Bf5 10.Qf5 Be7 11.b5 Ne5 12.Be5 de5 13.Qe5 0–0 14.Ngf3 Re8 (14...Qd7 15.Nd4+–) 15.Qe6 Kh8 16.Ne5 Qd5 17.Qd5 Nd5 18.Nd3 Nc3 19.a4 Rad8 (19...a6 20.ba6 Ra6 21.a5+/–) 20.0–0 Ne2 21.Kh1 Bf6 (22.Ra3 Nc3+–). kamera – NN, GameColony.com, 2002.

5.de4 fe4 6.e3 d5 (6...Be7 7.Nd2=) 7.c4 c6 8.cd5 cd5 (worse is 8...Nd5 9.Qh5 Kd7 10.Qg4 Ke8 11.Qe4 Ne7 12.Bc4+/–; worse is 8...Qd5 9.Qd5 cd5 10.Bf6 gf6 11.Nc3+/–) 9.Bb5 (9.Ne2 Be7=) 9...Nc6 10.Ne2 Bd6 11.0–0 0–0 (11...Bh2 12.Kh2 Ng4 13.Kg1 Qh4+/–) 12.Bf6+/– Qf6 13.Qd5 Kh8 (13...Be6 14.Qe4 Bf5 15.Qd5 Be6 16.Qd6+=) 14.Nbc3+/– (14.Bc6 bc6 15.Qd2 Bh2 16.Kh2 Qa1–/+) 14...Bf5 15.f4 (15.Bc6 bc6 16.Qa5 Be5+/–) 15...Rad8 (better is 15...ef3!? 16.Qf3 Qh6=) 16.Ne4+/– Ne7?? (better is 16...Qe7 17.Nd6 Rd6+/–) 17.Nf6+– Nd5 18.Nd5 Be4 (18...a6 19.Bc4+–) 19.Nec3 Bd5 20.Nd5 Rf5 (20...g5 21.Bc4+–) 21.e4 Rf4 (21...Rff8+–) 22.Nf4 Bf4 23.Rf4 h6 24.Raf1 Kh7 25.Rf7 (better is 25.Rf8 Rd2 26.e5 Rd5+–) 25...Rd4 26.Rb7 (better is 26.e5 a6 27.Ba4+–) 26...Re4 27.Bd3 Kh8 (27...h5 28.Be4 Kh6 29.h4 g6 30.Rf8 g5 31.Rh7) 28.Be4 a5 1–0. pozarski (2030) – McShane, GameColony.com, 2002.

3.e3 Bb4??

4.c4?? f6 5.Qh5 g6 6.Qd5 Qe7 7.f3 ef3 8.Qf3 d6 9.Be2 Bf5?? (better is 9...Nc6–/+) 10.Qb7+– Bd2?? (10...Be4 11.Qb4 a5 12.Qa4 Bc6 13.Qb3+–) 11.Kd2 (better is 11.Nd2 Qe3 12.Qa8+–) 11...Be4 12.Qc8 Kf7 13.Bf3 Nd7 14.Qa6 (14.Qc7 Rb8 15.Be4 Rb2 16.Bc2 Ne5 17.Qe7 Ne7+–) 14...Bf3 15.Nf3 Nc5 16.Qc6 Nh6 17.Qd5 Kg7 18.Nc3 Nf5 19.Nd1 (19.e4!? Nh6+–) 19...Ne4 20.Ke1 Rhc8 21.Nd2 Nd2 22.Qd2 Rab8 23.Rf1 Qf7?? 24.Qe2 Re8 25.g4 Rb2 26.Qb2 Ne3 27.Ne3 Re3 28.Kd1?? Re5? 29.Qc3 d5? 30.Qe5! dc4 31.Qc3 Qd5 32.Qd2 Qe5 33.Rc1 Qb5 34.Re1 Qa4 35.Rc2 g5 36.Re7 Kg6 37.Qd5 Qc2 38.Ke1 Qc3 39.Qd2 Qf3 40.Qc2 f5 41.Qf5 Qf5 42.gf5 Kf6 43.Rc7 Kf5 44.Rc4 h5 45.Kf2 g4 46.Kg3 Ke5 47.h3 h4 48.Kh4 gh3 49.Kh3 Kd5 50.Rc1 a5 51.Kg3 Ke4 52.Kf2 Kd3 53.Ke1 a4 54.Kd1 a3 55.Rc2 Ke3 56.Rd2 1–0. valpa – pytolo98, playchess.de, 2003.

4.Bc4 d5 5.Bb3 Nf6 6.Ne2–/+ Bg4 7.h3 Bh5 8.0–0 0–0–/+ 9.Ba3 a5 10.Bb4 ab4 11.c3 Na6 12.Qe1 c5 13.Nf4 c4 14.Bc2 bc3 15.Nc3–/+ Nc5 16.Nh5 Nh5–+ 17.Bd1 Nd3 18.Qe2 Nf6 19.Bc2 Nd7 20.Nd5–/+ (20.Nd5 N7e5 21.Nc3–/+). Steve20 – willow27, ChessWorld.net, 2007.

4.Qg4 Nf6?? 5.Qg7+– Rg8 6.Qf6 Be7 7.Qh6 Bf8 8.Qh7 Qg5 9.Qe4 Be7 10.Nf3 Qc5 11.d4 Qb6 12.Ba3 Qa5 13.c3 d6 14.Bc4 Nd7 15.0–0 Nf6 16.Bb4 Qh5 17.h4?? Ne4–+ (17...Ne4 18.Nbd2 Bh3–+) 0–1. yannigator (1915) – tundeski (1955), net–chess.com, 2010.

4.Qg4?? g6?? 5.Qe4+– Be7 6.Bh8 f6 7.Bc4 f5 8.Qe5 Nc6 9.Qg7 d5 10.Qg8 Bf8 11.Bd5 Qe7 12.Bc6 bc6 13.Nf3 Be6 14.Bf6 Qf6 15.Qh7 Qa1 16.0–0 Qf6 17.Qc7+– Bd5 18.Nd4 Bd6 19.Qh7 0–0–0 20.Qa7 Bb8 21.Qa6 Kd7 22.Nc3 Qe5 23.f4 Qc7 24.Rb1 c5 25.Nd5 Qd6 26.Rb7 Ke8 27.Nf6 Kf8 28.Ne6 Qe6 29.Qe6 Bd6 30.Qf7 1–0. IrishBouncer – Goof, ChessWorld.net, 2005.

4.Bg7+– Nh6 5.Bh8 f6 6.Qh5 Nf7 7.Qh7 d5 8.Be2 d4 9.Bh5 Be6 10.Bf7 Bf7 11.Nh3 Qe7 12.Qh6 Nc6 13.Nf4 Kd7 14.Bf6 Qd6 15.a3 Ba5 16.Qg7 Rf8 17.Ng6 de3 18.Nf8 Ke8 19.fe3 Qf8 20.Qg4 Qh6 21.Qc8 (21.Qc8 Nd8 22.Qd8) 1–0. tonycally – breaker, ChessWorld.net, 2004.

4.Bc4 Nf6

5.Ne2 0–0 6.0–0 d5 7.Bb3 Bg4 8.h3 Be6 9.d3 Nc6 10.a3 Bd6 11.Nd2 d4 (better is 11...Qe7–/+) 12.Nd4+= Nd4 13.Bd4 Bb3 14.Nb3 c5 (14...c6 15.de4 Ne4 16.Bg7 Kg7 17.Qg4 Ng5 18.h4+=) 15.Bc5 b6 16.Bd6 Qd6 17.Qe2 ed3 18.cd3 Rfe8 19.a4 Rac8 20.d4 Nd5 21.Rac1 Nc3 22.Qd3 Na4?? (22...Qb4 23.Nd2 Na4 24.Rc8 Rc8+=) 23.Qa6 (better is 23.Qb5 Nb2 24.Nd2+–) 23...Nb2?? (better is 23...Qd7=) 24.Rc8+– (24.Rc8 Rc8 25.Qc8 Qf8 26.Qa6+–) 1–0. croach (2360) – nando (2115), net–chess.com, 2015.

5.Ne2 d5 6.Bb3 0–0 7.0–0 Bg4 8.Qe1 c5 9.a3 Ba5 10.Nbc3 c4–+ 11.Ba2 a6 12.Ng3 b5–+ 13.h3 Be6 14.Qe2 Nbd7 15.Rad1 (15.Rad1 Qe7 16.Ra1–+; 15.d3 Nc5 16.dc4 bc4–+). kehrsam – willow27, ChessWorld.net, 2007.

4.Bg7 Nc6

5.a3 Be7 6.Bh8 Bf6 7.Bf6 Nf6 8.Nc3 d5 9.d3 (9.Bb5 Bd7+–) 9...Bg4 (9...Qe7 10.de4 de4 11.Bb5+–) 10.Be2 Qd7 (10...Be2 11.Nge2 Qe7 12.Qd2+–) 11.Bg4 Ng4 12.de4 0–0–0 (12...de4 13.Ne4 0–0–0 14.Qd7 Rd7 15.h3+–) 13.ed5 Nce5 (13...h5 14.Rb1+–) 14.Qd4 a6 (14...Qf5 15.e4 Qf6 16.Nge2+–) 15.f3 Qf5 (15...Re8 16.Qa7 Qf5 17.fg4 Ng4 18.e4+–) 16.fg4 Ng4 (16...Qc2 17.Ra2 Qc1 18.Ke2+–) 17.Nf3 Re8 (17...h5 18.e4 Qf4 19.0–0+–) 18.0–0 Kd8 (18...h5 19.h3 Ne5 20.Qa7+–) 19.e4 Qf4 20.Rae1 b6 (20...h5 21.Qa7 Qd6 22.e5 Qb6 23.Qb6 cb6 24.Ng5+–) 21.e5 Qf5 22.e6! Nh6 (22...Qe6 23.de6 Discovered attack) 23.e7! Re7 Deflection from h8. 24.Qh8 Kd7 Plans Ng8 25.Re7 Ke7 White now must not overlook the idea f6 26.Re1 Kd6 (26...Qe6 27.de6 fe6 28.Ng5 Ng8 29.Qg7 Kd6 30.Re6 Kc5 31.Qc7 Kd4 32.Nf3) 27.Qd8 Qd7 28.Qf8 1–0. pierre – el_gordo, ChessWorld.net, 2005.

5.c3 Bc5 6.Bh8 d5 7.Be2 a6 8.Bg4 Nf6 9.Bf6 Qf6 10.Bc8 Rc8 11.Qg4 Rd8 12.Ne2 Ne5+/– 13.Qg8 Ke7 14.Qg3 Nd3 15.Kf1 Rg8 16.Qc7 Ke6 17.Nf4 Nf4 18.Qf4 Ke7 19.Qc7 Ke6 20.g3 (20.g3 Qf3 21.d4=; better is 20.Qc5 Qe5 21.Qb6 Qd6 22.Qb7+–) 1–0. pinecrest1981 – pitt2005, Live Game Caissa's Web, 2006.

5.Bh8 d5+–.

5.Bh8 Qe7 6.Qg4 Nf6 7.Qg5 d5 8.Qf6 Qf8 9.Bg7 Qg8 10.Bb5 Bd7 11.Bc6 Bc6 12.Ne2 Kd7 13.Qf5 Kd6 14.Be5 Kc5 15.0–0 Kb6 16.a4 a5 17.Nbc3 Re8 18.Bd4 Ka6 19.Nd5 Bd5 20.Qd5 b6 21.Qb5 Kb7 22.Nc3 Bd6 23.g3 Qg6 24.Qd5 c6 25.Qb3 c5 26.Nb5 Bb8 27.Qd5 Kc8 28.Qc6 Qc6= 29.Bc3 h5 30.h4 Rg8 31.Kg2 Qe6 32.f4? Qg4 33.Rf2 Qg3 34.Kf1 Qh4 35.Ke2 Qg4 36.Ke1 h4 37.d4 h3 38.Kd2 Qg3 39.Raf1 cd4 40.Bd4 h2 41.Rh2 Qh2 42.Kc3 Rg2 43.Rc1 Qh6 0–1. bratek55 (1630) – aconeni (1605), kurnik, 2011.

4.Bg7 d5

5.a3 Ba5 6.Bh8 Nf6 7.Nc3 Bc3 8.dc3 Bg4 9.Be2 Be2 10.Ne2 (< 10.Ke2 Nbd7+–) 10...Nc6 (10...c6 11.c4+–) 11.Nf4 Qd6 12.Bf6 Qf6 13.Rb1 (better is 13.Nd5 Qe5 14.Qg4+–) 13...Qc3 14.Qd2 Qe5 (14...Qd2 15.Kd2 0–0–0 16.Kc3+–) 15.0–0 0–0–0 16.Rb2 (better is 16.Rb5 Ne7 17.c4+–) 16...Qb2=+ 17.h3 (17.Nd5!? Qa3 18.c4=+) 17...Qa3 18.Nh5 (18.Nd5 Qc5 19.Rd1 Rd6–+) 18...Qe7 19.Ng7?? (better is 19.Nf4–+) 19...Qe5 20.f4 Qg7 21.f5 d4 22.f6 Qg5 23.Rf4 de3 24.Qe3 Rd1 25.Kh2 Rf1 (better is 25...Re1 26.h4 Qh4 27.Rh4 Re3 28.Rh7 Ne5–+) 26.Qe4 (26.Re4 Qe3 27.Re3 Rf6 28.Kg1–+) 26...Rf4 (26...Qf4 27.Qf4 Rf4 28.g4–+) 27.Qe8 (27.Qh7 Rf6 28.Qd3 Rf2–+) 27...Nd8 28.Qe7 Rf6 29.Qe4 Rf2 0–1. galaxy5 – Jilla, Live Game Caissa's Web, 2004.

5.Bh8 Nc6 6.Bb2 Nf6 7.Bb5 Bd7 8.Ne2 Qe7 9.0–0 0–0–0 10.Nf4 Bd6 11.Bf6 (11.Bc6!? Bc6 12.Bd4 Rg8+–) 11...Qf6 12.Nc3 Bf4 13.ef4 Qf4 14.Nd5 Qe5 (14...Qg5 15.Bc6 Bc6+–) 15.Ne3 (better is 15.Bc6 Bc6 16.Ne3+–) 15...Qb5 16.Rb1 Qg5 17.c3 Ne5 18.Qb3 (18.d4 Bc6+–) 18...b6 (better is 18...Bc6 19.Kh1 Qf4=) 19.Qa3?? (better is 19.Kh1 Qf4 20.Qa3+/–) 19...Kb8 (better is 19...Nf3 20.Kh1 Nd2 21.Qa7 Qa5 22.Qa5 ba5=+) 20.Rb4?? (better is 20.Kh1+/–). Familyfork – dannyb, Live Game Caissa's Web, 2004.

5.Bh8 Nc6 6.Bb5 Nf6 7.Bf6 Qf6 8.c3 Ba5 9.Ne2 d4 10.Nd4 Bd7 11.Nc6 Bc6 12.Bc4 0–0–0 13.0–0 Rg8 14.Kh1 Qg5 15.Rg1 Rg7 16.Be2 Bd7 17.f3 c6 18.fe4 Bc7 19.h3 Qg3 (19...Qg3 20.e5 Be5 21.Rf1 Qg2#) 0–1. TriAngel – Slim_Jim, ICC, 1999.

5.Bh8 Nc6 6.f3 (6.Nc3 Be6+–) 6...Nge7 (6...Bd6 7.f4+–) 7.Bf6 Qd6 8.Be7 (8.Bb2!? Nf5 9.Nc3 Bc3 10.Bc3 Qh6 11.fe4 Ng3 12.hg3 Qh1 13.ed5 Ne7+–) 8...Qe7 9.fe4 (9.Bb5 Bd7+–) 9...de4 (9...Qh4 10.g3 Qe4+–) 10.Qh5 Bf5 (10...Qf6 11.c3 Bf5+–) 11.Qf5 Bd6 (11...Qe5 12.Qe5 Ne5 13.Ne2+–) 12.Bb5 (better is 12.Qh7 Be5 13.Qg8 Qf8 14.Qf8 Kf8+–) 12...a6 (12...Qe5 13.Qe5 Be5 14.Nc3 Bc3 15.dc3+–) 13.Bc6 bc6 14.Qh7 (14.Nc3 h6+–) 14...0–0–0 (14...Be5 15.c3 0–0–0 16.Nh3+–) 15.Qf5 Kb8 (15...Qe6 16.Qe6 fe6 17.Nc3+–) 16.Nc3 Be5 17.Rb1 Ka7 18.Qe4 Qd6 19.d4 (19.Nf3 Bc3 20.dc3 f6+–) 19...Bf6 20.Nge2 c5 21.Qb7 1–0. Nautiluschess – Sulu, ICS blitz, 2001.

5.Bh8 Be6 6.Bc3 Bc3 7.Nc3 Nc6 8.Bb5 Qg5 9.Bc6 bc6 10.Nge2 Nf6 11.Ng3 h5 12.Qe2 h4 13.Qa6 hg3 14.Qc6 Ke7 15.Qa8 gf2 16.Kf1 Ng4 17.Qa7 Qh4 18.Qc7 Kf6 19.Qd8 (19.Qd8 Kg6 20.Qh4+–) 1–0. guest476 – guest409, ICC, 2002.

5.Bh8 Be6 6.Bc3 c5 7.Bb4 cb4 8.Bb5 Bd7 9.Bd7 Nd7 10.c3 Qf6 11.f3 Qe7 12.Ne2 ef3 13.gf3 Qh4 14.Ng3 Qf6 15.0–0 Ne7 16.Qc2 0–0–0 17.cb4 Kb8 18.d4 Rg8 19.Qh7 Qe6 20.Qd3 Nf5 21.Kf2 Nh6 22.Qe2 f5 23.Nd2 Qf6 24.Rg1 f4 25.Nh5 Qh4 26.Ng3 fg3?? 27.Kf1 gh2?? 28.Rh1?? Qh3–+ 29.Kf2 Qg2 (29...Qg2 30.Ke1 Qh1 31.Nf1 Qg2 32.Nh2 Qg1 33.Nf1 Rg2–+; 29...Qg3 30.Kf1 Qg1 31.Rg1 hg1Q#) 0–1. tanto – jrowe, net–chess.com, 2000.

5.Bh8 Ne7 6.Bb5 (6.Nc3 Bf5+–) 6...c6 7.Be2 Qd6 (7...Bd6 8.d3+–) 8.f3 (8.h3 Qg6 9.g4 Bd6+–) 8...Qg6 (8...Nf5 9.c3 Bc5 10.Nh3+–) 9.Kf2 (9.g3 Nf5 10.c3 Be7+–) 9...ef3 (9...Bf5 10.f4+–) 10.Nf3 (10.Kf3?? Qf5 11.Kg3 Bd6 12.Be5 Be5 13.Kh4 Ng6) 10...Bf5 11.Nh4 Nd7 (11...Bc2 12.Ng6 Bd1 13.Ne7 Be2 14.Nd5 cd5 15.Ke2 Nc6+–) 12.Ng6 (12.Ng6 hg6 13.Bd4+–) 1–0. Trkn – jorgempf, itsyourturn.com, 2000.

5.Bh8 f6 6.Qh5 Kd7 7.Qg4 (better is 7.Qd5 Bd6 8.Qe4 c6+–) 7...Ke7 (7...Kc6 8.Qh4+–) 8.Qg7 Kd6 9.Qh7 Be6 (9...Kc6 10.Ne2+–) 10.Qh4 (10.a3 Qe7 11.Bg7 Bc5+–) 10...Nc6 (10...Kd7 11.Ne2 Kc8 12.Nf4+–) 11.Bg7 (11.a3!? Ba5 12.Ne2 Qf8+–) 11...Ne5 (11...Kd7 12.Ne2+–) 12.Bh6 (better is 12.f3 Qd7 13.Bh8 Bf5+–) 12...Nh6 13.Qh6 Ng4 14.Qf4 (14.Qh3 Kd7+–) 14...Ke7 15.Ne2 Bd6+= 16.Qd6 Qd6= 17.Nbc3 Qe5 18.h3 Rh8 19.f4 Qd6 20.Rg1 Nh2 21.0–0–0 Qa3 22.Kb1=+ Kd7 23.Nd4 Bf7 24.Bb5 Kc8 25.Rh1 c6 26.Be2+– Qb4 27.Ka1 c5 28.Rb1 Qa5 29.Nb3 Qa3 30.Rh2 d4 31.Ne4 c4 32.Nd4 c3 33.Nc3 b6 34.Ndb5 Qa5 35.Nd6 Kb8 36.Nf7 Rh7 37.Nd6 Rd7 38.Nde4 Qf5 39.Bg4 Qh7 1–0. annmarie – CharSupreme, Live Game Caissa's Web, 2004.

5.Bh8 f6 6.Qh5 Ke7 7.Qh7 Kd6 8.Ne2 Be6 9.Nbc3 Nd7 (9...a6+–) 10.Nb5 Kc5 11.Ned4 Bg4 12.h3 Ne7 (12...Qe7 13.hg4 c6 14.Nc7+–) 13.a3 Ba5 14.hg4 Qh8 15.Qe7 Kb6 16.Nd6 Qd8 (16...a6 17.Rb1 Bb4 18.Rb4 Ka7 19.Rb7) 17.Rb1 Kc5 (17...Bb4 18.Rb4 Ka5 19.Nb7) 18.Nb7 1–0. marekt – alielzarka, internet, 2014.

5.Bh8 f6 6.Qh5 Kf8 7.Qh7 (better is 7.c3 Bd6+–) 7...Ne7 (7...Qe7 8.Qe7 Ke7 9.h4+–) 8.Bf6 Nbc6 (8...Ke8 9.f3+–) 9.Qg7 (9.a3 Bc5 10.d4 ed3 11.Bd3 Qd6 12.Qg7 Ke8+–) 9...Ke8 10.Bb5 (better is 10.h4 Bd6+–) 10...Qd6 (10...Be6 11.Ne2+–) 11.Be7 (better is 11.a3 Bc5 12.Be7 Qe7 13.Qg8 Qf8 14.Qd5+–) 11...Qc5 (11...Qe7 12.Qg8 Qf8 13.Qd5 Bd7+–) 12.Bc5 (better is 12.Qf8! Kd7 13.Bc5 Bc5 14.Qc5 Kd8 15.Qd5 Bd7+–) 12...Bc5 13.Bc6 bc6 14.Nc3 (better is 14.Qc3 Rb8 15.Qc5 Rb6+–) 14...Rb8 15.Nge2 (better is 15.Qc7 Bd6 16.Qc6 Ke7 17.Nd5 Ke6+–) 15...Rb2 16.Qc7 (16.Ne4 de4 17.Qb2 Kf7+–) 16...Bd7 17.Qe5 (17.Qe5 Kf7 18.Na4 Rc2 19.Nc5 Rc5 20.Qd6+–) 1–0. mtr – DENSE, internet, 2001.

5.Bh8 Nf6 6.Bf6 Qf6 7.c3 Ba5 8.Bb5 c6 9.Be2 Bf5 10.Qa4 Bc7 11.Qd1 Nd7?? 12.Bg4 0–0–0 13.Bf5 Qf5 14.Ne2 Nc5 15.0–0 Nd3 16.f3 ef3 17.Rf3 Qe5 18.Nf4 Nb2 (18...Nb2 19.Qc2 Nc4 20.Qh7 Nd6+–; 18...Rg8 19.Qe2 (19.Nd3 Qh2 20.Kf1 Rg2=) 19...Nf4 20.Rf4+–). makaveli1982 – genpachi, internet, 2007.

5.Bh8 Nf6 6.Bf6 Qf6 7.c3 Bc5 8.Bb5 c6 9.Ba4 b5 10.Bc2 Qg6 11.g3 Bg4 12.Qc1 Nd7 13.Ne2 Ne5 14.Nf4 Nf3 15.Kf1 Qf6 16.d4 ed3 17.Bd3 b4 18.Bh7 Qh6 19.Qc2 bc3 20.Nc3 d4 21.Na4 Bb4 22.Be4 de3 23.Qc6 Qc6 24.Bc6 Ke7 25.Nd5 Kd6 26.Nb4 Nd2 27.Ke1 Rb8 28.f3 Rb4 29.fg4 Kc6 30.Rc1 Kb5 31.Nc3 Ka5 32.Ke2 Nc4 33.Nd5 Rb2 34.Kd3 Ne5 35.Ke3 Ng4 36.Kf4 Nf2 37.Rhf1 Ra2 38.Rc5 Ka4 39.Nc3 Kb4 40.Na2 Kc5 41.Rf2 a5 42.Ke4 Kc4 43.Rf7 Kb3 44.Ra7 a4 45.Ra4! Ka4 46.h4 Kb3 47.h5 Ka2 48.h6 Kb3 49.h7 Kc4 (49...Kc4 50.g4 Kc3 51.h8Q Kb4 52.Qd4 Kb3 53.Kd3 Ka3 54.Kc3 Ka2 55.Qf2 Ka3 56.Qa7#). makaveli1982 – genpachi, internet, 2007.

5.Bh8 Nf6 6.Bf6 Qf6 7.c3 d4 8.cd4 c5 9.a3 Ba5 10.Qa4 Nc6 11.Bb5 Bd7 12.Bc6 Bc6 13.Qa5 cd4 14.ed4 Qd4 15.Nc3 Rd8 16.Rd1 Qf6 17.Nge2 e3 18.0–0 ed2 19.Qa7 Kf8 20.Qe3 Re8 21.Qc5 Kg8 22.Rd2 h6 23.Rfd1 Kh7 24.Ng3 Re5 25.Qd4 Qe6 26.Qd3 Kg7 27.h3 h5 28.Qd8 h4 29.Qh4 (29.Qh4 Qf6 30.Nh5 Rh5 31.Qh5+–) 1–0. bratek55 (1695) – kvcalle (1670), kurnik, 2011.

5.Bh8 Qg5 6.Nc3 Bc3 (6...Ne7 7.a3 Bc5 8.Nge2+–) 7.Bc3 Bg4 8.Qb1 b6 9.Qb5 c6 10.Qb2 Nd7 11.h3 Be6 12.Ne2 f6 (12...Ne7 13.Nd4+–) 13.Nd4 f5 (13...Nc5+–) 14.Ne6 (14.Ne6 Qe7 15.Nc7 Kf7 16.Na8+–) 1–0. pcmvr – mpopp (2030), net–chess.com, 2012.

4.Bg7 Be7

5.Bh8 f6 6.Qh5 Kf8 7.Qh7 Ke8 8.Qg8 Bf8 9.Bc4 d5+– 10.Qg6 Kd7 11.Qf7 Qe7 12.Qd5 Ke8 13.Nc3 Nc6 14.Qe4 Bd7 15.Qe7 Be7 16.Nd5 Bd6 17.Nf6 Ke7 18.Bg7 Kd8 19.Nd7 Kd7 20.Nf3 Re8 21.Nd4 Re7 22.Nc6 Kc6 23.Bf8 Re4 24.Be2 Bf8 25.Bf3 Kd5 26.Be4 Ke4 27.f3 Kd5 28.Rb1 b6 29.h4 Bh6 30.g4 Ke5 31.f4 Ke6 32.f5 Kf7 33.g5 Bg7 34.g6 Kf6 (34...Kf6 35.e4 c5+–). makaveli1982 – adamh1towins, internet, 2007.

5.Bh8 Bf6 6.Bf6 Qf6 7.Nc3 d6 (7...Qf5 8.d3 d5 9.de4 de4 10.Qd4+–) 8.Bc4 (8.Ne4 Qe7 9.Bd3 Nd7+–) 8...a6 (8...Qg6 9.Nge2+–) 9.a4 (9.Ne4 Qg7+–) 9...Qg7 10.g3 (10.Ne4 Qg2 11.Bd5 Qg6+–) 10...Bg4 (10...Nf6 11.f3+–) 11.Be2 (11.Qb1!? Bc8+–) 11...Bf5 12.Nd5 Kd7 13.h3 Be6 14.Bg4 (better is 14.Nf4+–) 14...f5 15.Nf4 fg4 16.Ne6 Ke6 17.Qg4 Qg4 18.hg4 Nf6 (18...h6 19.d3+–) 19.g5 Nd5 20.Rh7 Nb4 (20...Kf5 21.c4 Kg6 22.Rh4+– (22.cd5?! Kh7 23.Rb1 b5+–)) 21.Kd1 N8c6 22.Rc7 Rh8 23.g6 Ne7 (23...Kf6 24.g7 Rg8 25.Rb7+–) 24.g7 Rg8 25.Rb7 a5 26.Nh3 Rg7 27.Nf4 Kf7 28.c3 Nd3 29.Ke2 Ne5 30.Nd5 (30.Rh1 Ng4+–) 30...N5g6 (30...Ke6 31.Nc7 Kd7 32.Rab1+–) 31.Rh1 (31.Rd1 Ke6 32.Nc7 Kd7 33.Nb5 Kc6 34.Rc7 Kb6+–) 31...Ke6 32.Ne7 Re7 33.Re7 Ne7 34.f3 d5 (34...Nf5 35.Kf2 d5 36.g4+–) 35.Rf1 (better is 35.fe4 de4 36.Rh4 Kf5+–) 35...Nf5 36.Rg1 Kd6 (36...ef3 37.Kf3 Nd6 38.Rb1+–) 37.g4 Nh4 38.f4 Nf3 (38...Kc6 39.Rh1 Nf3 40.d3+–) 39.Rf1 Nh2 40.Rh1 (better is 40.g5 Ke7+–) 40...Nf3 (40...Ng4 41.Rb1+–) 41.g5 1–0. Ficek,Szymon – Pawlikowski,Jakub, Turniej Pierwszej Szansy C11 POL, 1999 (?).

5.Bh8 Bf6 6.Bf6 Qf6 7.Nc3 Qe5 8.Qg4 Nf6 9.Qg7 Nc6 10.f4 Qe7 (10...Qf5 11.Nb5 Ke7+–) 1–0. marekt – nublood, GameColony.com, 2002.

5.Bh8 Bf6 6.Bf6 Qf6 (6...Nf6 7.Nc3+–) 7.Nc3 Nh6 (7...Qe7 8.d3+–) 8.Ne4 Qf5 (8...Qg6 9.Ng3+–) 9.Bd3 Qe6 (9...Qg6 10.Ng3 Qg7 11.Rb1+–) 10.Qf3 f5 11.Nc3 d5 (11...Nc6 12.Nb5 Kd8 13.Qg3+–) 12.Nd5 Kd8 13.Nf4 Qf6 14.Rb1 c6 15.Qg3 Nd7 16.Nf3 Nc5 17.Nd4 Bd7 18.Bc4 b5 19.Nde6 (better is 19.Bb3 Nb3 20.ab3 Ke8+–) 19...Be6 (19...Ne6 20.Ne6 Ke7+–) 20.Ne6 Ne6 21.Qd6 Ke8 22.Qc6 Kf8 (22...Kf7 23.Be6 Qe6 24.Qa8+–) 23.Qa8 Kg7 24.Qa7 Kg6 25.Bb5 (25.Be6 Qe6 26.Rb5 Ng4+–) 25...Qg5 26.Be8 Kf6 27.Qh7 Nf8 28.Rb6 Ke5 (28...Ne6 29.Qd7 Qg8 30.Qd4 Ke7 31.Rb7 Nc7 32.Rc7 Ke6 33.Qb6 Kd5 34.Qc6 Ke5 35.d4) 29.Qh8 Ke4 (29...Qf6 30.Qf6 Kd5 31.Qd4) 30.Bc6 1–0. pierre_d – mimi, ChessWorld.net, 2005.

5.Bh8 Bf6 6.Bf6 Nf6 7.Nc3+–.

4.Bg7 f6

5.Qh5 Ke7 6.a3 Bd6 7.Bh8 Qe8 (7...Be5 8.Qh7 Ke6 9.c3+–) 8.Qh7 Ke6 (8...Kd8 9.Nc3 Be5 10.Qe4 Qh5+–) 9.Bc4 Ke5 10.Nf3! ef3 (10...ef3 11.d4) 11.d4 1–0. pvanr (2025) – mrskywalker, gameknot.com, 2010.

5.Qh5 Ke7 6.c3 Bd6 7.Bh8 Qf8 (7...Kf8 8.Qh7 Qe7 9.Qh5+–) 8.Qh7 Kd8 (8...Qf7 9.Qe4 Be5 10.Bc4+–) 9.Bc4 Ne7 10.Bg7 Nec6 (10...Qe8 11.Bf6 c6+–) 11.Bf8 Bf8 12.Qg8 (12.Qg8 d5 13.Qf8 Kd7 14.Bd5+–; 12.Qf7 d5 13.Qf8 Kd7 14.Bd5 Ne7 15.Be4 c5+–) 1–0. nordlicht – EduardM, Jahresabschlussturnier, 2004.

5.Qh5 Ke7 6.Bc4 (6.c3!? Ke6 7.Qh4 Nh6 8.cb4 Nf7 9.Bh8 Qh8 10.Qe4 Ne5+–) 6...d5 7.Bd5 Kd6 (7...c6 8.Be4 f5 9.Qh4 Ke8 10.Qd8 Kd8 11.Bd3+–) 8.Be4 (better is 8.Bh8!? f5 9.Qf7 Nc6+–) 8...Ne7 9.Bh8 (9.c3!? f5 10.cb4 Re8+–) 9...Qh8 10.c3 (better is 10.Qh7 Qh7 11.Bh7 Nbc6+–) 10...Nbc6 (10...f5 11.Bf3+– (11.cb4?! Qa1 12.Bd3 Be6+–)) 11.Ne2 (11.d4 Nd4 12.ed4 f5+–) 11...Bd7 (11...f5 12.Bc6 (12.cb4?! Qa1 13.Qh6 Be6+–) 12...Nc6 13.d4+–) 12.Nd4 (12.cb4 Nb4 13.Nbc3 Bc6+–) 12...Ba5 (12...Nd4 13.ed4 f5 14.Bb7 Rb8+–) 13.Na3 Nd4 (13...Be6 14.Bc6 Nc6 15.Nc6+–) 14.Nc4 Ke6 15.Qa5 (15.ed4 f5 16.Bb7 Bb6+–) 15...Nc2 (15...Bc6 16.Qc7 Qb8 17.Qb8 Rb8 18.Bc6 Ndc6+–) 16.Bc2 Bc6 (16...b6 17.Qh5 Bc6 18.Qh3 Kf7 19.d4+–) 17.Qc7 Qg8 (17...Qb8 18.Qb8 Rb8 19.e4+–) 18.e4 (18.Qd6 Kf7 19.Ne5 Ke8 20.Qf6 Rc8+–) 18...Qg2 19.0–0–0 (better is 19.Ne3 Qh1 20.Ke2 Qe4 21.Be4 Be4 22.Qc4 Bd5 23.Nd5 Nd5+–) 19...Qf2 (19...Rc8 20.Qd6 Kf7+–) 20.Nd6 Qc5 21.Bb3 Nd5 (21...Qd5 22.ed5 Ke5 23.Rhf1 Nd5 24.d4 Ke6 25.Rde1) 22.ed5 Ke5 23.Rde1 1–0. Trkn – boddymi, itsyourturn.com, 2001.

5.Qh5 Ke7 6.Bh8 c5 7.Qh7 Kd6 8.c3 Nc6 (8...Ba5 9.Na3 Kc6 10.Bb5 Kc7 11.Bc4+–) 9.cb4 Nb4 10.Qe4 Nh6 11.Na3 Kc7 12.Qf4 Kc6 13.Bb5 Kb6 14.Qd6 Nc6 15.Bc6 bc6 16.Rb1 1–0. marekt – fitachan, chesshere.com, 2005.

5.Qh5 Ke7 6.Bh8 Qf8 7.Qh7 Ke8 8.Qe4 Qe7 9.Qg6 Qf7 10.Qf7 Kf7 11.Bc4 Kf8 12.Bg8 Kg8 13.Bf6 d6 14.a3 Ba5 15.Bc3 Bb6 16.Ne2 Nc6 17.Nf4 Bf5 18.d3 Re8 19.Nd5 Kf7 20.Nd2 (20.Nd2 Be6 21.Nb6 ab6 22.h4+–) 1–0. JF_ – breaker, ChessWorld.net, 2004.

5.Bh8 d5 6.a3 Bd6 7.Nc3 Be6 8.d3 (8.Qh5 Bf7 9.Qh7 Qe7+–) 8...f5 (8...Qd7 9.Qh5 Qf7 10.Qf7 Kf7 11.de4+–) 9.Qh5 Kd7 10.Qh7 Be7 (10...Kc8 11.Nb5 Bc5 12.c4+–) 11.Bg7 (11.de4 fe4 12.Nd5 Bd5+–) 11...Nc6 12.Nge2 Qe8 13.Nf4 Qf7 14.Ne6 Qe6 15.Qh5 (better is 15.de4!? de4 16.Nd5 Rd8+–) 15...Rd8 16.Be2 Kc8 17.0–0 (17.g4 Bf8 18.Bh8 Nh6 19.gf5 Qg8+–) 17...Nf6 18.Bf6 (18.Qh6!? Qf7 19.de4 fe4+–) 18...Bf6 19.d4 Rh8 20.Qg6. Fournier,Frederic (1675) – uzbekanz (1640), Active, 2006.

5.Bh8 Qe7 6.c3 Bd6+–.

5.Bh8 Qe7 6.Qh5 Kd8 7.Nc3 (better is 7.Bc4 Qf8 8.Qh7 Ne7+–) 7...Bc3 8.dc3 Nc6 (8...Qa3 9.Ne2 Qe7 10.Ng3+–) 9.Bc4 Qf8 (9...Ne5 10.Bg8 Ng6 11.Qh7 Qh7 12.Bf6 Qe7 13.Be7 Ne7 14.Bh7+–) 10.Qh7 (10.Qh7 Nce7 11.Bg7+–) 1–0. bambinik – Semplice, gameon.it, 2001.

5.Bh8 Qe7 6.Qh5 Qf7 7.Qb5 Nc6 8.a3 Ba5 9.Qa4 d5 (9...Qe6 10.Ne2+–) 10.Nc3 (better is 10.Bb5 Nge7 11.Qa5 Qf8+–) 10...Bc3 11.dc3 Bd7 (11...Nge7 12.c4 dc4 13.Qb5+– (< 13.Bc4 Qf8+–)) 12.Qb3 b6 13.Ne2 (better is 13.c4 Ne5 14.cd5 Ne7+–) 13...0–0–0 14.Nd4 (14.Rd1!? Nge7 15.c4 dc4+–) 14...Na5 15.Qb2 Kb7? (15...Ne7 16.c4 Nc4 17.Bc4 dc4 18.a4+–) 16.Bb5 (16.c4!? Ne7 17.cd5 Nd5+–) 16...Ne7 17.Bf6 Qf6 18.0–0 a6 19.Bd7 Rd7 20.Rab1 Nc4 21.Qb4 Nd2 (21...Rd8 22.Rfe1+=) 22.Rfd1 (better is 22.Nb3 Nf3 23.Kh1+–) 22...Nb1= 23.Rb1 Nc6 24.Qb3 Na5 25.Qa4 Qe6?? (better is 25...Rf7 26.f4 Nc4–/+) 26.Ne6+– Rd6 27.Qa5 Re6 28.Qd5 Rc6 29.Rb4 Ka7 30.Qc6 1–0. revbodio1 – Gatos, Live Game Caissa's Web, 2004.

5.Bh8 Qe7 6.Qh5 Qf7 7.Qf7 Kf7 8.Bc4 Kf8 9.Bg8 Kg8 10.Bf6 d6 11.Ne2 Bg4 12.Nf4 Kf7 13.Bb2 Nc6 14.h3 Bf5 15.0–0 Re8 (15...Rg8 16.f3 ef3 17.Rf3 Bc2 18.Nd5 Ke6 19.Nc7 Kd7 20.Nd5+–) 16.f3 ef3 17.Rf3 Ke7 (17...Rc8+–) 18.Nd5 (18.Nd5 Kd8 19.Rf5+–) 1–0. DEFFM – GuestTPBS, freechess.org, 2017.

5.Bh8 Qe7 6.Qh5 Kf8 7.c3 Bd6 8.Bc4+–.

4.Bg7 Nf6

5.Bh8 Nc6 6.c3 Ba5 (6...Bc5 7.c4 d5 8.Nc3+–) 7.Qc2 (better is 7.Qa4!? Kf8+–) 7...d5 8.Bb5 Bd7 9.Qa4 (9.Qa4 Bb6 10.Ne2+–) 1–0. Macedo,A Soares De (1875) – Da Silva Miguel,L Ramonn, 11th IRT Academia Potiguar de Xadrez, 2015.

5.Bh8 d5 6.Nc3 Nbd7 7.Rb1 (7.Nge2 Kf8+–) 7...Bd6 8.d3 Qe7 9.de4 de4 10.Nb5 Bb4 (10...Kf8 11.Nd6 cd6 12.Bc4+–) 11.c3 Bd6 12.Nd6 Qd6 13.Qd6 cd6 14.Rd1 Ke7 15.Ne2 b6 16.Ng3 Nc5 (16...d5 17.Bg7+–) 17.Bc4 (17.Bf6 Kf6 18.Rd6 Be6+–) 17...Be6 (17...Ng4 18.Bd4 f5 19.Bc5 bc5 20.Rb1+–) 18.Bf6 Kf6 19.Rd6 Ke5 20.Rd4 Bc4 21.Rc4 f5 (21...Rg8 22.Rd4 Rg6 23.Ke2+–) 22.0–0 Rd8 (22...Rf8 23.Rd4 h6 24.Rfd1+–) 23.Rd4 Ne6 (23...Rf8 24.f3 ef3 25.Rf3+–) 24.Rd8 Kf6 (24...Nd8 25.Rd1 Nc6+–) 25.Ra8 Nc7 26.Ra7 Nd5 27.Ra6 Nc3 28.Rb6 Kg5 29.Rc1 (29.f4 Kg4 30.Kf2 Nd1 31.Rd1 h6 32.h3 Kh4 33.Rh6) 29...Nd5 30.Rd6 Nf6 (30...Ne7 31.Rc7 f4 32.Rc5 Nd5 33.Rcd5 Kg4 34.h3 Kh4 35.Rh6) 31.Rf6! (31.Rf6 Kf6 32.a4+–) 1–0. Woelfelschneider,Peter (2300) – Lazarov,Alexander (1825), remoteschach.de, 2005.

5.Bh8 d5 6.c4 Bg4 7.Qa4 Nc6 8.cd5 Qd5 9.Bf6 Qc5 (9...Qd6 10.a3 Qf6 11.ab4+–) 10.Nc3 Bc3 11.dc3 Qc3 (11...Qf5 12.Bd4 Qg6+–) 12.Bc3 1–0. GuestVVXJ – quebracranio, freechess.org, 2017.

5.Bh8 d5 6.Ne2 +–.

5.Bh8 d5 6.Bf6 Qf6 7.c3 Ba5 8.Qa4 Nc6 9.Bb5 Bb6 10.Bc6 bc6 11.Ne2 Bd7 12.Nf4 0–0–0 (12...Rb8 13.Na3+–) 13.0–0 Kb8 (13...Rg8 14.Kh1+–) 14.Qb3 Rg8 15.a4 Bh3 16.Nh3?? (16.Rc1 Bg2 17.d4 Bf3 18.Kf1+=) 16...Qf3?? (better is 16...Rg2! 17.Kh1 Qf3=) 17.Nf4+– h5 18.Qd1 (better is 18.h3 Kc8+–) 18...Kc8 19.Qf3 ef3 20.g3 h4 21.d4 Kd7 (21...Ba5 22.Rc1+–) 22.Nd2 (better is 22.a5 Ra8+–) 22...Ba5 23.Rac1 Kd6 24.Nf3 hg3 25.fg3 Rd8 26.Kf2 (26.Ne5 Rg8 27.Nf7 Kd7 28.Ne5 Kd6+–) 26...Bb6 (26...Rb8 27.c4 Rb2 28.Kg1+–) 27.h4 c5 28.h5 1–0. Mavromoustakos,Thomas – Nteoudis,K, Ambelokipi op, 2005.

4.Bg7 Qg5

5.Bh8 b5 6.Bc3 (6.a4 c6+–) 6...Bc3 (6...Be7 7.Nh3 Qf5 8.Bd4+–) 7.Nc3 Na6 (7...d5 8.Nb5 Qe7 9.Rb1+–) 8.Ne4 Qg6 9.Nc3 Rb8 (9...Nb4 10.Rc1 a6 11.a3+–) 10.Nf3 (10.Nb5 Rb5 11.Bb5 Qg2+–) 10...Nb4 11.d3 (11.Rc1 a6+–) 11...a6 (11...Bb7 12.e4 Qc6 13.Qd2 Nc2 14.Qc2+–) 12.g3 (12.a3 Nc6+–) 12...Bb7 (12...Qc6 13.Kd2+–) 13.Bg2 Qc6 (13...Ne7 14.Rb1 Qf6 15.Kd2+–) 14.Qd2 Qf6 15.Nh4 (15.e4 Ne7+–) 15...Nd5 16.Bd5 (16.d4 Nc3 17.Qc3 Bg2 18.Ng2 Qd6+–) 16...Bd5 17.0–0 Bf3 (17...Bb7 18.e4+–) 18.Ne4 (18.e4 Ne7+–) 18...Be4 19.de4 Rb6 20.Nf5 h5 (20...Ne7 21.Rfd1 d6 22.Ne7 Qe7 23.Qd4+–) 21.Rad1 d6 22.Qd4 Qe6 (22...Kd7+–) 23.Ng7 Kd7 24.Ne6 fe6 25.Qg7 Ne7 26.e5 (26.f4 Rb8 27.f5 Rg8+–) 26...d5 27.e4 c6 28.ed5 cd5 29.f4 Rb8 30.Qf7 Rg8 31.f5 ef5 32.Rd5 Kc8 33.Qe7 h4 34.Qe6 Kb7 35.Qg8 hg3 36.Qe6 1–0. Borsuk,Pavel – Tsutsoev,Zelimkhan, RUS–ch U10 Serpukhov, 2001.

5.Bh8 d5 6.Nc3 +–.

5.Bh8 d6 6.a3 Ba5 7.Nc3 Bg4 8.h4 Qg6 9.h5 Bd1 10.hg6 Bc2 11.gh7 Kf8 12.hg8Q Ke7 13.Nd5 Ke6 14.Qe8 Kd5 15.Rh5 (15.Rh5 f5 16.Rf5#) 1–0. lasker (2255) – Mustapekka, internet, 2008.

5.Bh8 f6 6.c3 Bd6 7.Nh3 Qg6 8.Be2 Qg2 (8...Kf8 9.f4 h5+–) 9.Rg1 Qh3 10.Rg8 Bf8 11.Bg7 Kf7 12.Rf8 Kg7 13.Rc8 Qh2 (13...b6+–) 14.Qb3 (14.Qb3 Qh1 15.Bf1+–) 1–0. Fournier,Frederic (1695) – pion1111 (1710), rated blitz game, 2002.

5.Bh8 f6 6.Nc3 Bc3 7.dc3 d5 8.c4 Bg4 9.Qd5 Qd5 10.cd5 Nd7 (10...Nd7 11.h3 Bh5+–). cole baker – juancabeta, internet, 2005.

5.Bh8 f6 6.Be2 d6? (6...Qg2 7.Bh5 Ke7+–) 7.Bh5 Ke7 8.g3 Qe5 (8...Nh6 9.c3 Bc5 10.d4 ed3 11.Qf3+–) 9.c3 Ba5 10.Ne2 (better is 10.g4+–) 10...Qh5 11.0–0 (better is 11.Qb3 Qf3 12.Rf1+–) 11...Bg4= 12.Re1 (better is 12.Qb3 Be2 13.Qb7 Bf1 14.Na3+=) 12...Bf3?? (better is 12...Nd7 13.Qa4 Be2 14.Re2 Qe2 15.Qe4 Ne5 16.Qb7 Qf3–+) 13.Nf4?? (13.Qb3 Be2 14.Qb7= (worse is 14.Qg8 Bf3=)) 13...Bd1–+ 14.Nh5 Bh5 15.d3 (15.h3–+) 15...ed3 16.h3 Be2 17.g4 Nc6 18.a3 (18.f4 Kf7 19.g5 Bb6–+) 18...Ne5 19.Ra2 (19.Nd2 Bc3 20.Rec1 Ba1 21.Ra1–+) 19...Nf3 20.Kg2 Ne1 (20...Ne1 21.Kg3 Nh6–+) 0–1. GuestMWTL – GuestKNTZ, freechess.org, 2017.

5.Bh8 f6 6.Nh3 Qf5+–.

3.e3 Nc6

4.b5 Nb8 5.d3 Nf6 6.Nc3 =.

4.b5 Na5

5.d3+= ed3 6.Bd3 Bb4 (6...d5 7.Nf3+=) 7.Nd2 Bd2 (better is 7...Nf6!?+=) 8.Qd2+– (8.Qd2 Qg5 9.f4+–; worse is 8.Kd2 Nf6+/-) 1–0. Khayman,Daniel (1640) – Kolok,Baksa (1700), FICGS, 2007.

5.d3+= Nf6 6.Bc3 c6 7.Qd2+=.

5.d3 Nf6 6.de4 Ne4 7.Qd4+=.

4.b5 Nb4

5.a3 Nd5 6.c4 Ndf6 7.d3 ed3 8.Bd3 d5 9.Qc2 dc4 10.Bc4 Bd6 11.Qb3 Nh6 12.Nf3 0–0 13.Nbd2 Nf5 14.Rd1 Qe8 (14...Qe7 15.Bd3 Nh6 16.Bf6 Qf6 17.Ne4+/–) 15.0–0 (better is 15.Bf6 gf6 16.Bd3+/–) 15...Ng4? (15...Be7 16.e4 Nd6 17.e5 Nc4 18.ef6 Nd2 19.Nd2 Bf6 20.Bf6 gf6 21.Rfe1+/–) 16.h3 (better is 16.e4 Ne7 17.h3+–) 16...Ne5+/– 17.Ne5 (17.e4!? Nc4 18.Nc4+/– (18.Qc4?! Nh6+/–)) 17...Be5 18.Be5 Qe5 19.Nf3 Qf6 20.e4 Nd6?? (20...Nh4 21.Nh4 Qh4 22.Rfe1+/–) 21.Bd5?? (better is 21.e5 Qg6 22.ed6 Bh3 23.Nh4+–) 21...Qg6 (21...Nb5 22.Qb5 c6 23.Qb3 cd5 24.ed5+= (worse is 24.Qd5 Bh3 25.Qb7 Qg6+=; worse is 24.Rd5 Be6–/+)) 22.Ne5 Qh5 23.Nc4 Nc4 24.Bc4 Rb8 (24...Qg6 25.Qg3+=) 25.Rd5 Qg6 26.Qf3 (26.Rc5 Qe4 27.Rc7 Qf4+/–) 26...Be6=. GuestMXLJ – guestfighter, freechess.org, 2017.

5.Nc3 b6?? 6.a3+– Nc6 (6...Nf6 7.ab4 Bb4 8.Ra4+–) 7.bc6 dc6 (7...Nf6 8.Nh3+–) 8.Ne4 a5 (8...Qd5 9.d3+–) 9.Bd3 Nh6 10.Nf3 Nf5 (10...Qe7 11.0–0+–) 11.Ne5 Be7 (11...Be6 12.0–0+–) 12.Nc6 (12.Nc6 Qd7 13.Ne5+–) 1–0. pierre – polimex, internet, 2009.

5.Nc3 Nf6+=.

3.e3 d5

4.a3 b5 5.Bb5+/- c6 6.Be2 Nf6 7.d3 Bf5 8.Nd2 ed3 9.Bd3 Bd3 10.cd3 Be7 11.Ngf3 0–0 12.0–0 Nbd7 13.Ne5 (13.Rc1!? Qb6+–) 13...Ne5+/- 14.Be5 Bd6 15.Nf3 Ng4 16.Bd6 Qd6 17.h3 Nf6 18.Rc1 Rfe8 (better is 18...a5!?+/-) 19.Qc2 Rac8 20.Qc5 Qc5 21.Rc5 Nd7 22.Rc3 Nb6 23.Rfc1 Re6 24.Nd4 Na4 25.Rc6 Rec6 26.Rc6 Rc6 27.Nc6 a6 28.Ne7 Kf8 29.Nd5 a5 (29...Nb2+–) 30.ba5 Nc5 31.d4 (better is 31.Nc7 Ke7 32.a6 Na6 33.Na6 h6+–) 31...Na6 32.Kf1 Ke8 33.Ke2 Kd7 34.Kd3 Kd6 35.Kc4 Nc7 (35...Nb8+–) 36.Nc7 Kc7 37.Kc5 f5 38.d5 g5 39.d6 Kd7 40.a6 h5 41.a7 g4 (41...Ke6 42.a8Q Kf7 43.d7 h4 44.Qe8 Kg7 45.d8Q Kh6 46.Qe6 Kh5 47.Qde8) 42.hg4 (42.a8Q f4 43.Qg8 fe3 44.Qf7 Kd8 45.Qe7 Kc8 46.Qc7) 42...hg4 43.a8Q 1–0. Fournier,Frederic (1855) – xies (1810), Active, 2004.

4.a3 b6 5.c4 Be6 6.cd5 (6.cd5 Bd5 7.d3+=). Fournier,Frederic (2110) – chiltepin, Active, 2004.

4.a3 c6 5.c4 (--> 4.c4 c6 5.a3).

4.a3 Nc6 5.c4 Be6 6.Nc3 d4 (6...dc4!? 7.Ne4 b5=) 7.Ne4 d3 (7...f5 8.Ng3 de3 9.de3 Nf6+–) 8.Qb3+– Nf6 (8...f5 9.Ng3 Nge7+–) 9.Nf6 gf6 10.Bd3 Bg7 (10...a5 11.Be4+–) 11.Be2 Qd7 12.d4 a5 (12...Bf5+–) 13.d5 a4 14.de6 Qe6 (14...fe6 15.Qc2+–) 15.Qc2 0–0–0 (15...h6 16.Nh3+–) 16.Qa4 Kb8 17.Qc2 Rhe8 (17...Ne5 18.Nh3+–) 18.Qh7 Rg8 19.Nf3 Qd6 (19...Bf8 20.Qh3 Qh3 21.gh3+–) 20.0–0 Rh8 (20...Qe6+–) 21.Qg7 Ne5 22.Ne5 fe5 23.Be5 Qe6 24.Bg4 Qc4 25.Rac1 Rhg8 26.Rc4 Rg7 27.Bc7 Ka7 28.Bd8 f6 29.b5 b6 30.Ra4 1–0. Fournier,Frederic (2080) – NN, Active, 2004.

4.a3 Nd7 5.c4 dc4 6.Bc4 Ne5?? (better is 6...Nb6 7.Be2 a5+=) 7.Be5+– Nf6 8.Bb2 Bd6 9.d3 ed3 10.Bd3 0–0 11.Nf3 Bg4 12.Be2 Ne4 13.0–0 Bf3 14.Bf3 (14.gf3?! Bh2 15.Kh2 Qh4 16.Kg2 Qg5 17.Kh1 Qh5 18.Kg1 Qg5 19.Kh2 Qh4 20.Kg1 Qg5 21.Kh2 Qh4=) 14...Qh4 15.g3 Ng3 (15...Qe7+–) 16.fg3 Bg3 17.hg3 Qg3 18.Bg2 Qe3 19.Rf2 Rad8 (19...Qg3 20.Nc3+–) 20.Qf1 (20.Qg4 f6 21.Bb7 c5+–) 20...g5 (20...c6 21.Nc3 Rfe8 22.Rd1+–) 21.Nc3 g4 (21...Rd2 22.Nd5 Rf2 23.Qf2 Qf2 24.Kf2+–) 22.Re1 Qb6 23.Ne4 (23.Nd5 Rd5 24.Bd5 Qf6 25.Rf6 g3 26.Rf7 h5 27.Rc7 Rf7 28.Qf7) 23...f5 (23...Rd6 24.Qc4 h5 25.Nd6 Qd6 26.Rf7 Qb6 27.Rf2 Kh7 28.Be4 Qg6 29.Rf7 Kg8 30.Bg6 Rf7 31.Qf7) 24.Ng3 (24.Qc4 Rf7 25.Ng5 Qf2 26.Kf2 Rd2 27.Kg1 Rg2 28.Kg2 f4 29.Qf7) 24...f4 (24...Rf7+–) 25.Qc4 Rf7 26.Nh5 (26.Bd5 Kf8 27.Nh5 Rdd7 28.Bf7 Qe3 29.Bg7 Ke7 30.Re3 fe3 31.Qe6 Kd8 32.Qe8) 26...g3 27.Nf6 Kf8 28.Qf4 Qf2 29.Qf2 gf2 30.Kf2 Rd2 31.Re2 Rd5?? 32.Bd5 1–0. Fournier,Frederic – mcpatoperu, Active, 2007.

4.a3 Be6 5.Ne2 Nf6 6.Nf4 Nbd7 7.c4 c6 8.Ne6 fe6 9.cd5 ed5 10.d3 ed3 11.Bd3 Be7 12.0–0 0–0 13.Nc3 Nb6 14.Qc2 h6 15.Ne2 Rc8 16.Nf4 Qd6 17.Ng6 Rfe8? 18.Be5 Qd8? 19.Bf5+– Nbd7?? 20.Bd4 Ra8?? 21.Be6 Kh7 22.Ne7 Ne4 23.Bf5 Kh8 24.Ng6 Kg8 25.Be4 Re4 26.Qc3 Nf6 27.Bf6 Qf6 28.Qf6 gf6 29.Nf4 b6 30.Rfd1 a5 31.b5! cb5 32.Nd5 Kf7 33.Nb6 Ra6 34.Nd5 Ra4 35.Nc3 (35.Nc3 Rc4 36.Nb5+–) 1–0. kiloracer (2150) – davorcecelja (1735), net–chess.com, 2005.

4.a3 f6 (--> 1.b4 e5 2.Bb2 f6 3.a3 d5 4.e3 e4).

4.a3 Bg4?? 5.Be2 h5 6.Bg4+= hg4 7.Qg4 Bd6?? 8.Qg7+– Rh6 9.Qg8 Bf8 10.Bg7 (10.Bg7 Qd6 11.Nc3+–) 1–0. Mengs – breaker, ChessWorld.net, 2004.

4.a3 Qg5 5.h4 Qh6 6.c4 c6 7.cd5 cd5 8.Nc3 Nf6 9.Qb3 Be6 10.Nb5 Na6 11.Nd4 Bd7 12.Ba6 ba6 13.Rc1 Bd6 14.Nge2 (14.Nde2 Rd8 15.Bf6 Qf6 16.Qd5+=) 14...g5 (14...0–0!?=) 15.g3 (15.Nc2 Be6+/-) 15...Rg8 (15...a5 16.b5+=) 16.Nc6 Bg4 (16...Rc8!? 17.Na5 Rc1 18.Nc1 Be7+=) 17.Bf6+– Qf6 18.Ncd4 (18.Qd5 Qf3 19.Kd1 Qe2 (19...Qh1?? 20.Kc2 Rg6 21.Rh1 Be2 22.hg5+–) 20.Kc2 Be6 21.Qe4 Rc8–+) 18...Be6 (18...Qe5!?+/-) 19.hg5+– Rg5 20.Rh7 Bg4 (20...Bd7 21.Nf4 Qe5 22.Nc6 Bc6 23.Rc6+–) 21.Qa4 Kf8 22.Qa6 Kg8 23.Rh1 Rg6 (23...Qd8 24.Nf4+–) 24.Nf4 (24.Qb7!? Re8+–) 24...Bf4 25.Rc6?? (better is 25.Qf6 Rf6 26.gf4+–) 25...Bd6-/+ 26.Qb7 Re8 27.Qa7 Bf3 28.Rg1 Qg5 29.b5 Be5 30.Nf3 ef3 31.Qd7 Rge6 32.Re6+/- Re6 33.Qd5 Qf5 34.Qb3 Bc7?? 35.Rh1+/- Re5 36.a4 Rc5 37.Kd1 Ba5 38.Qb2 f6 39.Qb3 Qd5? 40.Qd5+– Rd5 41.d4 Kf7 42.Kc2 Ke6 43.Kd3 Bb6 44.Rc1 Bd8 45.e4 Rg5 46.Rc6 Kd7 47.Ke3 Bc7 48.Kf3 Bd6 49.Ke3 Rh5 50.Rc4 Rh1 51.Rc6 Rb1 1–0. Cabarkapa,Novak (1970) – Ridjicki,Vlajko (1775), Senta op–B, 2008.

4.a3 h5 5.c4 c6 6.Nc3 Bd6 7.d3 Qh4? (7...Bg4!? 8.Qc2 ed3 9.Bd3 a5+=) 8.g3 (better is 8.de4 Bg4 9.Nf3 Bf3 10.gf3+–) 8...Bg3? (better is 8...Qe7 9.cd5 Bg4+/–) 9.fg3+– Qf6 (9...Qg5 10.cd5 Qe3 11.Qe2 Qe2 12.Be2 ed3 13.Bd3+–) 10.Nge2 (10.cd5!? h4 11.Qd2 ed3 12.Bd3 hg3+–) 10...Bg4 (10...Qf3 11.Rg1 Qe3 12.de4 dc4 13.Qd4 Qd4 14.Nd4+–) 11.Bg2 Nd7 (11...ed3 12.Qd3 dc4 13.Qd2+–) 12.Rf1 (12.cd5 ed3 13.Qd3 Ne5+–) 12...Bf3 (12...Be2 13.Qe2 (13.Rf6?! Bd1 14.Rf4 Bf3 15.Bf3 ef3+=; worse is 13.Ke2 ed3 14.Qd3 dc4 15.Qc4 Nb6+–; worse is 13.Ne2 Qb2 14.de4 dc4+=) 13...ed3 14.Qd2+–) 13.Bf3 (better is 13.de4 de4 14.Ne4 Qb2 15.Nd6 Kf8 16.Rf3 Ne5+–) 13...ef3 14.Nf4 h4 (14...dc4 15.dc4 (worse is 15.Rf3 Ne5+–) 15...Qe7 16.Qf3+–) 15.Qf3 (15.Rf3?! hg3 16.hg3 dc4 17.dc4 Ne5+–) 15...hg3 (15...dc4 16.dc4 0–0–0 17.0–0–0+–) 16.hg3 (better is 16.Qg3!? dc4 17.dc4 Qh4+–) 16...Rh2 17.0–0–0 Ne5 18.Ncd5! cd5 19.Qd5 Rb2 20.Kb2 Nd3 (20...Nc4 21.Kb3 Qb2 22.Kc4 Rc8 23.Kb5 Rc6 24.Qc6 bc6 25.Kc6 Ne7 26.Kb5 g5+/–) 21.Kc2 (better is 21.Kb3 Qb2 22.Ka4+–) 21...Qb2 22.Kd3 Rd8 23.Qd8! Kd8 24.Ke4 Kc8 25.Rd3 (25.Nd5!? Nh6 26.Kf3+/–) 25...g5+= 26.Rfd1 Nf6 27.Kf5 gf4 28.gf4 a6 29.e4 Kb8 30.e5 Nh5 31.Kg5 Ng7 32.Kf6 Nh5 33.Kf7 Nf4 34.Rd8 Ka7 35.e6 Qf2 (35...Qe5 36.R1d6 Qf5 37.Ke7 Qh7 38.Kf6 Qg6 39.Ke5 Qg5 40.Ke4 Ne6–+) 36.e7 Nh5 37.Ke6?? (better is 37.Kg6 Nf4 38.Kg7 Qg3 39.Kf8 Ne6 40.Kf7 Ng5 41.Ke8=) 37...Qf6–+ 38.Kd7 (38.Kd5 Qe7 39.Rc8–+) 38...Qc6 0–1. Fournier,Frederic – Chalvet,Philippe, Partie Libre (Active), 1994.

4.a4 Be7?? 5.Bg7+– Bf6 6.Bh8 Bh8 7.c3 Be6 8.Qh5 (8.d4 a5+–) 8...h6 (8...Nf6 9.Qd1+–) 9.d3 Nd7 10.d4 Ndf6 11.Qd1 Ne7 12.Nd2 a6 13.b5 a5 14.f3 (14.c4 Bg7+–) 14...Nf5 15.Qe2 b6 16.0–0–0 Qd6 17.Nb1 c5 18.g4 Ne7 19.Kc2 (19.h3!? Rc8+–) 19...cd4 (19...ef3!? 20.Nf3 Bg4+=) 20.ed4+/- (20.cd4 Rc8 21.Kb3 Qb4 22.Ka2 Qa4 23.Kb2 Ng4–+; 20.Rd4?! ef3 21.Qf3 Nd7+/-) 20...Rc8 21.Qd2 Qb4 22.Qh6 Qa4 23.Kc1 Kd7 24.g5?? Qa1?? 25.Kd2?? e3?? 26.Ke2?? Qb2–+ 27.Ke3?? Nf5 (27...Nf5 28.Kd3 Nh6 29.gh6 Bf5 30.Ke3 Re8 31.Kf4 Bc2 32.Bh3 Kd8–+) 0–1. Baer,Cy (1895) – Briceno,Jose (1930), CiF, 2007.

4.a4 Nf6 5.b5 (--> 3.e3 Nf6 4.b5 d5 5.a4).

4.b5 Bb4?? 5.Bg7 Be6 6.Ne2 Be7 7.Nf4 Bf6 8.Ne6 fe6 9.Bh8 Bh8 10.c3 Nd7? 11.Be2 Qg5 12.0–0 Be5 13.Bh5 Ke7 14.Qg4 Qg4 15.Bg4+– Ngf6 16.Bh3 Rg8 17.f4 Bd6 18.a4 Nc5 19.c4! Nd3 20.Nc3 h5 21.f5 Ng4? 22.Bg4 hg4 23.fe6 Ke6? 24.Nd5 Be5 25.Rab1 Rh8 26.g3 Nc5 27.Nf4 Bf4 28.Rf4 Rg8 29.Rbf1 Rg7 30.a5 Nb3 31.R1f2 Nc5 32.Rf8 Nd7 33.Re8 Kd6 34.Re4 Ne5 35.Rd4 Ke6 36.Re4 Kd6 37.Rd4 Ke6 38.Kg2 Nf3 39.Re4 Kd6 40.d4 b6 41.a6 c6 42.bc6 Kc6 43.Rb2 Ne1 44.Kf1 Nf3 45.Kg2 ½–½. gtate (1810) – felippe (2000), net–chess.com, 2002.

4.b5 c5 5.c4 d4 6.ed4 cd4 7.Ne2 Bg4 (better is 7...Bc5+=) 8.Bd4?? (better is 8.h3 Be2 9.Qe2+=) 8...Be2–+ 9.Qe2 Qd4 10.Nc3 Bb4?? (10...f5 11.Qe3 Bc5 12.Be2–+) 11.Rd1?? (better is 11.Qe4 Qe4 12.Ne4–/+) 11...Nf6 12.f3 Bc3 13.dc3 Qc3 14.Kf2 0–0 15.fe4 Re8 16.g3 (16.Qf3 a6 (16...Ne4?! 17.Qe4 Nc6 18.Qd3–/+) 17.Kg1 Qb4–+ (17...Ne4?! 18.Qe4 Nc6 19.Qf3 Qf3 20.gf3 ab5 21.cb5–/+)) 16...Nbd7 (16...Ne4?! 17.Qe4 Nc6 18.Qd3 Qf6 19.Qf3 Qb2 20.Kg1=) 17.Bg2 Nc5 18.e5 (18.Rhe1–+) 18...Re5 19.Qf1 (19.Qf3 Nce4 20.Kg1 Qc4 21.h3–+) 19...Qe3 0–1. GuestNBSG – GuestFSHH, freechess.org, 2017.

4.b5 Bd6 5.Bg7 Nh6 6.Bh8 (6.Bh6?! Qf6 7.Nc3 Qh6 8.Nd5 Be6+/–) 6...Qg5 (6...Bg4 7.Be2 Be6 8.d3+–) 7.h4 (7.Nc3 Bg4 8.Nge2 f6+–) 7...Qf5 (7...Qg8 8.Bb2+–) 8.Bd4 (8.Nc3 Be6+–) 8...Ng4 9.Nh3 c5 10.bc6! Nc6 11.Bb2 Be6 0–1. pcmvr (2245) – michelleke (2260), net–chess.com, 2006.

4.b5 Qd7 5.a4 (5.c4 dc4 6.Bc4 a6=) 5...Qd6 6.Nc3 Nf6 7.Nge2 Bg4 8.h3 Bh5 (8...Be6 9.Nd4=) 9.g4 Bg6 10.Nf4 Nbd7 (10...c6!?=) 11.g5+= (worse is 11.Ng6 hg6 12.a5 g5=) 11...Ng8 12.Ncd5 Ne7 13.Nc3 0–0–0 (13...h6 14.Bg2 hg5 15.Ba3+/–) 14.a5 (14.Bg2 h6+–) 14...h6 (14...Ne5 15.Bg2 Nf3 16.Bf3 ef3 17.Ba3+–) 15.gh6 (15.b6 a6+/–) 15...Rh6 16.a6 (16.b6 ab6 17.Nb5 Qc5+/–) 16...b6 17.Bg2 Nf6 (17...f5 18.f3+/–) 18.Ra4 (18.Ng6 Rg6 19.Ne4 Qd5+–) 18...Bf5 (18...Qc5 A) 19.Be4?! A1) worse is 19...Ne4 20.Ng6 (20.Ne4 Qb5 21.Ng6 Qa4 22.Qg4 Kb8 23.Nf8 Qc2 24.Nd7 Ka8 25.Bg7 Rg6–/+) 20...Nc3 21.Ne7 Be7 22.Bc3+/–; A2) 19...Be4 20.Ne4 Qb5+=; B) 19.Ba3 Qf5 20.Be4 Ne4 21.Re4+– (21.Ne4?! Qb5 22.Nc3 Qc6+=)) 19.Ne4 (19.Rd4 Qc5 20.Nd3 Qd4 21.ed4 ed3+/–) 19...Ne4+/– 20.Be4 (worse is 20.Re4 Be4 21.Be4 Qb4+=) 20...Be4 (20...Qc5 21.Bb7 Kb8 22.c4+/–) 21.Re4 g5 (21...Qd7 22.Qe2+–) 22.Rd4+– Qc5 23.Qg4 (23.Qf3 Rd4 24.Bd4 Qb5 25.Qa8 Kd7 26.Qf8 Rc6+–) 23...Qf5? (better is 23...f5!? 24.Rd8 Kd8 25.Qg5 Qc2+–) 24.Qf5+– Nf5 25.Rd8 Kd8 26.Nd5 g4 (26...Ne7 27.Bf6 Kd7 28.Bg5 Nd5 29.Bh6 Bh6 30.c4+–) 27.h4! Nd6 (27...Nh4 28.Bf6 Double attack (28.Bf6 Decoy); 27...Rh4 28.Bf6 Double attack (28.Bf6 Decoy)) 28.Nf6 White prepares h5 (28.h5 Nb5 29.Nf6 Na3 30.Ba3 Ba3 31.Ng4 Rh8+–) 28...Bg7 (28...Be7 29.Ng4 Rh4 30.Rh4 Bh4 31.Ne5 Nb5 32.Nf7 Ke8 33.c4+–) 29.Ng4 Rg6 30.Ne5 (30.Bg7 Rg4 31.Bf6 Ke8+–) 30...Be5 31.Be5 Nb5 32.h5 Rh6 33.f4 (33.Ke2 c6+–) 33...c5 (33...f6 34.Bb2+–) 34.f5 f6 (34...Nc7 35.Bf4 Rh7 36.Bc7 Kc7 37.d4+–) 35.Bf4 Rh7 36.h6 Nc7 (36...Na3 37.Kd1 c4 38.Rg1+–) 37.Bc7 (37.Rg1!? Ne8+–) 37...Kc7 38.c4 (38.Ke2 b5+–) 38...Kc6 (38...b5 39.cb5 Kb6 40.Ke2+–) 39.d4 (better is 39.Ke2 b5+–) 39...cd4 (39...b5 40.d5 Kb6 41.cb5 Kb5 42.Kd2+–) 40.ed4 Kd6 (40...b5 41.c5+–) 41.Kd2 (41.Ke2 Kc6+–) 41...Kc6 42.Kd3 (42.Kc3 Kd6+–) 42...b5 (42...Kd6 43.Ke4+–) 43.c5 Kd5 44.Kc3 Kc6 (44...b4 45.Kb4 Kd4 46.Rd1 Ke5 47.c6+–) 45.Kb4 Rh8 (45...Rd7 46.Rh4 Rh7 47.Rh5+–) 46.h7 Kc7 (46...Kd5 47.Rh4+–) 47.Kb5 1–0. Wall,Bill – Everett, internet, 2000.

4.b5 Nd7 5.c4 dc4 6.Nc3 Nc5 7.Bc4 Be6 8.Be6 fe6 9.Nge2? Nd3–+ 10.Kf1 Qf6 11.Ne4 Qb2 12.N4c3 Qb4 13.Rb1 Qh4 14.g3 Qh3 15.Kg1 Nf6 16.Qb3 0–0–0 17.Nf4 Nf4 18.ef4 Rd2 (18...Rd2 19.Qc4 Nd5–+) 0–1. bayonett_attack_1 – marekt, ChessWorld.net, 2003.

4.b5 Be6 5.a4 a6 6.c4 (6.Ne2!?+=) 6...dc4–/+ 7.Qc2 ab5 8.ab5 Ra1 9.Ba1 Qg5 10.Qa4 Ne7?? (10...Bd6!?–/+) 11.Nc3 (11.Qa8 Qb5 12.Qb8 Kd7–/+) 11...c6 (11...Nc8 12.Qa8 Qc5 13.Qb8=) 12.Qa8 (12.Ne4 A) 12...cb5? 13.Qa8 (13.Ng5?! ba4 14.Ne6 fe6+=) 13...Qd5 14.Qb8 Nc8 15.f3+–; B) 12...Qd5 13.Qc4 Qd8+/–) 12...Qe5 13.Qb7 (13.b6 f6+=) 13...Bc8= 14.Qb6 Nd5 15.Qa5 Bb4? (better is 15...Nb4 16.Bc4 Nc2 17.Kd1 Na3+=) 16.Nd5+– Bd2 17.Kd2 Qd5 18.Kc1 0–0 (better is 18...cb5 19.Bg7 Rg8+/–) 19.Bc3?? (better is 19.Qc3 Qg5 20.h4+–) 19...cb5= 20.Ne2 Nc6 21.Qa2 (better is 21.Qb6!? Bd7 22.Nd4=) 21...b4 22.Bd4 Bg4 (22...Nd4!? 23.Nd4 Bd7+=) 23.Nf4= Qf5 24.Qc4 Nd4 25.Qd4 Rc8 (25...Qa5 26.Bc4 Ra8+/–) 26.Kb2 (26.Kb1!? Qa5 27.Bc4+/– (27.Qe4 b3 28.Qh7 Kh7 29.Bd3 Kh6 30.Bc4 Qa2 31.Kc1 Rc4)) 26...Qa5= 27.Bc4 Qa3 28.Kb1 b3 29.Bb3?? (better is 29.Qb2 Qb2 30.Kb2 Rc4 31.h3=) 29...Qb3 (better is 29...Rb8 30.Qc3 Rb3 (30...Qb3?! 31.Qb3 Rb3 32.Kc2=) 31.Qb3 Qb3 32.Kc1 Qa2–+) 30.Qb2 Qb2?? (better is 30...Qa4 31.Rc1 Ra8–+) 31.Kb2+= Rb8 (31...Rd8 32.h3 g5 33.hg4 gf4 34.ef4 Rd2 35.Kc3 Rf2 36.g3 Rf3 37.Kd4 Rg3 38.g5=) 32.Kc3=. Huelle,Gunter (1840) – Pantusenko,Valeria, Leipzig VfB op, 2007.

4.b5 Nf6 (--> 1.b4 e5 2.Bb2 e4 3.e3 Nf6 4.b5 d5).

4.b5 Qg5 5.Ne2 Nf6 6.Ng3 h5 7.Bf6 Qf6 8.Nc3 Qe5 9.f4 ef3 10.Qf3 Bb4 11.Nge2 Be6 12.Qf4 Bc3 13.Nc3 Qf4 14.ef4 d4 15.Ne4 Bd5 16.Bd3 a6 17.c4+= Be6 18.Nc5 Nd7= 19.Ne6 fe6 20.Ke2 Rf8 21.g3 e5 22.fe5 Ne5 23.Rhf1 ab5 24.cb5 Ra3 25.Rf8 Kf8 26.Be4 d3 27.Ke3 Ng4 28.Kf3 Nh2 29.Kg2 Ng4 30.Bb7 Ke7 31.Bf3 Ne5 32.Bh5 Kd6 33.Be8 ½–½. Woischke,Norbert – Krasny,Henryk Jan, TKM/SF/01, 2001.

4.Bb5 c6 5.Ba4 Nf6 6.b5=+ Bd6 7.bc6 Nc6 8.Ne2 0–0 9.Nd4 Nd4 10.Bd4 a6 11.d3 Bg4 12.Qd2 b5 13.Bb3 Rc8 14.0–0 Qd7 15.de4 Ne4 16.Qd3 Bf5 17.Qe2 Qc7 18.g3 Qd7 19.f3 Nc5 20.Nd2 Nb3 21.cb3 Bh3 22.Rf2 Rfe8 23.Qd3 Qc7 24.e4 Bg3?? 25.Re2?? Bf4 26.Nf1 Qe7 27.Rae1 Qg5 28.Kh1 de4 29.fe4 Rcd8 30.Qh3 Rd4 31.Ng3 Bg3 32.Qg3 Qg3 (32...Qg3 33.hg3 Re5–+) 0–1. ida1 – SoulessTeenWitch, Live Game Caissa's Web, 2005.

4.c4 c5 5.cd5 (5.bc5 Na6 6.d4 ed3 7.cd5 Qd5 8.Bd3 Qc5+=) 5...Qd5 (5...cb4!? 6.Qa4 Bd7=) 6.Nc3+= Qf5 (6...Qe6 7.bc5 Nd7 8.Qa4+/–) 7.Nb5+/– Na6?? (better is 7...Kd8 8.bc5 Nf6+/–) 8.Bg7!+– Bg7 9.Nd6 Ke7 10.Nf5 Bf5 11.Ba6 Ba1 1–0. DEFFM – GuestCWZK, freechess.org, 2017.

4.c4 f6 5.cd5 Qd5 6.Nc3 Qe5 7.f4 Qe6= 8.Nge2 Bb4 9.Nd4 Qd7 10.Ne4 b6 11.Bc4+/– Bb7 12.Qf3 c5? 13.Bb5+– Bc6 14.Nc6 Nc6 15.Nf6! Nf6 16.Bc6 0–0 17.Bd7 Nd7 18.Qd5 (18.Qd5 Kh8 19.Qd7+–) 1–0. xadrezpg – bonaparte (2380), net–chess.com, 2010.

4.d3 ed3 5.Bd3 Bb4–/+ 6.Bc3 Qd6 7.a3 Bc3–/+ 8.Nc3 Nf6 9.Nf3 0–0 10.0–0 Bg4 11.Re1 Nc6 12.e4 d4 13.Nd5 Nd5–+ 14.ed5 Qd5 15.h4? Na5 16.Bh7? Kh7 17.Ng5 Kg8 18.Qg4=+ Nc4 19.Qh5+= Qf5 20.g4 Qg6= 21.Qg6 fg6 22.Ne6 Rf7 23.Nd4 Nd2 24.Rad1 Nc4 25.a4 c5 26.Nf3?? Rf3–+ 27.Re7 b6 28.Rdd7 Raf8?? 29.Rg7 Kh8 30.Rh7 ½–½. saetta – ebern, ICS, 1999.

4.d3 f5 5.de4 fe4 6.c4 c6 7.Qh5+= Kd7 8.c5 Nf6= 9.Qf5 Ke7 10.Qe5 Kf7=+ 11.Be2 Be7 12.Bh5 Nh5 13.Qh5 Kf8 14.f3 ef3 15.Nf3+= Bf6 16.Ne5 Qe8= 17.Qe8 Ke8 18.Nd2 Be5 19.Be5= Rg8 20.0–0 Nd7 21.Bd6 Nf6 22.Rf4 Be6= 23.Raf1 Kf7 24.e4 Ke8+= 25.e5 Nd7 26.Nf3 h6?? 27.Nd4+– g5 28.R4f2 Bg4 29.h3 Be6 30.Ne6 Rc8 31.Nc7 Rc7+– 32.e6 Rf8 33.ed7 Kd7 34.Rf8 Rc8 35.R8f7 Ke8 36.Re7 (36.Re7 Kd8 37.Rf8#) 1–0. Istvanny (1675) – bonka_z, internet, 2007.

4.d3 Bf5 5.Be2 f6 6.c4 ed3 7.Bd3=+ Bd3 8.Qd3 dc4 9.Qc4 Nc6 10.Nf3 Nb4 11.Ba3 Nd3 (11...Nd3 12.Ke2 Ne5 13.Ne5 fe5=). targab (2000) – johnnye, net–chess.com, 2001.

4.d3 Nf6 5.a3 (--> 4.a3 Nf6 5.d3).

4.d4 Bb4!? 5.c3 Be7 –/+.

4.d4 f5 5.c3 Nf6 6.Be2 Bd6 7.Nh3 0–0 8.0–0 h6 (8...Nc6 9.Nd2+=) 9.f4 (9.Nf4!?=) 9...a5 10.ba5 (10.b5 Be6+=) 10...Ra5 (better is 10...Nc6–/+) 11.Na3?? (11.c4 Nc6+=) 11...b6 (better is 11...Ba3 12.Ba3 Ra3–+) 12.Nc2 c5 (12...Nbd7!?–/+) 13.dc5 bc5 14.a4 (14.c4 Be7 15.Bc3 Ra7–/+) 14...Bd7 (14...Nc6–/+) 15.Ne1? (15.c4!? d4 16.ed4=) 15...Qe8 (15...Qb6!? 16.Qd2 Ba4–+) 16.Qd2 Ra4 (16...Ba4?! 17.c4 Nc6 18.cd5+=) 17.Ra4 Ba4 18.g3 (better is 18.c4 d4 19.ed4–/+) 18...Bb5?? (18...Nc6 19.c4 d4 20.ed4 Nd4 21.Ng2–+) 19.Bb5? (better is 19.c4 Ba6 20.Bf6 Rf6 21.Qd5 Kh8 22.Nc2–/+) 19...Qb5–+ 20.Nc2?? (20.Ng2–+) 20...Qb2 21.Nf2 Nc6 22.Rd1 (22.Ra1 Bc7–+) 22...Ra8 23.Qc1 (23.Ne1 Qd2 24.Rd2 d4–+) 23...Qc1 (better is 23...Qc3 24.Ne1 Qb3 25.Ng2–+) 24.Rc1 Ra4 (24...Ra2 25.h3–+) 25.Kf1 (25.h3 Bc7–+) 25...d4 (25...Ra2 26.Ne1–+) 26.cd4 (26.ed4 cd4 27.Nd4 Nd4 28.cd4 Rd4–+) 26...cd4 (26...Rc4 27.Ke2 cd4 28.Kd1–+) 27.ed4 (27.Nd4 Nd4 28.ed4 Rd4–+) 27...Nd4 (27...Rc4!? 28.Ke1–+) 28.Nd4 Rd4 29.Ke2 Kf7 30.Nd1 Ng4 31.h3 Nh2 32.Ne3 g6 33.Rc8 (33.Nc4 Nf3 34.Nd6 Rd6–+) 33...Nf3 34.Rc2 (34.Nc4 Bb4 35.Rc6 Rd3–+) 34...Kf6 (34...Rd3 35.Kf2–+) 35.g4 (35.Kf2 Ke6–+) 35...Bf4 (35...Bf4 36.gf5 Ng1 37.Kf2 Nh3 38.Ke2 gf5–+) 0–1. Benavides,Carlos (1975) – Fernandez Ballon,Armel (2340), CiF, 2006.

4.d4 Nf6 5.Be2 h5 6.b5 Bb4 7.Nc3 0–0 8.f3 c6 9.fe4?? Ne4–+ 10.Qd3 cb5 11.Nf3? Bg4 12.0–0=+ Bc3 13.Bc3 Nc3 14.Qc3 Nc6 15.Qe1 Qd6 16.h3 Bf3=+ 17.Bf3 Nb4 18.Qf2 Rac8=+ 19.Bh5 Rc7 20.c3= Nd3? 21.Qf5?? Rc3?? 22.Bf7+– Rf7?? 23.Qf7 Kh8 24.Qe8 Kh7 25.Qh5 Qh6 26.Qh6 gh6 27.Rf5 (27.Rf5 Nb4 28.Rf7 Kg6 29.Rb7+–; 27.Rf7!? Kg8 28.Rd7 Nb4+–) 1–0. TriAngel – nestor, ICC, 1999.

4.d4 g5 5.b5 f5 6.Qh5+/– Ke7 7.Qg5 Nf6 8.c4 dc4 9.Bc4 h6?? 10.Ba3+– c5 11.Bc5 Kd7 12.Qf5 Kc7 13.Qf4 Bd6 14.Bd6 Qd6 15.Qd6 Kd6 16.Ne2 Nbd7 17.Nbc3 Re8 18.0–0 Nc5 19.dc5 Kc5 20.Nd5! Kc4 21.Nf6 Re6 22.Rfc1 Kd3 23.Ng3 Rf6+– 24.Rd1 Kc2 25.Ne4 Rb6 26.a4 Bg4 27.Rd2 Kb3 28.Nc5 Kc3 29.Ne4 Kc4?? 30.Rd4 Kb3 31.Nd2 Kc3 32.Nb1 Kb2 33.Ra3 Rc8 34.Rb4 Kc2 35.Ra2 Kd3 36.Rb3 Ke4 37.f3 Bf3 38.gf3 Kf3 39.Nd2 Kg4 40.Rb4 Kh3 41.Ra3 Rc1 42.Nf1 Rg6–+ 43.Kf2 Rf6 44.Ke2 Rff1 45.Rf4 (45.Rf4 Rf4 46.ef4 Kg4 47.h3 Kf4 48.Rf3 Ke5 49.Rf7+=). gtate (1925) – clemyp, net–chess.com, 2004.

4.Be2 c6 5.d4? (5.a3 Qg5 6.g3 Nf6+=) 5...Nf6 (better is 5...Qg5!? 6.Bf1 Bb4 7.c3 Ba5–/+) 6.a3+= Bd6 7.c4 Be6 (7...dc4 8.Bc4 0–0 9.Nd2+=) 8.c5 Bc7 9.Nc3 0–0 10.f3 (10.b5 cb5 11.Nb5 Ba5 12.Kf1 Nc6+=) 10...b6 (10...Re8 11.Qd2+=) 11.Qc2 (11.Qa4 b5 12.Qb3 a5+=) 11...Bf5 12.f4 h6 (12...Re8 13.h3+=) 13.b5 (13.Rc1 b5+=) 13...bc5 14.dc5 Ba5 15.bc6 Nc6 16.Bb5 Ne7 (16...Rc8 17.Nge2 d4 18.Rd1 dc3 19.Rd8 cb2 20.Rd2–+) 17.Nge2 (17.Kf1 Rb8 18.a4 d4 19.ed4 e3–/+ (worse is 19...Qd4 20.Nce2 Qe3 21.Bd4+=)) 17...a6 18.Ba4 Rc8 19.c6 (better is 19.Nd4 Rc5 20.Nb3–/+) 19...Nc6 (19...Ng4 20.Qd2 A) 20...Nc6 21.Bc6 Bb6 A1) 22.Qd5? Ne3 23.Qd8 Rfd8–+ (worse is 23...Bd8 24.Be4 Be4 25.Ne4+/–); A2) 22.Nd4 Bd4 23.Qd4 Rc6 24.Nd5=; B) 20...Qb6–+) 20.Bc6= Rc6 21.a4?? (21.Nd4 Rc7 22.Nf5–/+) 21...Qb6 (better is 21...Ng4 22.Nd4 Ne3–+) 22.Ba3?? (22.Nd4 Rfc8 23.Ra3 Rc3 24.Bc3–+) 22...Rfc8 (better is 22...Bc3!? 23.Nc3 Qe3 24.Kf1 Rc3 25.Bc1–+) 23.Bb2 Qe3 24.Bc1 (24.Qc1 Bc3 25.Bc3 Rc3 26.Qe3 Re3–+) 24...Bc3 25.Kd1 (25.Qc3 Qe2! 26.Ke2 Rc3–+) 25...Qd3 (better is 25...Ba1 26.Be3 Rc2 27.h3–+) 26.Qd3 ed3 27.Ng3 (27.Nc3 Bg4 28.Ke1 Rc3 29.Bd2–+) 27...Ba1 (27...Bg4 28.Ne2 Be2) 28.Nf5–+ Rc1 29.Kd2 R8c2 30.Kd3 Rc3 31.Kd2 (31.Ke2 R1c2 32.Ke1 Rg2 33.Ne3 Rc1 34.Nd1 Ra2 35.Rg1 Bc3 36.Kf1 Rd1) 31...Rh1 (31...Ne4 32.Ke2 R1c2 33.Ke1 Rd2 34.Ne7 Kh7 35.Nd5 Rc1) 32.Ng3 Rh2 33.Ne2 (33.Ke2 Rg2 34.Kf1 Rcg3 35.f5 Ne4 36.Ke1 Rf2 37.a5 Rg1) 33...Rg2 (33...Ne4 34.Kd1 Rh1 35.Ng1 Rg1 36.Ke2 d4 37.g4 Re3) 34.Kd1 (34.a5 Ne4 35.Ke1 Rb3 36.Kd1 Rb1 37.Kc2 Re2 38.Kb1 Nc3 39.Ka1 Ra2) 34...Re3 35.Ng1 (35.Nc1 Bc3 36.Nd3 Rd3 37.Kc1 Rdd2 38.a5 Rg1) 35...Rg1 (35...Bc3 36.Nf3 Rf3 37.a5 Rf1) 36.Kd2 Rc3 (36...d4 37.Kc2 Ne4 38.a5 Rc3) 37.f5 (37.Ke2 Rg2 38.Kd1 Bb2 39.a5 Rc1) 37...Rg2 38.Kd1 Bb2 39.a5 Rc1 0–1. Datelova,Daniela – Subjakova,Kristina, Majstrovstva SR Mladeze – Dievcata do, 2014.

4.Be2 Nf6 5.f3 Bb4–/+ 6.fe4 0–0 7.c3 Be7 8.ed5 Nd5 9.e4 Nb6 10.d4 N8d7 11.Nf3 Nf6 12.0–0 Ne4–/+ 13.Bd3 Nf6 14.Nbd2 Bg4 15.h3 Bh5 16.g4 Bg6–/+ 17.Ne5 Bd3 18.Nd3 Qd6 19.Qf3 c6 20.c4 Qc7 21.d5 cd5–+ 22.cd5 Nbd5 23.Bf6 Bf6 24.Qd5? Ba1 25.Ra1 Rad8 26.Qf3 Qc3 (26...Qc3 27.Rc1 Qd3 28.Qd3 Rd3–+) 0–1. yannigator (1915) – gfry (2000), net–chess.com, 2010.

4.Be2 Qg5 5.Bf1 (5.g3 Bb4 6.a3–/+) 5...Bb4 6.Nc3 –/+.

4.Ne2 c6 5.Ng3 b5 (5...Nf6 6.Nh5=+) 6.Be2 (6.a4 A) 6...Bb4 7.Bg7 (7.ab5?! Nf6=) 7...Qh4 8.Bh8+–; B) 6...ba4 7.Ra4 Nd7=) 6...Nf6 (6...Bb4?? 7.Bg7 Nf6 8.Bh8+–) 7.0–0 (7.a4!?=) 7...Bb4–/+ 8.Nh5 (8.a4!?–/+) 8...Nh5 9.Bh5 0–0 10.Bg4 Qg5 11.Bc8 Rc8 12.f4 Qd8 (12...Qf5 13.a4–+) 13.Qg4 Bf8 14.f5 f6 15.Rf4 (15.d3 Bc5–/+) 15...Bd6–+ 16.Rf2 Nd7 17.Nc3 Ne5 18.Qh3 Nc4 19.Bc1? (better is 19.Nd1–+) 19...Be5 20.a3 (20.Rb1 Bc3 21.dc3 Qa5–+) 20...Qd6 (better is 20...d4!? 21.ed4 Qd4 22.Rb1–+) 21.Rb1 Bc3 22.dc3 Na3 23.Ra1 Nc4 24.Rf4 (24.Ra6 Rcb8–+) 24...Qe5 25.Rh4 (25.Ra2–+) 25…Qc3 0–1. Wolfram,R – Szabo,M, corr SOK–89–49, 1989.

4.Ne2 Nc6 5.a3 Nf6 6.Ng3 Bd6 7.Be2 Bg3 8.hg3 Be6 9.d3 Qd7 10.Nd2 0–0–0 11.Rc1 a6 12.Nb3 a5 13.b5 Na7 14.a4 b6 15.Nd4 c5 16.bc6 Nc6 17.Nb5 Ng4 18.de4 de4 19.Qd7 Rd7 20.Rh4 f5 21.c4 Nce5 22.c5 g5?? 23.Rh5 Kb7?? 24.Nd6 Kb8 25.Rg5 bc5 26.Nf5?? Bf5? 27.Rf5 Rf7 28.Be5 Ne5 29.Re5 1–0. bratek55 (1660) – j1a9n55, kurnik, 2011.

4.Be5 Nc6 5.Bc3 Nb4 6.Ne2 –/+.

4.Be5 Qe7 5.Bg3 Qb4 6.Bc7 Qc5 7.Be5 Nc6 8.Bg3 Nf6 9.c3 Be7 10.Qb3 0–0 11.Be2 b6 12.d4 ed3 13.Bd3 Be6 14.Ne2 d4 15.Qc2 de3–+ 16.fe3 Qe3 17.Bf2 Qg5 18.0–0 Bh3 19.Ng3 Be6 20.Be4?? Rac8 21.Nd2 Bc5 22.Nf3 Bf2 23.Kf2?? Qc5 24.Ke2 Bc4 25.Bd3 Nb4 26.cb4 Bd3 27.Qd3=+ Rfe8 28.Ne5?? Qe5–+ 29.Kf2 Rc3 30.Qe2 Qd4 31.Ke1 Re2 (32.Ne2 Re3–+; 31...Rc2 32.Qe8 Ne8 33.Ne2 Qd2 34.Kf2 Qe2 35.Kg3 g5 36.Rf2 Qf2 37.Kg4 Qf4 38.Kh5 Qh4#) 0–1. pinecrest1981 – visio2003, Live Game Caissa's Web, 2005.

4.f3 Bb4 5.Bg7 Nf6 6.Bh8 c5 7.Bf6 Qf6 8.c3 Ba5 9.Bb5 Kf8 10.f4 a6 11.Be2 Nc6 12.Bg4 Ne7?? 13.Bc8+– Rc8 14.Qh5 Kg8 15.Ne2 b5 16.0–0 b4 17.cb4 Bb4 18.Nbc3 Bc3 19.dc3 d4 20.cd4 cd4 21.Nd4 Rd8 22.Qg5 Qg5 23.fg5 Nd5 24.Nf5 h6 25.Rad1 hg5 26.Ne7! Ne7 27.Rd8 Kg7 28.Rd7 Ng6 29.Rff7 Kg8 30.Rg7 Kf8 31.Rg6 Ke8 32.Ra7 Kf8 33.Rb6 Ke8 34.Rb8# 1–0. grower – Fingerly, Live Game Caissa's Web, 2005.

4.f3 Bd6?? 5.Bg7+– Qh4 6.Ke2 ef3 (6...Nc6 7.Bh8 Nb4 8.Nc3+–) 7.Nf3 Bg4 (7...Qb4 8.Bh8 Nd7 9.Nc3+–) 8.Qe1 (8.Bh8 Ne7+–) 8...Bf3 9.gf3 Qc4 (9...Qb4 10.Bh8 Ne7 11.Nc3+–) 10.d3 (better is 10.Kd1!? Qb4 11.Bh8 Nd7+–) 10...Qc2 11.Qd2 Qd2 12.Kd2 (12.Nd2 Nc6 13.Bh8 Nb4+–) 12...Bb4 13.Ke2 f6 (13...Nf6 14.Bh8 (14.Bf6?! Rg8+–) 14...Ke7 15.d4+–) 14.Bh8 Kf7 15.Nd2 (better is 15.Rg1 Bf8 16.Bh3 Ne7+–) 15...Bc3?? (15...Ne7+–) 16.Rc1 d4 (16...Ne7 17.Rg1 Ng6 18.Rc3+–) 17.ed4 (better is 17.Rg1 Ne7 18.Ne4 Nd5+–) 17...Bd4 18.Rc7 Kf8 (18...Ne7+–) 19.Nc4 (19.Rh7 Nc6 20.Rb7 Nge7+–) 19...Nc6 (19...Ne7 20.Rb7 Nbc6 21.Bg2+–) 20.Rb7 (better is 20.Bg7!? Ke8+–) 20...Re8 21.Kd2 (21.Kd1 Re7 22.Rb5 h6+–) 21...Ne5 (21...Re7 22.Rb5 Rc7+–) 22.Bg7 1–0. ronnieg (2550) – Koda (2765), freechess.org, 2001.

4.f3 f5 5.fe4+= Qh4 6.g3 Qe4 7.Nf3 (7.Qh5 Kd8 8.Nf3 Nc6=) 7...Qb4 8.Bd3?? (better is 8.Bd4+=) 8...Qb2–+ 9.Nc3 c6 10.0–0 (10.Nd4 g6–+) 10...Bd6 (10...Qa3 11.Nb1 Qa5 12.Nd4–+) 11.Rb1 (11.Nd4 g6 12.a3 Qb6–+) 11...Qa3 12.Rb3 (12.Ng5 Ne7 13.Qh5 g6–+) 12...Qa5 13.Nd4 (13.Ng5 Ne7 14.Qh5 g6–+) 13...Ne7 (13...g6 14.Bf5 Bf5 15.Nf5 gf5 16.Qh5 Kd7 17.Rb7 Kc8 18.Qf7–+) 14.Bf5 Nf5 15.Nf5 Bf5 16.Rf5 Qc7 17.Ne2? (17.e4 g6 18.Rf1–+) 17...Nd7 18.Rf1 (18.Nd4 Nc5 19.Rb1 0–0–0–+) 18...Nc5 19.Rb1 0–0–0 20.Qe1 (20.c3 h5 21.Nf4 g5–+) 20...Rdf8 21.Nf4 (21.Nc3 Qd7–+) 21...g5 22.d4 (22.Nh3 h6 23.Qe2–+) 22...gf4 23.dc5 Bc5 24.Kg2 (24.gf4 Qe7 25.Qe2 Be3 26.Kh1 Rhg8–+) 24...fe3 25.Qe2 Qe7 26.Rg1 Rf2 0–1. Hasler,Ueli (1710) – Fernandez Ballon,Armel (2340), CiF, 2006.

4.f4 Nh6 5.a3 Bg4 6.Be2 Be2 7.Qe2 c6 8.Qh5 Nd7 9.g4 Qe7 10.h3 a5 11.b5 Qc5 12.Nc3 Nb6 13.Ra2 Nc4 14.Ba1 (better is 14.bc6 bc6 15.Ne4=) 14...0–0–0?? (better is 14...Na3!? 15.bc6 bc6 16.Qe5 Kd7-/+) 15.Nge2 (15.g5 Ng8 16.Qf7 Qe7+=) 15...Rd7 16.Nd4 Qd6 (16...Na3 17.Na4 Qa7 18.bc6 bc6 19.Ne6=) 17.bc6 bc6 18.Ke2 (18.g5 Ng8 19.Qe2 c5+=) 18...g6 19.Qh4 Bg7 (19...Na3 20.Ra3 g5 21.fg5 Qa3 22.gh6+–) 20.Na4 Re8 21.Rb1 Rb7 (21...Na3? 22.Rb3 Nc4 23.Nc6 Qc6 24.Bg7+–) 22.Rb7 Kb7 23.Nb3 Ba1 24.Ra1 Ng8 25.Qh7 Qf8 26.Rb1 Kc7 (26...Kc8 27.Nd4 Kc7 28.Rb3+/-) 27.Nbc5+– Nf6? (better is 27...Kd6 28.Qh8 f6+–) 28.Rb7 Kc8 29.Qf7 Qf7 30.Rf7 Ng8 31.Ra7 Kb8 32.Rb7 Kc8 33.d3 ed3 34.cd3 (34.Kd3?! Re3 35.Kd4 Re4 36.Ne4 Kb7+=) 34...Re3 35.Kf2 (35.Kf2 Rd3 36.Rg7 (36.Nd3?! Kb7 37.Ne5 Ne5 38.fe5 Ka6+=) 36...Rh3 37.Rg8 Kc7 38.Rg7 Kd8 39.Ne6 Ke8 40.Nac5+– (40.Rg6?! Kf7 41.f5 Ra3+–)) 1–0. Ardaman,Miles (2360) – Langer,Mikhail (2270), Western States op, 2004.

4.g4 Nf6 5.g5=+ Nfd7 6.f4 h6 7.Qh5 g6 8.Qh4 Rh7 9.a3 (9.Nc3 Bg7=+) 9...Be7=+ 10.Bh3 f6?? (better is 10...Nf8 11.Bc8 Qc8=+) 11.gf6+– Nf6 (11...Bf8 12.Be6 Rf7 13.Bd5 Rf6 14.Qg3+–) 12.Bc8 Nh5 (12...Nfd7 13.Bd7 Nd7+–) 13.Qg4 Na6 (13...Rf7 14.Bb7 Nd7 15.Bd5+–) 14.Qg6 Rf7 15.Bb7 Rb8 (15...Bf6 16.Bf6 Nf6 17.Ba6 Qd6+–) 16.Bc6 Kf8 17.Qh6 Rg7 18.Qh8 Kf7 19.Qh5 Kg8 20.Bd5 (20...Qd5 21.Qd5 Rf7 22.Qh5+–) 1–0. orane (1995) – Strac55, Live Game Caissa's Web, 2004.

4.g4 Qg5!? 5.Be2 Bb4 –/+.

4.h3 Bb4?? 5.Bg7+– 1–0. bratek55 (1675) – vitovcik, kurnik, 2011.

4.h3 Nf6 5.b5 (--> 1.b4 e5 2.Bb2 e4 3.e3 Nf6 4.b5 d5 5.h3).

4.Nh3 Nf6 5.c4 (5.Nf4 Bb4 6.Bf6 gf6+=) 5...dc4 (5...Bh3 6.gh3 Bb4 7.cd5 Qd5 8.Rg1+=) 6.Bc4 Bh3 7.gh3 Nbd7 8.Rg1 Qe7 (8...Bb4?! 9.Rg7 Nb6 10.Rf7 (worse is 10.Bf7 Kf8 11.Rg4 Kf7=) 10...Nc4 11.Bf6+=) 9.a3 Ne5 (9...0–0–0 10.d4 Nb6 11.Bb3-/+) 10.Be2 (10.Qa4 c6 11.Be2 Qd6+=) 10...0–0–0 11.Nc3 (11.Qa4 Kb8-/+) 11...Qe6 12.Qa4 Kb8 (12...a6 13.b5 Nd3 14.Bd3 Rd3 15.Ne2+=) 13.Rc1 a6 14.b5 Qd6 Exerts pressure on the backward pawn (14...Qh3 15.ba6 Qh2 16.Rf1 Nd3 17.Bd3 ed3 18.Qb5+–) 15.Rd1 Ned7 (15...Nd3 16.Bd3 Qd3 17.ba6 Qa6 18.Qa6 ba6 19.Ke2=) 16.ba6= Nc5 17.Qb5 (17.Qc4 ba6 18.Na4 Nd3 19.Bd3 Qd3 (19...ed3 20.Rb1 Kc8 21.Bf6 gf6 22.Nb6 Kb8 23.Qa6 Qb6 24.Rb6 cb6 25.Qb6 Kc8 26.Qc6 Kb8 27.Rg4 Rg8 28.Qb5 Kc7 29.Rc4 Bc5 30.Qc5 Kd7 31.Rd4 Ke6 32.Re4 Kd7 33.Re7) 20.Qf7 Rd7+=) 17...Qh2+= (worse is 17...Qa6 18.Qc5 Bc5 19.Ba6 ba6 20.Rg7+/-; 17...Na6?! 18.d4+=) 18.Rf1 Qh3 (18...Na6 19.Na4 Qd6 20.d3=) 19.Na4 (19.ab7 Qd7=) 19…Qd7+= (worse is 19...Na6 20.Bf6 gf6 21.Rb1+–) ½–½. Michalek,Martin – Perlitz,Heiko, TT–10.05 ETC, 2004.

4.Nh3 Bh3 5.gh3 Nf6 6.a3 –/+.

4.h4 Bb4?? 5.Bg7 Ne7 6.Bh8 +–.

4.h4 Nf6 5.Bf6 Qf6 6.c3 a6 7.Ne2 Nd7 8.d4 ed3 9.Qd3 Bb4 10.a3 (10.cb4 Qa1) 10...Ba5 11.Nf4? (better is 11.Qd5!? Qe5 12.Qe5 Ne5 13.Nd4=+) 11...Nc5 12.Qd4 Qd4 13.ed4 Ne4 14.Nd5 c6 15.Ne3 Nc3 16.Nd2 Ne4 17.Ra2?? (better is 17.Nec4 Bd2 18.Nd2–/+) 17...Nd2 (17...Bd2?! 18.Rd2 Nd2 19.Kd2–+) 18.Rd2 Bd2 19.Kd2 Be6 20.Bd3 0–0–0 21.Rc1 (21.Kc3 h5–+) 21...g6 (better is 21...Rd4!? 22.h5–+) 22.Nc2 b5 23.Nb4 Kb7 24.Nc6 Rc8 25.Be4–/+ Kb6 26.d5 Bd7 27.Ne5 Rc1 28.Kc1 Kc7 29.Nf7 Rf8 30.d6 Kc8 31.Ne5?? Rf6 32.Nd7 Kd7 33.f3 Kd6 34.Kb2 Ke5 35.Kb3 Kf4 36.g4 Kg3 37.h5 gh5 38.gh5 h6 39.Kb4 Kf4 40.Ka5 Kg5 41.Bg6 Rg6 42.hg6 Kg6 43.Ka6 h5 44.Kb5 h4 45.a4 h3 46.a5 h2 47.a6 h1Q 48.Kb6 Qf3 49.a7 Qa8 50.Ka6 Kf6 51.Kb6 Ke5 52.Ka6 Kd5 53.Kb6 Kd6 54.Ka6 Kc5 55.Ka5 Qa7 0–1. willi_weizenkeim – MIGUEL_A, playchess.de, 2003.

4.a3 a5

5.ba5 Ra5 6.Bc3 Ra8 7.d3 Nf6 8.Nd2 Be7 9.de4 de4 10.Bc4 0–0 11.Ne2 Na6 (11...Ba3?! 12.Bb4 Bb4 13.Ra8+=) 12.0–0 Nc5 13.Ng3 Bg4 14.Qb1 Na4 15.Nde4 Ne4 16.Ne4 Bf5 17.Rd1 Qc8 18.Bb4 c5 19.Nc5 Nc5 20.Bc5 Qc5 21.Qb7 Bc2 22.Rdc1 Qc4 23.Qe7 Rfd8 24.Qg5 Rd2 25.Qh5 h6 26.Qf3 Rad8 27.a4 Qd5 (27...Qd3!? 28.a5 Rd6–+) 28.Qd5–/+ R8d5 29.a5 Rf5 (29...Bd3 30.h4 Rd6 31.Rc7–/+) 30.f3+= Rg5 Threatening mate... how? 31.g3 Rh5 32.h4 Rf5 33.Rf1 Bb3 34.Rf2? (34.a6 Ra2 35.Ra2 Ba2 36.Rc1–/+) 34...Rd1–+ 35.Rd1 Bd1 36.Rf1 Ba4 37.Ra1 Ra5 38.Kf2 f6 39.e4 Kf7 40.h5 ½–½. Meter – Schendel,A, BdF, 1988.

5.b5 Be6 6.c4 (6.Bd4 Nf6=) 6...Nf6 (6...dc4!? 7.Qc2 Qd5–/+) 7.cd5+= Nd5 8.d3 Nf6 9.Nc3 ed3 10.Bd3 Nbd7 11.Qe2 (11.Nf3 Nc5 12.Bc2 Qd1 13.Rd1 Rd8+=) 11...Ne5 12.Rd1 Nd3 13.Rd3 Qc8 (13...Bd6 14.Qf3 Bc4 15.Rd4+/–) 14.Qd1 Be7 15.Nge2 0–0 16.Nf4 Bc4 17.Rd4 (17.Ncd5 Nd5 18.Nd5 Bd8+=) 17...Rd8 18.Ncd5 Bd5 19.Nd5 Nd5 20.Rd5 Qe6 21.Rd8 Rd8 22.Qc1 Qb3 ½–½. Ziese,Gerhard – Schirmer,Michael, corr SOK–92–81, 1992.

5.b5 Nf6 6.d3 Bd6 7.Nd2 ½–½.

5.b5 Qg5

6.c4 dc4 7.Nc3 Nf6 8.Qa4 ½–½.

6.Ne2 Bg4 7.h3 Qh4 8.Rg1 ½–½.

6.g3 Nf6 7.Bg2 Be7 8.f3 0–0 9.Nc3 Rd8 ½–½.

6.h3 Nf6 7.d3 Be7 8.Nd2 0–0 ½–½.

6.h4 Qf5 7.c4 dc4 8.Bc4 Qg6 9.g3 ½–½.

6.d3 Bg4

7.Ne2 Nd7 8.Nd2 Nc5 (8...Ngf6 9.h3 Bh5 10.g4 Bg6 11.Nf4 Qh4) 9.h3 Bh5 10.de4 (10.g4 ed3 11.Nf3 (11.Nf4 dc2 12.Qc2 Bg6 13.Qc3 Qd8=) 11...de2 (11...dc2 12.Qd2 Qe7 13.gh5 Nb3 14.Qc2 Na1 15.Qd1 Qc5 16.Qa1+/–) 12.Be2 A) 12...Qh6 13.gh5 Nf6 14.Rg1 Nce4 15.Nd4 Nd6 16.Qd3 Nfe4 (16...Be7 17.Nf5 Nf5 18.Qf5 c6 19.Be5 g6 20.Qf3 g5 21.Qf5 Rg8 22.c4+/–) 17.Qb3 Qf6 18.Rg2 Nc4 19.Bc4 Nc5 20.Qa2 dc4 21.Qc4 Rd8 22.Rg4+/–; B) 12...Qe7 13.gh5 Nf6=) 10...de4 11.g4 Bg6 12.Nf4 (12.Bg2 Nf6 13.Nf4+=; 12.h4 Qg4 13.Bh3 Qh5 14.Nf4 Qd1 15.Rd1 f6 16.Rg1 Bf7 17.Bf5 Ne7 18.Be4 Ne4 19.Ne4 Ng6=; 12.Ng3 Qe7=) 12...Qe7 (12...Qh6? 13.h4 f6 14.Bg2 Bd6 15.h5 Bf7 16.Ne4 Ne4 17.Be4 Bf4 18.ef4 Qf4 19.Bb7 Rd8 20.Bc6 Ke7 21.Qe2 Be6 22.Bc3+–; 12...Nf6?! 13.Be2! (13.Nf3 ef3 14.h4 Nd3 15.cd3 Qb5 16.Bf6 gf6 17.h5+/–) 13...Ne6 (13...Qh4 14.Ng2 Qh6 15.h4+–) 14.h4 Qc5 15.Nb3+–; 12...Qh4!? 13.Qe2 (13.Bc4=; 13.Bg2 0–0–0 14.Qe2 Nf6 15.Qc4 Bd6 16.Ng6 fg6 17.Bd4+=; 13.Ng2=) 13...0–0–0 14.Qc4+=; 12...h5 A) 13.Be2 hg4 14.h4 (14.Rg1 Bf5=+) 14...Rh4 15.Rh4 Qh4 16.Ng6 fg6 17.Be5=+; B) 13.h4 Qg4 (13...Qh6) 14.Qg4 hg4 15.Ng6 fg6 16.Bd4 Nf6 17.Bc5 Bc5 18.Bg2 0–0–0 19.Ne4 Ne4 20.Be4 g3 21.Bg6 Rd6 22.Bd3+=; C) 13.Bg2 0–0–0 14.Qe2 f5 15.b6 (15.h4 Qh6 16.g5 Qh7+/–) 15...c6 16.h4 Qh6 17.g5 Qh7+/–) 13.h4 h6 14.Ng6 fg6 15.Bg2+/– (15.Qe2 Nf6 16.Bg2+/– 0–0–0 17.g5 hg5 18.hg5 Rh1 19.Bh1 Nfd7 20.Qg4 Kb8 21.Ne4 Ne5 22.Qg2 Ncd3 23.cd3 Nd3 24.Kf1 Nb2 25.Ng3+– c5 26.bc6 Nc4 27.Kg1 Ne3 28.c7 Qc7 29.fe3 Bc5 30.Nf1 Qe7 31.Qg3 Bd6 32.Qg4 Ba3 33.Be4) 15...Qe6 16.g5 (16.Qe2 Nf6 17.g5 hg5 18.hg5 Rh1 19.Bh1 Nh7+=; 16.Bd4 Nf6=) 16...hg5 17.Bh3 Qe7 (17...g4 18.Qg4 (18.Bg4+=) 18...Qg4 19.Bg4 Nf6 20.Bh3 Be7 21.Bg2 0–0–0 22.a4 Rh5 23.Bd4 Re8 24.Ke2 Bd6 25.Rag1 Kd8 26.f4 b6 27.Bc5 Bc5 28.c4+/–) 18.hg5 Rh5 19.f4 ef3 20.Qf3 Rg5 (20...Qg5 21.0–0–0 Nf6 22.Nc4 Rh4 23.Rdg1 Qh5 24.Qh5 Rh5 25.Rg6 Kf7 26.Rgg1+=) 21.0–0–0 Rd8 22.Nc4 Nf6 23.Rd8 Qd8 24.Na5 Qd5 25.Qd5 Nd5 26.Re1 Nb6 27.Bf1 Nba4 28.Be2 c6 29.bc6 Nb2 30.Kb2 Na4 31.Ka1 Ra5 32.cb7 Bd6 33.Rb1 Bb8 34.Rb5 Ra7 35.Bf3 ½–½. Pommerel,Wim – Krasny,Henryk Jan, TKM/SF/01, 2001.

7.Ne2 Nf6

8.Nd2 Nbd7 9.h3 Bf5 10.g4 Be6 11.Nf4 h5 12.Ne6 fe6 13.gh5 Rh5 14.de4 de4 15.Qe2 0–0–0 16.0–0–0 ½–½.

8.Nd2 Nbd7 9.h3 Bh5 10.g4 Bg6 11.Nf4 Qh4 12.Ng2 ½–½.

8.Nd2 Nbd7 9.h3 Bh5 10.g4 Bg6 11.Nf4 h5 12.Nf3 ef3 13.h4 Qf4 14.ef4 hg4 15.Qd2 Bd6 16.0–0–0 0–0 17.Re1 ½–½.

8.Nd2 Nbd7 9.h3 Bh5 10.g4 Bg6 11.Nf4 h5 12.Nf3 ef3 13.h4 Qg4 14.Bh3 ½–½.

8.Nd2 Nbd7 9.h3 Bh5 10.g4 Bg6 11.Nf4 h5 12.Nf3 ef3 13.h4 Qh6 ½–½.

4.a3 a6

5.c4 c6 6.Nc3 Nf6 7.cd5 cd5 8.Nge2 Ng4 (8...Bd6 9.Qb3 Be5 10.f4 ef3 11.gf3=) 9.h3 (9.Nf4 Nf6+=) 9...Ne5 (9...Nf6 10.Nf4+=) 10.Nd4 (10.Nf4 Nc4 11.Bc4 dc4 12.Ne4 Qe7+–) 10...Be7 11.d3 Nbd7? (11...ed3!? 12.Bd3 Nbc6+=) 12.de4 (12.Nd5 Nf6 13.de4 Ne4+–) 12...de4+/- 13.Ne4 0–0 14.Nf5 h6? (14...Bf6 15.Qc2+–) 15.Be5?? (better is 15.f4 Bh4 16.g3+–) 15...Ne5 16.Ne7 Kh7?? (better is 16...Qe7 17.Qd6 Qe8+/-) 17.Qd8+– Rd8 18.Nc8 Rdc8 19.f4 Ng6 20.Nd6 Rc7 21.Bd3 Rd8 22.Bg6 fg6 23.Ne4 Rc2 24.0–0 Rd3 25.Rfe1 Rb3 26.Rac1 Ra2 27.Rc7 b5 28.Nf6 1–0. Flewelling,Heather – Gosling,David C, GB/TT1/D3 (ENG), 2011.

5.c4 Nf6 6.cd5 Nd5 7.Bc4 (7.d3 Qh4=) 7...Nf6 (7...Qg5 8.Bd5 Qg2 9.Qh5 Qh1 10.Qf7 Kd8 11.Bf6 gf6 12.Qf6 Kd7 13.Be6 Kc6 14.Bc8 Bd6 15.Qh8 Qg1 16.Ke2+/–) 8.h3 (8.Qc2 Bf5=) 8...Be7 9.Ne2 b5 10.Bb3 c5 (10...0–0 11.Qc2+=) 11.Bf6 (11.bc5 Nbd7 (worse is 11...Bc5 12.Qc2+/–) 12.c6 Nc5=) 11...Bf6+= (worse is 11...gf6 12.bc5 f5 13.Qc2+=) 12.Nbc3 c4 (12...cb4 13.ab4 Bb7 14.Bc2=) 13.Bc2 Bb7 14.Ng3 Qe7 (14...0–0 15.Be4 Be4 16.Nge4=) 15.Nce4 (15.Nge4 Be4 16.Be4 Bc3 17.Ba8 Ba1 18.Qa1 0–0=) 15...Ba1= 16.Qa1 0–0?? (16...f6 17.Nf5 Qc7 18.Nf6 Kf8+–) 17.Nf5+– c3 (17...f6 18.Ne7 Kh8+–) 18.Qc3 Qf6 19.Nf6 gf6 20.Qf6 Nd7 (20...Bg2 21.Qg7) 21.Nh6 1–0. Janek – yxdjango, internet, 2017.

4.a3 c5

5.b5 d4 6.ed4 cd4 7.Bc4 Nf6 8.Ne2 Bc5 9.0–0 0–0 10.d3 Qd6 11.de4+= Ne4 12.Nd4 Qf6 13.Nf3?? Qb2–+ 14.Nbd2 Nd2 15.Qd2 Be6 16.Be6 fe6 17.Rfe1 Bb4?? 18.ab4+– Qf6 19.Qd6 Rd8 20.Qe6 Qe6 21.Re6 a6 22.h4 h6 23.h5 Kf7 24.Rb6 Ra7 25.ba6 Ra6 26.Rb7 Kf6 27.Ra6 Na6 28.b5 Nb4 29.c4 Rd1 30.Kh2 Nd3 31.Kg3 Rf1 32.Rd7 Nf2 33.Nh2 Ne4 34.Kh3 Rc1 35.Ng4 Ke6 36.Rg7 Rc4? 37.Nh6 Rb4 38.Rg6 Kd5 39.Rb6 Ng5 40.Kg3 Kc5 41.Rb8 Ne4 42.Kh3 Nd6 43.g4 Rb1 44.b6 Kc6 45.Kh4 Ne4 46.Kh3 Nd6 47.Nf5 Nb7 48.h6 Kb6 49.g5 Kc7 50.Rb7! Kb7 51.g6 Rb3 52.Kg4 Rb4 53.Kg5 Rb1 54.g7 Kc7 1–0. boa – Mengs, ChessWorld.net, 2004.

5.Nc3 cb4 6.Bb5 Nc6=+ 7.Nce2 a6 8.Bc6 bc6–/+ 9.ab4 Bb4?? 10.Bg7+– f6 11.Bh8 h6 12.c3 Bd6 13.f3 Qc7 14.f4 Qh7 15.Bf6! Nf6 16.Ng3 Bg4 17.Qa4 Kd7 18.N1e2 h5 19.Nd4 Rc8 20.Qa6 h4 21.Nge2 Be2 22.Ne2 Rc7 23.h3 Qg8 (23...Qg8 24.0–0 Qg6+–). Dave55 – themuttsknutts, ChessWorld.net, 2010.

5.bc5 Bc5?? 6.Be2 Nf6=+ 7.d4 Bd6 8.Nd2 a6 9.c4 dc4 10.Nc4 Bc7 11.Nh3 b5 12.Nd2 Nbd7 13.Ng5 Bb7 14.Qc2 Ba5 15.0–0 Rc8 16.Qd1 h6 17.Nge4? Be4 18.Ne4 Ne4 19.Bd3 Ndf6 20.f3 Nc3 21.Qb3 0–0 22.Rac1 Nfd5 23.Kf2 Kh8 24.Bc3 Rc3 25.Qb1?? Re8 26.Be4 Ne3 27.Rc3 Nf1 28.Kf1 Bc3 29.Qb3 Qd4 (29...Qd4 30.g3 Qf6–+) 0–1. mic (2145) – pops (2190), net–chess.com, 2007.

5.bc5 Nc6 6.Bb5 Bd7 7.Ne2 Be7?? 8.Bg7+– Bf6 9.Bh8 Bh8 10.Nbc3 Nge7 11.Rb1 Rb8 12.0–0 Ne5 13.Bd7 Nd7 14.d4 Nf6 15.Rb3 Nc8 16.Qb1 Qc7 17.Nf4 b6 18.Nfd5 Qb7 19.Nf6 Bf6 20.cb6 Ra8 21.ba7 Qa7 22.Ne4 Be7 23.Qa2 Nb6 24.Ra1 Na4 25.c4 Rc8 26.c5 Kf8 27.Qc2 f6 28.Rb4 Ra8 29.Rc4 Kf7 30.Rb1 Qa5 31.Rbb4 Nc5 32.Nc5 Bd6 33.Qh7 Ke8 34.Qg8 Ke7 35.Rb7 Bc7 36.Qe6 Kf8+– 37.Nd7 Kg7 38.Qf6 Kh7 39.Qf7 Kh6 40.Rc6 Kg5 41.Rg6 Kh4 42.g3 Kh5 43.Qh7 1–0. thedesertfox (1970) – theeagle, net–chess.com, 2004.

4.a3 Be7

5.c4?? Bf6= 6.Bf6 (6.Nc3 dc4 7.Qc2 Bf5=) 6...Nf6 (worse is 6...gf6 7.cd5 Qd5 8.Nc3+/-) 7.cd5 Qd5 8.Nc3 Qd8 9.Bc4 Bg4 (9...Bf5 10.Nge2=) 10.Nge2 (10.Qc2 Bf5+=) 10...0–0= 11.Qc2 Re8 12.Ng3 The pressure on e4 grows 12...a6 (12...Qe7 13.0–0=) 13.h3 Bh5 (13...Bd7!?+/-) 14.Nh5 Nh5 15.Ne4 b5 (15...Nc6 16.0–0+–) 16.Be2+– Nf6 17.Nf6 Qf6 18.0–0 Nd7 19.Qc7 Ne5 20.d4 Rac8 (20...Ng6+–) 21.de5 Qf5 (21...Qf2 22.Rf2 Rc7 23.a4+–) 22.Qd6 Re6 (22...Qc2 23.Bg4 Rc6+–) 23.Bg4 Qe5 (23...Qg4 24.hg4 Rd6 25.ed6 Kf8+–) 24.Qe5 Re5 25.Bc8 1–0. Fournier,Frederic – altay2, Live Chess Chess.com, 2012.

5.Bg7 Bf6 6.Bh8 Bh8 7.c3 Qh4 8.g3 Qg5 9.h4 Qg6 10.Nh3 Bg4 11.Qa4 c6 12.Nf4 Qf5 13.b5 Nf6 14.bc6 bc6 15.d4 Nh5 (15...ed3 16.Bd3 (16.Nd3?! Qe4 17.Qe4 Ne4+/–) 16...Qe5 17.Qd4+–) 16.c4 Nf4 17.gf4 (17.ef4? Bd4 18.Bg2 Ba1 19.cd5 Qd5 20.Be4 Qc5–+) 17...Bd4 18.Ra2?? (better is 18.ed4 Qf4 19.Nc3+–) 18...Bb6 (18...Bg7 19.Nd2 d4 20.Qb3+–) 19.cd5 (19.Rb2 Bd8+–) 19...Qd5+/– 20.Bc4 Qd6 (20...Qa5 21.Qb4+/–) 21.Rd2+– Qf6 (better is 21...Qc7 22.Rg1 h5+–) 22.Nc3?? (better is 22.Bd5+–) 22...Qc3–+ 23.Bf7 Kf7 24.0–0 Bf3 25.Rc2 Qg7 0–1. maxii – darling, Live Game Caissa's Web, 2004.

4.a3 f5

5.Bb5 Bd7 6.Qh5 g6=.

5.c4 b6 6.Qh5+= g6 7.Qd1 Nf6 8.cd5 Rg8 (8...Bg7 9.Bc4+=) 9.Bc4 (9.Bf6 Qf6 10.d4+/–) 9...Rg7 (better is 9...Nd5!? 10.d3 c6 11.de4 fe4+/–) 10.d3+– Rd7 (10...c5 11.de4 fe4+–) 11.Nd2 (11.Bb5 c6 12.dc6 Rc7+/–) 11...Nd5 (11...ed3!? 12.Bb5 Nd5 13.Bd7 Nd7+/–) 12.de4+– fe4 13.Ne4 Ne3? (better is 13...Be7+–) 14.Qf3 Nc2 (14...Nc4 15.Nf6 Qf6 16.Bf6+– (16.Qf6?! Bb7 17.f3 Re7 18.Kf2 Nd7+=)) 15.Kf1 Na1 (15...Ba6 16.Ba6 Na6 17.Nf6 Ke7 18.Qe2 Kf7 19.Qc2+–) 16.Nf6 Ke7 (16...Qf6 17.Bf6 c6 18.Ba1 Bd6+–) 17.Qe2 (17.Qa8? Rd1 18.Ke2 Qd2 19.Kf3 Qb2 20.Nd5 Rd5 21.Qd5 Qa3 22.Ke2 Qb4–+) 17...Kd6 18.Qe6 1–0. pierre – First Knight, ChessHere.com, 2005.

5.c4 dc4 6.Bc4 Qg5 7.g3 =.

5.c4 c6 6.cd5 cd5 7.Bb5 Nc6 8.Ne2 a6 9.Bc6 bc6 10.0–0 (10.Nf4 Qg5=) 10...Nf6 11.Qc2 Bb7 (11...Bd7 12.Nd4=) 12.Nbc3 (12.Nd4 Qd7+=) 12...Rc8 (12...a5 13.Na2=) 13.Nd4 (13.Na4 Nd7+=) 13...Qd6 (13...c5 14.bc5 Bc5 15.Nf5=) 14.Nf5 (14.f3 Qd7+=) 14...Qe5 (14...Qd7!? 15.Ng3 c5+=) 15.Ng3+/– Bd6?? (better is 15...Qc7+/–) 16.Nce4!+– (16…de4 17.Be5 Be5 18.Ne4 Ba1 19.Nd6 Kd7 20.Nc8+– (20.Ra1?! Kd6 21.Qc5 Kd7+–)) 1–0. Wall,Bill – Guest8414, internet, 2003.

5.c4 c6 6.cd5 cd5 7.Nc3 Nf6 8.d3 Nc6 9.de4 fe4 10.Bb5 Be7 11.Nge2 0–0 12.Nf4 The pressure on the backward pawn d5 grows 12...a6 13.Be2 Bg4?? (better is 13...d4 14.ed4 Nd4 15.Bc4 Kh8+=) 14.Bg4+– Ng4 15.Qg4 Bh4 (15...Rf4 16.ef4 Bf6 17.Qe6 Kf8 18.Rd1+–) 16.g3 (better is 16.Ne4 Rf7 17.Rd1 Qf8+–) 16...Bf6 17.Ne6 (better is 17.Nfd5 Ne5 18.Qe4 Nf3 19.Ke2+–) 17...Qd7 (better is 17...Qc8!? 18.Nd5 Bb2+–) 18.h3+– Rfe8 19.Nf4 Qe7 (19...Qf7 20.Qh5 Rad8 21.Qf7 Kf7 22.0–0–0+– (22.Nfd5?! Rd5 23.Nd5 Bb2+–)) 20.0–0 (better is 20.Ncd5 Bb2 21.Ne7 Re7+–) 20...Rac8 (20...Ne5 21.Nfd5 Ng4 22.Ne7 Re7 23.hg4+–) 21.Nfd5 (better is 21.Ncd5 Bb2 22.Ne7 Ne7 23.Rab1+–) 21...Qf7 22.Nf6 Qf6 23.Rab1 (better is 23.Na4 Qf7+–) 23...Ne5 24.Qf4 Nf3 25.Kg2 Qg6 (25...Qf4 26.gf4 Nd2+–) 26.Ne4 Qe4 (26...Ne1 27.Rfe1 Re4 28.Qf3+–) 27.Qf3 Qd3 (27...Qe7 28.Rbc1+–) 28.Rfd1 Qc2 (28...Qb5 29.Rd5 Rf8 30.Rb5 Rf3 31.Rb7+–) 29.Bd4 (better is 29.Rd7 Qg6 30.Rg7 Qg7 31.Bg7 Kg7 32.Qb7 Kh8 33.Qa6 Ra8 34.Qf6 Kg8+–) 29...Qa2 (29...Rf8 30.Qd5 Rf7 31.e4+–) 30.Qb7 Rc2 (30...Qf7 31.Qf7 Kf7 32.b5 ab5 33.Rb5+–) 31.Rf1 (31.Qg7) 31...Qf7+– 32.Qf7 Kf7 33.Kg1 Kg6 34.Rfc1 Re2 (34...Rec8 35.Rc2 Rc2 36.b5 ab5 37.Rb5+–) 35.Re1 (better is 35.Rc6 Kf5+–) 35...Ra2 36.Ra1 Rc2 37.Rec1 Re2 (37...Rec8 38.Rc2 Rc2 39.a4+–) 38.Rc6 Kf5 39.Rc5 (39.Bg7 Re7 40.g4 Ke4+–) 39...Ke4 (39...Ke6 40.Kf1 Rd2 41.Ke1+–) 40.Rac1 (better is 40.Rd1 Rf8 41.f3 Kf3 42.Rf1 Kg3 43.Rf8 Re1 44.Rf1 Rf1 45.Kf1 Kh3 46.Rh5 Kg3 47.Rh7 g5+–) 40...Kf3 (40...g6 41.Kg2 Rf8 42.Bf6+–) 41.R1c2 1–0. Fournier,Frederic (1890) – ricks25, Active, 2008.

5.c4 Nf6 6.cd5 Nd5 7.Nc3 Be6 8.Nd5 Bd5 (8...Qd5 9.Nh3=) 9.d3 Nc6 (9...Qh4 10.de4 Be4 11.Nf3+=) 10.de4 Be4 (10...fe4 11.Ne2 Qd6 12.Nc3+=) 11.f3 (better is 11.Qh5 g6 12.Qh3 Nb4 13.Rd1+/- (13.Bh8?? Nc2 14.Ke2 Qd3#; 13.ab4?? Bb4 14.Bc3 Bc3 15.Ke2 Qd3#)) 11...Bd5= 12.Bb5 a6 13.Ba4 b5 14.Bb3 Bb3 15.Qb3 Qe7 (15...Qh4 16.g3 Qh6 17.Ne2+=) 16.Rd1 (16.Rc1 Qd7+/-) 16...Rd8 17.Rd8 Qd8 (17...Nd8 18.Ne2+=) 18.Ne2 Qe7 19.Kf2 (19.Ng3 f4 20.Nf5 Qf7+/-) 19...h5 (19...Ne5 20.Qd5 Nc4 21.Bd4+/-) 20.Nd4 (20.Qc2 Qd7 21.Rd1 Bd6+–) 20...Nd4 21.Bd4 Qf7 22.Qf7 Kf7 23.Rc1 Bd6 24.Rc6 Ra8 25.h3 a5 26.Bc3 (26.Bc5 ab4 27.Bb4 Ke6=) 26...ab4 27.Bb4 Ke6 28.f4 (better is 28.Bd6 cd6 29.Rc3=) 28...Kd5–+ 29.Rc3 (better is 29.Rc1 c5 30.Rd1 Ke6 31.Bc3–+) 29...c6?? (better is 29...c5 30.Rd3 Ke6–+) 30.Bd6 (better is 30.Rd3 Kc4 31.Rd4 Kb3 32.Rd6+–) 30...Kd6+= 31.Kf3 Kd5 32.g4 hg4 33.hg4 g6 34.g5 Rh8 35.Kg3 Re8 36.Kf3 Re4 37.Rd3= Kc5 38.Ke2 b4 39.ab4= Rb4 40.Rd7 Kc4?? 41.Rd6 c5 42.Rg6 Rb2 43.Kf3 Kd3 44.Rf6 c4 45.Rf5 c3 46.Rc5?? c2+/- 47.g6 Kd2?? 48.g7+– Rb8 49.Rd5 Kc3 50.Rc5 Kd2 51.f5 c1Q 52.Rc1 Kc1 53.e4 Kc2 54.Kf4 Kd3 55.e5 Kd4 56.f6 Kd5 57.Kf5 Re8 58.f7 Re5 59.Kg6 Re6 60.Kh7 1–0. Fournier,Frederic – 11_17liski (1610), ChessOK.com, 2012.

5.Bd4 Nf6 6.Nh3 Nc6 7.d3 (better is 7.Bb5!?=) 7...Nd4–/+ 8.ed4 Bd6 9.Nc3 Ng4 (better is 9...0–0!?–/+) 10.Nd5= c6 11.de4? (11.Ne3 Nh2 12.Be2 f4 13.Bh5 g6+=) 11...fe4 (better is 11...cd5 12.e5 Be7–/+) 12.Be2?? (12.Nc3 Qe7=) 12...Nf6?? (better is 12...Qh4 13.Bb5 cb5–+) 13.Nf6= Qf6 14.Bc4 Bh3 15.Qh5 g6 16.Qh3 b5 17.Qg4?? bc4–/+ 18.Qe4 Kd7 19.Qg4 Kc7 20.0–0 h5 21.Qd1 Qf4 22.g3 Qf5 23.Rc1 h4 24.Qe2 hg3 25.fg3 Qh3 26.Rf3 Rae8 27.Qf2 Ref8 28.Rf8 Rf8 29.Qe3 Rh8 30.Qf2 Rf8 31.Qe3 Rh8 32.Qf2 Rf8 33.Qe3 Rh8 34.Qf2 Rf8 35.Qe3= ½–½. willi_weizenkeim – daveboy6968, playchess.de, 2003.

5.Ne2 Nf6 6.Nf4 Nc6 (6...Bd6 7.Nh5 (7.Be2 0–0 8.0–0 c6 9.d3 Qc7 10.g3) 7...Nh5 8.Qh5 g6 9.Qh6= Bf8 10.Qf4; 6...Be7 7.Be2 (7.c4 c6 8.cd5 cd5 9.Nc3 Nc6 10.d3) 7...a5 8.b5 0–0 9.0–0 g5 10.Nh5; 6...c6 7.Be2 Bd6 8.Nh5 Nh5 9.Bh5 Kf8 10.Nc3) 7.c4 (7.Bf6 Qf6 8.Nd5 Qf7+= 9.c4 Be6 10.Nbc3; 7.b5 Na5 8.Bf6 Qf6 9.Nd5 Qe5 10.c4) 7...d4 (7...dc4 8.Bc4 Bd6 9.Nh5+= Qe7 10.Bf6) 8.ed4 (8.b5!? Ne5 9.Bd4+/– Neg4 10.Nc3) 8...Nd4= 9.c5 (9.d3 c5 10.Nc3) 9...Ne6 (9...b6 10.cb6+= (10.d3 bc5 11.de4 fe4 12.Bc4+=)) 10.Ne6 (10.Nh5=) 10...Be6 11.Be2 (11.d3 b6=) 11...Be7 12.0–0 0–0 13.Nc3 (13.d3 b6=) 13...Nd5 (13...b6 14.d4+=) 14.Nd5 Bd5 15.d4 (15.d3 b6=) 15...c6 16.b5 (16.Qc2 f4+=) 16...f4 17.bc6 (17.f3 e3+=) 17...bc6 (17...f3 18.gf3 ef3 19.Bd3 Bc5 20.Qd2–+) 18.f3 e3 19.Bd3 Rb8 20.Rb1 (20.Qc2 h6+=) 20...Bh4 (20...Ba2 21.Ra1 Rb2 22.Ra2 Ra2 23.Bc4 Kh8 24.Ba2–+) 21.Be4 (21.Qc2 Bf2 22.Rf2 ef2 23.Qf2 Re8–/+) 21...Bf2 22.Kh1 Re8 23.Qc2 g6 (23...Kh8 24.Bc3+=) 24.Bd5 (24.Bc3!?+=) 24...Qd5–/+ 25.Rbd1?? (better is 25.Qe2–/+) 25...e2–+ 26.Rde1 (26.Bc3 Bd4 27.Bd4 ef1R 28.Rf1 Qd4–+) 26...ef1Q (26...ef1R 27.Rf1 Bd4 28.Bd4 Qd4 29.Rd1–+) 27.Rf1 Bd4 28.Rd1 (28.Bd4 Qd4 29.Qa2 Kg7 30.Qc2–+) 28...Rb2 29.Qb2 Bb2 30.Rd5 Re1 0–1. Nautiluschess – geomck, ICS blitz, 2001.

5.Qh5 g6 6.Qd1 Nf6 7.c4 c6 8.cd5 cd5 9.Bb5 Nc6 10.Qa4 (10.Ne2 Bg7=) 10...Bd7+= 11.Ne2 a6 12.Bc6 bc6 13.Nf4 Bg7 14.Nc3 0–0 15.Qb3 Kh8 16.Na4 Rb8 (16...g5!? 17.Nh3 a5=) 17.Nc5+= Qe7 18.Na6 (better is 18.Qa4+=) 18...Rb6–/+ 19.Nc5 Qc5! 20.Bd4 (20.bc5 Rb5 Double attack (20...Rb3 Pinning; 20...Rb3 Deflection; 20...Rb5 Decoy; 20...Rb3 Remove defender)) 20...Qb5 21.Bb6 Qb6 22.0–0 Rb8 (22...g5!? 23.Nh3 h6–/+) 23.d4 ed3 24.Qd3 (24.Qd3 Ng4 Combination; 24.Nd3 c5 Combination) 24...Ne4 25.Ra2 (25.Rab1 Ra8 26.Rfc1 Qa6 27.Qa6 Ra6–/+) 25...Bc8 26.Rc1 Ba6 27.Qb3 Bc4 28.Rc4 dc4 29.Qc4 Qd8 30.h3 Qd1 31.Kh2 Nc3 32.Qf7?? (better is 32.Rb2–/+) 32...Na2–+ 33.Ne6 (33.Qa2 Qa1 34.Qa1 Ba1 35.Kg3–+) 33...Qd6 34.g3 Bb2 (better is 34...Bh6 35.Nd4 Nc3–+) 35.Ng5= Bg7 36.Ne6 Qe5 (36...Bh6 37.Nd4 Nc3 38.Qc4–+) 37.Nd4 (37.Ng7 Nb4 38.ab4 Qg7 39.Qe6–+) 37...Qd5 38.Ne6 Rg8 39.Ng5 Rf8 40.Qb7 (40.Qe7 Rf6 41.Qe8 Qg8 42.Qe5–+) 40...h6 41.e4 (41.b5 hg5 42.Qc6 Qc6 43.bc6 Rc8–+) 41...Qc4 42.Ne6 Qe6 43.ef5 0–1. Vila Vila,Ricard – Vilarrasa Pujol,Joaquim (1850), Moia ESP, 2nd Open, 2013.

5.Qh5 g6 6.Qd1 Nf6 7.Ne2 Bd7 8.g3 Bg7 9.Bg2 0–0 10.0–0 a5 11.c3 ab4 12.cb4 b6 13.Nbc3 c5 14.bc5 bc5 15.Qc2 Bc6 16.d3 Ng4 17.h3 ed3 18.Qd3 Ne5 19.Qc2 c4?? 20.Rfd1 Nd3= 21.Nd4 Nb2 22.Qb2 Ba4?? 23.Na4 Ra4 24.Qb5 Ra6?? 25.Bd5+– Kh8 26.Bc4 Rb6 27.Qa4 Qf6 28.Rac1 Rb7? 29.Ne6 Re8 30.Qe8 Bf8 31.Qf8 Qf8 32.Nf8 Kg7 33.Ne6 Kh6 34.a4 Ra7 35.Bb5 Na6 36.Ba6 Ra6 37.Nc5 Rb6 38.Ra1 Rc6 39.Nd7 Kh5 40.a5 g5 41.a6 h6 42.a7 f4 43.ef4 g4 44.Rd5 Kg6 45.Ne5 Kf6 46.Nc6 gh3 47.a8Q h2 48.Kh2 Kg6 49.Qg8 Kf6 50.Ra6 h5 51.Nd8 Ke7 52.Qf7# 1–0. mic (2225) – cruciverbalist (2055), net–chess.com, 2007.

5.d3 Nf6

6.de4 fe4 7.c4 a5 8.b5=.

6.de4 fe4 7.c4 c6 8.cd5 cd5 9.Bb5 Nc6 10.Be2 (10.Bd4 a5=) 10...Bd6 11.Bh5 g6 12.Be2 Be6 13.b5 Ne5 14.Qd4 0–0 15.Nd2 Qe7 16.f3 Ned7 17.fe4 Be5 18.Qa4 (18.Qe5 Ne5 19.Be5 Ne4 20.Ngf3–+) 18...Bb2 19.Rd1 Qa3 (19...Nb6!? 20.Qc2 Ba3 21.e5–+) 20.Qa3 Ba3 21.ed5 Nd5 22.Bc4 N7b6 23.Bb3 Rae8 (better is 23...Bb4–+) 24.Ne2 (24.Ra1 Bd6 25.e4–+) 24...Ne3 25.Be6 Re6 26.Rb1 Ng2 (26...Ng2 27.Kd1 Rf2–+) 0–1. Rosner,Dirk – Leisebein,Peter, corr SOK–89–35, 1989.

6.de4 fe4 7.c4 c6 8.cd5 cd5 9.Ne2 Bd6 10.Nd4 0–0 11.Nc3 (11.Be2 Nc6=) 11...Nc6 12.Nc6 bc6 13.Be2 a5 14.b5 cb5 (14...Rb8 15.Rb1 Bd7 16.Qd2+=) 15.Nb5 (15.Nd5 Ne8+=) 15...Ba6 (15...Rb8 16.Qd2=) 16.Nd6 (16.Bf6!? Qf6 17.Qd5 Kh8 18.0–0+=) 16...Be2= 17.Qe2 Qd6 18.0–0 Ra7 19.Rfd1 Raf7 20.Rf1 Qe6 21.Bd4 (21.Bf6!? Rf6 22.Qd2=) 21...Ng4+= 22.Ra2? (better is 22.f4 ef3 23.Rf3 Rf3 24.gf3+=) 22...Rf2–+ 23.Rf2 Rf2 (23...Nf2?! 24.Qb5 Nd3 25.Qa5+=) 24.Qf2 Nf2 25.Rf2 Qd6 26.Rf5 Qa3 (26...a4!? 27.Rg5 g6 28.Re5–+) 27.Rd5 Qc1 28.Kf2 a4 29.Rd8 Kf7 30.Rd7 Ke6 31.Rg7 a3 32.Rh7 a2 33.Rh6 Kd5 34.Rh5 Kd6 35.Rh6 Kc7 36.Rh7 Kd6 37.Rh6 Ke7 38.Ra6 (38.Rh7 Kf8 39.Ra7 Qd2 40.Kg3 Qe1 41.Kf4 Qf2 42.Ke4 Qg2 43.Kd3 Qf1 44.Kd2 Qb1+=) 38...Qc2 39.Kg3 Qc7 40.Kf2 Qc2 41.Kg3 Qc8 42.Kf2?? (better is 42.Ra7 Kd6 43.Kf4–/+) 42...Qa6–+ 43.Kg3 a1Q 44.Ba1 Qa1 45.Kf4 Qa4 46.g4 Kf6 47.h4 (47.g5 Kg6–+) 47...Kg6 (47...Qc2!? 48.g5 Ke6 49.Kg3–+) 48.h5 Kh6 49.Kg3 (49.Kf5 Qc2–+) 49...Kg5 0–1. Fournier,Frederic (1920) – irisrojo (1800), Active, 2005.

6.de4 fe4 7.c4 Be7 8.Nc3 (8.cd5 c6+= 9.dc6 Qd1 10.Kd1 Nc6 11.Nd2 Rf8 12.Ke1 Be6) 8...0–0 (8...c6!?= 9.cd5 cd5 10.Rc1 Nc6 11.Nge2 Bg4 12.h3 Bh5) 9.cd5 (better is 9.Nd5 a5 (9...Be6 10.Nf6 Bf6 11.Qd8 Rd8 12.Bf6 gf6) 10.Nf6 Bf6 11.Qd8 Rd8 12.Bf6 gf6 13.b5+/–) 9...Ng4? (better is 9...a5!? 10.Bc4 (10.ba5 Nbd7 11.a6 ba6 12.Bc4 Ne5) 10...Bd6 11.ba5 Ra5+/– 12.Nb5 Nbd7; 9...Nbd7 10.Qb3 Bd6 11.Nb5 a6 12.Nd6 cd6; 9...Bd6 10.Qc2 Qe7 11.Nb5 a5 12.ba5 Ng4) 10.Ne4+– Bf5 (10...Nf6 11.Qd4+–) 11.Bc4 (better is 11.d6 cd6 12.Qd5 Kh8 13.Qb7+/–) 11...Be4?? (better is 11...Kh8 12.Qd4 Nf6+–) 12.d6 Kh8 13.de7 Qe7 (13...Qd1 14.Rd1 Re8 15.Bf7+–) 14.Qg4 Nc6 (14...Nd7 15.Rd1 Bf5 16.Qg3+–) 15.Ne2 Rae8 (15...Rad8 16.Nf4 Bf5 17.Qg3 Nb4 18.0–0+– (18.ab4?! Qb4 19.Kf1 Qb2+/–)) 16.0–0 Bf5 17.Qg3 a5 18.Nf4 Ne5 19.Nd5 Qd6 20.f4 (20.Rfd1 Bc2 21.Rd2 Bg6 22.Be5 Re5+–) 20...Nc4 (20...Ng6 21.Rfd1 Rd8+–) 21.Qg7 1–0. pereira – tjiqos, internet, 2009.

6.de4 fe4 7.c4 Bg4 8.Qc2=.

4.a3 Nf6

5.Bb5 c6 6.Ba4 Bg4?? 7.Ne2?? a5 8.Bb3 ab4–/+ 9.ab4 Ra1 10.Ba1 Bb4 11.c3 Bd6 12.c4 Nbd7 13.h3 Be2 14.Qe2 0–0 15.cd5 cd5 16.Nc3 Qa5 17.Qd1 b5 18.0–0? b4–+ 19.Na4 Rc8 20.Bd4 Be5 21.Be5 Ne5–+ 22.f4 Nd3 23.Qb1 h6 24.Nb2 Nb2 25.Qb2 Qa3 26.Qb1 Rc5 27.d4? Rc3 28.Ba2 b3 29.Bb3 Rb3 30.Qa1 Re3 31.Qa3 Ra3 32.Rc1 Rd3 33.Kf2 Rd4 34.Ke2 Rd3 35.Rc2 d4 36.Rc8 Kh7 37.Rf8 Kg6 38.Rd8 Nh5 39.g3 Ng3 40.Kf2 Rf3 41.Kg2 d3 42.Rd6 f6 43.h4 Nf5 44.Rd5 Nh4 45.Kh2–+ Rf4 46.Rd4 f5 47.Rd6 Kg5 48.Rd7 g6 49.Rd4 Kg4 50.Ra4 Rf2 51.Kg1 Kg3 52.Ra3 Nf3 53.Kh1 Rf1# (53...Rh2#) 0–1. aji – Wizard, VOGChess (year?).

5.Bb5 c6 6.Be2 Bd6 =+.

5.Bb5 Bd7 6.Nc3 Bd6 =+.

5.Nc3 a5 6.ba5 Ra5 7.Nb5 c6–/+.

5.Nc3 a5 6.b5+=.

5.Nc3 a6 6.Be2 Nc6 7.Kf1 (7.d3 Be6+=) 7...Be7 8.Na4 0–0 9.Rb1 d4 10.ed4 Nd4 11.Nc5 (11.d3 b5 12.Nc3 ed3 13.Bd3 Bb7–/+) 11...b6 12.Bd4 Qd4 13.Nb3 Qe5 14.h4 (14.d4 Qf5 15.c4 a5–/+) 14...Bb7 (14...a5 15.ba5 ba5 16.a4–+) 15.h5–/+ Rfd8 16.h6 g6 17.Bc4 (17.d4 ed3 18.cd3 Qf5–/+) 17...e3 (17...Qg5–/+) 18.fe3? (18.Qe2 Qg5 19.fe3 Ne4–/+) 18...Qf5?? (better is 18...Qe4 19.Qe2 Qc2–+) 19.Nf3+= Ne4 20.Nbd4 Rd4+= 21.ed4 Ng3 22.Kg1 Nh1 23.Kh1 Qh5 24.Kg1= Bd6 25.Ne5 Qh6 26.Bf7 Kh8 27.Qf1 Be5?? 28.de5+– g5 29.Qc4 b5? 30.Qc7 Qc6 31.Qc6 Bc6 32.d4 Rf8 33.Rf1 Kg7 34.d5 Be8 35.Be8 Re8 36.Re1 Kf7 37.Re2 h6 38.g3 Kg6 39.e6 Kf6 40.Re4 Kf5? 41.Re3 Kf6 42.g4 Ke7 43.Rd3 Kd6 44.Kg2 Rf8 45.Kg3 Rc8 46.c3 Re8 47.Kh3 Rc8 48.Kg2 Rf8 49.Kh2 Rf4? 50.Rd4 Rf2 51.Kh1 (51.Kh1 Rf8 52.Kg2+–; 51.Kg3 Rf8+–) 1–0. mrkt – okulista, kurnik, 2007.

5.Nc3 a6 6.f3 Bf5 7.f4 c5 8.b5 b6 9.ba6 Na6 10.Bb5 Bd7 11.Nge2 c4 12.Nd4 Bb5 13.Ncb5= Be7 14.0–0 0–0= 15.d3 Nc5 16.dc4= dc4 17.Nc6 Qe8= 18.Ne7 Qe7 19.Qe2 Ra4 20.Rad1= Nb7 21.Rd4 Rc8 22.Rfd1 h6 23.Nd6 Nd6= 24.Rd6 c3 25.Bc1 Raa8 26.Rb6 Nd7? 27.Rb7+/– Qf6?? 28.Rdd7+– Rf8 29.Qc4 Rae8 30.a4 Re6 31.Ba3 Rfe8 32.a5 g6 33.a6! Rd8 34.a7 (34.a7 Ra8 35.Be7 Re7 36.Re7+–) 1–0. Pepito Centeno – Ginger Prince, ChessWorld.net, 2004.

5.Nc3 c6 6.d3= a5 7.b5 Bd6 8.de4 de4 9.Qd2 Qe7 10.Na4 (10.Rd1 Be5= (10...Ba3?? 11.Ba3 Qd7 12.Bd6+–)) 10...Nbd7 (10...0–0 11.Nb6 Ra7 12.Bd4+=) 11.Ne2 Bc7 (11...cb5 12.Nd4 0–0 13.Nf5=) 12.Nd4 Ne5 13.Rd1 0–0 14.b6 Bd8 15.Nb3 Bg4 16.Be2 (16.Rb1 Ned7 17.Na5 Nb6 18.Nb6 Bb6–/+) 16...Be2 17.Qe2 Ned7 18.Bf6 Nf6 19.Nbc5 Nd5 20.c4 Bb6 (20...Nb6 21.Nb6 Bb6 22.Nd7=) 21.Nd7+= (worse is 21.cd5 Bc5 22.Nc5 Qc5 23.dc6 bc6–/+) 21...Qd7 22.Nb6 Nb6 23.Rd7 Nd7 24.Qb2 Rab8 25.Qd4 Nf6 26.Qb6 Rfd8 (26...a4 27.Ke2+/–) 27.Ke2 a4 28.Rd1 Rf8 (28...Re8 29.h3+/–) 29.Rd4 h5 30.Ke1 Rfe8 (30...h4 31.c5+/–) 31.Rd6 (31.c5 Nd5 32.Qa7 Nc3+/–) 31...Rec8 (31...h4 32.h3+/–) 32.h3 (32.c5 Kf8+/–) 32...Re8 (32...h4 33.c5+/–) 33.Ke2 (33.c5 Nd5 34.Qa7 Nc3+/–) 33...Kh8 (33...Rec8 34.Qa7+/–) 34.Qa7 Kg8 35.c5 (35.Qa4 Ra8 36.Qb4 Ra7+/–) 35...Nd5 36.Kd2 Rf8 (36...Nc7 37.Qa4 Nb5 38.Rd7+–) 37.Qa4+– Rbe8 38.h4 (38.Qd4 Re7+–) 38...Re7 39.Ke1 Kh7 40.Kf1 f6 41.Ke1 ½–½. pierre (1950) – NebAnphu (1825), chesshere.com, 2006.

5.c4 c5 6.bc5 dc4 7.Bc4 Bc5 8.Qc2=.

5.c4 c5 6.bc5 Bc5 7.cd5 Qd5 8.Nc3 Qe6= 9.Nb5 Na6 10.Rc1 (10.Bf6 Qf6 11.Nc3 Bf5 12.Qa4 Kf8+=) 10...Qe7 (10...0–0 11.Bc4 Qb6 12.d4=) 11.Ne2 (11.Bf6 gf6 (11...Qf6 12.Rc5 Nc5 13.Nc7 Kf8 14.Na8+/–) 12.Nc3 Ba3 13.Ba6 Bc1 14.Bb5 Bd7 15.Qc1 Bb5 16.Nb5 0–0+=) 11...Bd7 12.Nf4 (12.Ng3 0–0+=) 12...Rc8 (12...0–0 13.Qb3=) 13.Qb3 0–0 14.Be2 Bb5 15.Bb5 Bd6 16.Rc8 Rc8 17.Ba6 ba6 18.0–0 h6 ½–½. Egerland,Edit (2230) – Hanes,Mojmir, Bratislava Slovan op, 1990.

5.c4 c5 6.bc5 Bc5 7.cd5+= Qd5 (7...0–0 8.d3+=) 8.Bf6+/– gf6 9.Nc3 Qe5 (9...Qe6 10.Qa4 Bd7 11.Qe4+/–) 10.Qa4 Bd7 (10...Nc6 11.Bb5 0–0 12.Bc6 bc6 13.Qe4+–) 11.Qe4+– Nc6 (11...Bc6 12.Bb5+–) 12.d4 (12.Nf3 Qe4 13.Ne4 Be7+–) 12...Nd4 (12...Qe4 13.Ne4 Be7 14.Nf3+–) 13.ed4 Bd4 The mate threat is Bxc3. . 14.Qe5 fe5 15.Nge2 Bb6 16.f4 ef4 (16...0–0–0 17.Nd5 Ba5 18.Kf2+–) 17.Nd5 Ba5 (17...f3 18.gf3 Ba5 19.Kf2+–) 18.Kf2 0–0–0 (18...f3 19.Kf3 Bc6 20.Nef4+–) 19.Nef4 Bc6 (19...Be6 20.Rc1 Kb8 21.Bc4+–) 20.Bc4 (20.Rc1 Bd2 21.Rc2 Bf4 22.Nf4 Rd4+–) 20...Rhe8 (20...b5 21.Bb3+–) 21.Rhd1 (21.Rhc1 Kb8 22.g3 b5 23.Bb5 Bb5+–) 21...Re4 22.Be2 (22.Be2 Bc7 23.g3+– (23.Nc7?! Rf4 24.Kg3 Rf6 25.Rd8 Kd8+/–); 22.Bb3 Bc7 23.g3 Bd6+–) 1–0. Trkn – guest3555, ICC, 2004.

5.c4 c5 6.bc5 Nbd7 7.Qa4 (7.cd5 Bc5 8.d3 0–0+=) 7...Bc5 (7...dc4 8.Bc4 Bc5 9.d4+=) 8.cd5= 0–0 9.Nc3 Nb6 10.Qc2 Bf5 11.Nge2 (11.f3 Nfd5 (11...Nbd5 12.fe4 Bg6 13.Nd5 Qd5 14.Bf6+–) 12.fe4 Bg6 13.Nd5 Qd5+–) 11...Rc8 (11...Nbd5 12.Nd5 Qd5 13.Bf6 gf6 14.Nc3+=) 12.Ng3= The pressure on e4 grows 12...Bg6 13.h4 (13.Rc1 Bd6+=) 13...h6 (13...Bd6 14.h5 Bg3 15.hg6 Bf2 16.Kf2 fg6 17.Qb3+–) 14.h5 Bh7 15.Be2 (15.Rc1 A) worse is 15...Nfd5 16.Nge4 (worse is 16.Nce4 Be3 17.Qd1 Rc1 18.Qc1 Bf4–/+) 16...Bd6 17.Bd3=; B) 15...Bd6–/+) 15...Nbd5–/+ (15...Nfd5?! 16.Nge4 (worse is 16.Nce4 Be3 17.Qd3 Bc5+=) 16...Re8 17.d3=) 16.Qb3 (16.Nd5 Qd5 17.Bf6 gf6+=) 16...Nb6 (16...Nc3 17.dc3 Qc7 18.c4–/+) 17.Rd1 Bd6 (17...Qd6 18.Nb5 Qe7 19.Na7+=) 18.Rh3 (18.d4 Bg3 19.fg3 Nbd5+=) 18...Rc5 (18...Be5 19.Rc1–/+) 19.Nb5 Bb8 20.Bc3 (20.Qb4 Qd5+=) 20...Rg5 21.Qb2 Na4 22.Bf6 Nb2 (22...Qf6?! 23.Qf6 gf6 24.Nd4=) 23.Bd8 Rd8 24.Rb1 Nd3 25.Bd3 Rd3 26.Rc1 Threatening mate... how? 26...Rd8 27.Nd4 Ra5 28.Rb1 Bg3 (28...b6 29.Nc6 Rad5 30.Nd8 Rd8 31.Rb4+/–) 29.fg3 (29.Rg3 Rd7 (29...Ra3 30.Rb7 a5 31.Ne6 Ra1 32.Ke2+–) 30.Rc1 f5 31.Rc8 Kf7+=) 29...Rd7+= 30.Rc1 Threatening mate: Rc8 30...f6 31.Rc3 b6 32.Kf2 Rc5 33.Rh1 Rc3 (33...Kf7 34.Ke2–/+) 34.dc3+= Rd5 35.g4 Rc5 36.Rc1 f5 (36...Rc4 37.Ke2+=) 37.Kg3 (37.gf5 Bf5 38.Rd1 Bg4–/+) 37...fg4+= 38.Kh4 Kf7 (38...g3 39.Ne6 Rc6 40.Nd4 g5 41.Kg3=) 39.g3+= Ke7 40.Kg4 Kd6 (40...g6 41.Rh1 Rg5 42.Kf4 gh5 43.Rh4+=) 41.Rf1 (41.Rd1 Ke5 42.Rc1 g6+=) 41...Ke7 42.Rc1 (42.Ne2 g6=) 42...Rg5 43.Kh4 Bf5 44.Nf5 (44.Nc6 Ke6=) 44...Rf5+= 45.Rd1 Rf3 46.Rd4 (46.Re1!?+=) 46...Re3–/+ 47.c4 Kf6 48.a4 Ra3 (48...g5 49.hg6 Kg6 50.Rd6 Kf5 51.g4 Kf4 52.Rf6 Ke5 53.Rh6–/+) 49.Re4 Ra4 50.Rf4 (50.Kg4 g5 51.hg6 Ra1–/+) 50...Ke5 51.Rg4 b5 (51...a6 52.Rf4 b5–+) 52.Rg7?? (52.cb5 Rd4 53.Rd4 Kd4 54.Kg4–+) 52...bc4 (52...Rc4 53.g4 a5 54.Rg6–/+) 53.g4 (53.Re7 Kd6 54.Re4 Kd5–+) 53...c3 54.Rc7 Kd4 (54...Kd4 55.Kg3 a5–+) 0–1. Krausse,Bernd – Vitkevicius,Juozas, CiF, 1990.

5.c4 Nc6 6.b5 Ne7 7.Bf6 gf6 8.d4 Bh6 9.Nc3+= Be6 10.Qh5 Bg7 11.f3 c6 12.fe4 0–0? 13.Bd3 Qa5 14.Nge2 Ng6?? 15.cd5 (15.cd5 Bd7 16.bc6 bc6 17.0–0+–) 1–0. wlittle (2230) – hzane (2025), net–chess.com, 2004.

5.c4 Nc6 6.Nc3 d4 7.ed4 Nd4 8.Nge2 Ne2 9.Be2 Bf5 10.0–0 a6 11.f3 ef3 12.Bf3 c6 13.Re1 (13.Bc6!? bc6 14.Rf5 Qd4 15.Kh1 Qc4 16.Qe1 Kd8 17.Qe3+/-) 13...Be7+= 14.d4 0–0 15.d5 Re8 (better is 15...c5!? 16.Na2 Re8=) 16.dc6+/- Qd1? (better is 16...Qb6 17.c5 Bc5 18.bc5 Qb2 19.cb7 Re1 20.Qe1 Re8+–) 17.Rad1+– (17.Bd1?! bc6 18.Bf3 Rac8+/-) 17...Ne4 (17...b6+–) 18.Ne4 (18.cb7 Rab8 19.Ne4 Kf8+–) 18...Be4 (18...bc6 19.Ng3 Bc2+–) 19.Be4 Bh4 20.g3 Bf6 21.Bf6 gf6 22.cb7 Rab8 23.c5 f5 24.Bg2 (24.Bg2 Rf8 25.c6+–) 1–0. Fournier,Frederic (1815) – angeladrian3, Active, 2011.

5.c4 Nc6 6.Nc3 Bg4 7.Be2 Be2=+ 8.Qe2 g6?? 9.cd5+– Nd5?? 10.Nd5 Qd5 11.Bh8 f5 12.Nh3 0–0–0 13.Nf4 Qd7 14.Bc3 Bg7 15.0–0 Bc3 16.dc3 Qd2 17.Qd2 Rd2 18.Rfd1 Rc2 19.Rd5 Rc3 20.Ne6 b6 21.Nf8 Ne7 22.Rd2 h5 23.a4 Rc4 24.b5 c6 25.Rd6 cb5 26.ab5 Kc7 27.Rad1 Rb4 28.Ne6 (28.Ne6 Kb8 29.Rd8 Nc8 30.Rc1 Rb5 31.Rcc8 Kb7 32.Rb8 Ka6 33.Nc7 Ka5 34.Nb5 Kb5 35.Rd7+–) 1–0. thedesertfox (1930) – jsivage, net–chess.com, 2004.

5.c4 Bd6 6.d3 (6.cd5 c6=) 6...0–0 (6...dc4 7.de4 Ne4 8.Nc3 (worse is 8.Bg7 Bb4 9.ab4 Qd1 10.Kd1 Rg8–/+) 8...Nc3 9.Bc3=) 7.cd5= Nd5 (7...ed3 8.Nc3+=) 8.de4+= Nb6 9.Nf3 Bg4 (9...a5 10.b5+=) 10.e5+/– Be7 11.Bd3 (11.Qc2 a5 12.Bd3 h6+/–) 11...Nd5 (11...h6 12.0–0+/–) 12.0–0 Bg5 (12...a5 13.Be4 c6 14.b5+/–) 13.Be4 (better is 13.Bh7 Kh7 14.Ng5 Qg5 15.Qd5+–) 13...Ne7?? (better is 13...c6+–) 14.Bh7! Kh8 (14...Kh7 Decoy to h7 15.Ng5 Discovered attack) 15.Qd8 Rd8 16.Ng5 g6 (16...Be6+–) 17.e6 f6 (17...Rd4 18.Bd4 f6 19.Bf6) 18.Bf6 1–0. b4_player – opponent, gamecolony.com, 2007.

5.c4 Bd6 6.cd5= Nd5 (6...c6 7.dc6 Nc6 8.d3+=) 7.Nc3 (7.d3!? ed3 8.Bg7+=) 7...Nc3= 8.dc3 f6 9.Bc4 Bf5? (9...Qe7 10.Nh3+=) 10.Ne2 (better is 10.Qd5!? Qc8 11.Qf7 Kd8 12.Qg7+/-) 10...Nc6= 11.Ng3 (11.Nd4 Nd4 12.cd4 Qd7=) 11...Qd7 (better is 11...Bg3!? 12.hg3 Ne5+=) 12.Nf5+= Qf5 13.0–0 (13.Qd5 Qg4 14.Qf7 Kd8+/-) 13...Qg5 (13...Qe5 14.g3=) 14.g3 (14.Qd5 Qe5 15.Qe5 Be5 16.Bd5+=) 14...Qh6 (better is 14...0–0–0!? 15.Be6 Kb8=) 15.Qd5 Qg6 16.Rad1 (16.Ba6! Nd8 17.Rad1+/-) 16...0–0–0+= 17.b5 (better is 17.Ba6 Qe8 18.Bb5+=) 17...Bg3?? (better is 17...Ne5+=) 18.hg3?? (better is 18.Qe6 Kb8 19.fg3+– (19.bc6? Be5 20.Kh1 Rd1–+)) 18...Rd5–+ 19.Bd5 Ne5 20.c4 Nf3 21.Kg2 f5 22.Rh1 h5 23.a4 h4 24.Be5 Qg4 25.Bf4 h3 26.Kf1 h2 27.a5 Qh3 28.Ke2 Ng1 29.Rdg1 hg1Q 30.Rg1 0–1. Fournier,Frederic – NN, jeu.europe–echecs.com (1+0), 2013.

5.d3 c5 6.bc5= Qa5 7.Qd2 Qc5 8.Ne2 (8.Bf6 gf6 9.Nc3 f5=) 8...Nc6 (8...Be7 9.Bd4 Qc6 10.de4 de4 11.Bf6 Bf6 12.Nd4 Bd4 13.Qd4=) 9.Ng3 Bg4 (9...Qe7!?=) 10.Bf6+= gf6 11.d4 (11.de4 de4 12.Ne4 Qe5+=) 11...Qb6 12.Nc3 (12.c4 Na5 13.c5 Qd8 14.Bb5 Nc6+=) 12...Rd8 (12...Qa5 13.Ra2=) 13.h3 Be6 14.Be2 (14.Nh5 Ke7=) 14...Bd6 (14...Rd7!?=) 15.Nh5 (15.Rb1 Qc7 16.Nb5 Qe7 17.Nd6 Rd6+/–) 15...Ke7 16.Rb1 Qc7 17.Nb5 Qc8 (17...Qb6 18.f3+=) 18.Nd6+/– Rd6 19.Nf4 b6 20.0–0 (20.Rc1 Na5+=) 20...Na5 (20...Rg8 21.Kh2+=) 21.Qb4 (21.Rfd1 Rg8 22.Kh2 Nc4+=) 21...Rg8 22.Kh2 Qc7 23.Rfc1 (23.f3 A) 23...Qc2?? 24.Rfc1 (24.Ne6?! Nc6 25.Qe1 ef3=) 24...Qa2 25.Rb2 Qb2 26.Rc7 Bd7 27.Qb2+–; B) 23...Nc6 24.Qe1 Nd8+=) 23...Nc6 (23...Nc4 24.Bc4 Qc4 25.Qd2=) 24.Qb5 (24.Qc3 Kd8+=) 24...Bd7 (24...Na5 25.Qa4+=) 25.Qb2 (25.Kh1 Kd8 26.Nd5 Qb7+/–) 25...Na5+= 26.Qb4 White launches an attack 26...Be6 (26...Ke8 27.Kh1+=) 27.c4 dc4 28.d5 (28.Ne6?! fe6 29.g3 Rc8=) 28...Bf5 29.Bc4 Rc8 (29...Nb7 30.Ba6 Nc5 31.Qd2+=) 30.Bd3 Qc1 31.Rc1 Rc1 32.Be2 (32.Be4 Rc4 33.Bf5 Rb4 34.ab4 Nb3+/–) 32...Rc5 (32...h6 33.Nh5 Rc5 34.Ng3 Rcd5 35.Nf5 Rf5 36.Qe4 Re5 37.Qa8+=) 33.g4 Bg6 34.h4 h6 35.Ng6 fg6 36.Qe4 Kf7 37.Bd3 Rcd5 (37...f5 38.gf5 g5 39.f6 Rf6 40.hg5 hg5 41.Kg3+–) 38.Qg6 Ke7 39.Bf5 Rd2 40.Kg3 (40.Kg3 Nc6 41.h5+–) 1–0. Boe,Mads – Olsen,Aage, Aarhus, 1992.

5.d3 c5 6.bc5 Bc5 7.de4 0–0 8.ed5 Nd5 9.Nf3 Nf6 (9...Nc6 10.c4 Nc7 11.Nc3+=) 10.Bd3 (10.Qd8!? Rd8 11.Bf6 gf6 12.Bd3+/-) 10...Bg4 11.Nbd2 Nc6 12.0–0 Qc7 (12...Rc8 13.h3 Bh5 14.Qb1+/-) 13.h3 Bh5 14.Qc1 (14.Bf6 gf6 15.Ne4 Be7+–) 14...Rad8 (14...Be7 15.Rb1+/-) 15.Rd1 (15.Bf6 gf6 16.Qb2 Ne5+/-) 15...Bd6 (15...Be7 16.Qb1+=) 16.Be2 (16.Bf6 gf6 17.Rb1 Be5+/-) 16...Qe7 17.Nc4 Bc7 18.Rd3 b5 19.Ncd2 Bf3 20.Nf3 (20.gf3?! Nd5 21.Rb3 a6+=) 20...Rd3 21.cd3 Qd6 22.Qc3 Re8? (better is 22...Ba5!? 23.Qb3 a6+/-) 23.Rc1+– Re6 24.g3 (better is 24.Qc5!? Nd5+–) 24...Bb6+/- 25.Kf1 Qd7 26.d4 Rd6 27.Bb5 Qh3 28.Ke2 Nd4? (better is 28...Ne7!?+/-) 29.Nd4 (29.ed4 Qh5 30.Qb3 Re6 31.Kf1 Qh1 32.Ng1 Qb7+–) 29...Qh5 (better is 29...Rd4 30.ed4 Qh5 31.Ke1 Qb5 32.Qc8 Ne8+–) 30.Nf3?? (better is 30.g4 Qg4 31.Nf3+–) 30...Qb5–+ 31.Ke1 (31.Qc4 Qb2 32.Rc2 Qa3 33.Ra2–+) 31...Ba5 32.Nd4 Bc3 (32...Qb2! 33.Qa5 Qc1 34.Ke2–+) 33.Bc3 Qb7 34.Ke2 (34.f3 Rd8 35.Bd2 Nh5–+) 34...Ne4 35.Bb4 Rd8 (35...Rh6 36.g4 Rh2 37.Be1–+) 36.Nc6 Qa6 (36...Qb5 37.Ke1 Qh5 38.Nd8 Qh1 39.Ke2 Qc1 40.Nf7 Kf7 41.g4–+) 37.Ke1 (37.Kf3 Ng5 38.Kg2 Qb7–+) 37...Re8 38.Rd1 Qc6 (38...Qc6 39.Rd4 Ng3–+) 0–1. Fournier,Frederic – aqwed, Active, 2004.

5.d3 c5 6.bc5 Bc5 7.de4 de4 8.Qd8 Kd8 9.Bc4 Ke7 10.Nc3 Be6 11.Bb3 Rd8 12.Nge2= Nc6 13.Nf4 Bb3=+ 14.cb3 Rd7 15.Ke2 g5 16.Nh3 h6 17.Rhd1 Rad8 18.Ng1 a5 19.h3 Rd1 20.Rd1 Rd1 21.Kd1 Ke6 22.Nge2 1–0. alaamattar (2145) – kramavarma (2045), net–chess.com, 2006.

5.d3 Nc6 6.d4 a5 7.b5 Ne7 8.c4 c6 9.cd5 cd5 10.a4 Nf5 11.Ne2 Bb4 12.Bc3 Nd6 13.Nf4 Nc4 14.Bc4 dc4=+ 15.0–0 g5 16.Ne2 Qd6 17.Bb2 Ng4 18.Ng3 Qh6? 19.h3+/– Nf6 20.Qc2 c3 21.Nc3 Bh3? 22.gh3 Qh3 23.f3 Qg3–/+ 24.Qg2 Qg2 25.Kg2 Bc3 26.Bc3 Nd5 27.Bd2=+ Rc8 28.fe4 Rc2 29.Rf2 Nc3 30.Bc3 Rc3 31.Re2 0–0 32.Kg3 Re8 33.e5 Kg7 34.Kg4 Kg6 35.Kf3 Kf5 36.Rg2 h5 37.Rf1= h4 38.Ke2+/– Kg6 39.Rf6 Kh5 40.Rf7 Rc2 41.Kf3 Rg2 42.Kg2 g4 43.Rf5 Kg6+/– 44.e4 Rc8 45.e6 Rc2 46.Kf1 g3?? 47.e7+– Rc1 48.Kg2 Rc2 49.Kh3 Rh2 50.Kg4 g2 51.e8Q Kh7 52.Rh5 Kg7 53.Qe7 Kg8 54.Rg5 Kh8 55.Qg7# 1–0. KingBrodie – Natron, Caissa.com, 2004.

5.d3 Nc6 6.de4= Ne4 7.Bb5 (7.Nf3 Bg4=) 7...Qg5=+ 8.Bc6 (8.g3 Bg4 9.Ne2 Bf3=+) 8...bc6–/+ 9.Kf1 Ba6 10.Ne2 c5 11.Nd2 Nd2 12.Qd2 cb4 13.ab4 Bc4 14.Bc3 (14.Bd4 Bd6=+) 14...c5 15.bc5 Bc5 16.Kg1 0–0 17.h4 Qg4 (17...Qe7 18.Nd4=) 18.f3 (18.Nd4 Qh5=+) 18...Qe6 (18...Qf5 19.Bd4 Bd6 20.Ra7 Ra7 21.Ba7–/+) 19.Nd4 (19.Bd4 Bd6=+) 19…Qe5 ½–½. Unger – Lindberg,Rune, corr 3GMM–16, 1995.

5.d3 d5 6.Nd2 Qe7 (6...a5!?= must be considered) 7.Bf6 gf6 (7...Qf6 8.de4 a5 9.Rb1+/–) 8.c4 (8.de4 de4 9.Nb3 a5+/–) 8...ed3 (8...d4 9.de4 (worse is 9.Ne4 f5 10.Ng3 de3+=) 9...de3 10.fe3+/–) 9.Bd3 (9.cd5 Qe5 10.Rc1+=) 9...d4 10.Qe2 (better is 10.e4+=) 10...Bh6? (better is 10...de3 is a viable option 11.Qe3 Qe3 12.fe3 a5 13.ba5 Ra5+=) 11.ed4+– Bd2 (11...Nc6 12.Qe7 Ne7 13.Nb3+/–) 12.Kd2 Qe2 (12...Nc6 13.Re1 Qe2 14.Ne2+– (14.Be2?! Nd4 15.Bf1 Kd8=; 14.Re2?! Kf8+/–; 14.Ke2?! Nd4 15.Kd2 Ne6+=)) 13.Ne2 Be6 (13...Nc6 14.Rhe1+–) 14.Rhd1 (14.Rae1 Kd8+–) 14...Nd7 15.Nf4 White plans c5 15...0–0–0? (15...Nf8 16.Re1 Kd8 17.Nh5+–) 16.h3 (better is 16.d5!? seems even better 16...Rhe8+–) 16...Nb6 (16...Nf8 17.d5 Bd7 18.Nh5+–) 17.Ne6 (better is 17.d5!? Bd7 18.c5+–) 17...fe6+/– 18.c5 White threatens to win material: c5xb6 (18.Kc3+/–) 18...Na4 (18...Nd5 19.Bc4+/–) 19.Ke3 (better is 19.Kc2!? c6 20.Bc4+–) 19...Nb2 Black threatens to win material: Nb2xd1 20.Rd2 Na4? (better is 20...Nd3 21.Rd3 Rd5+/–) 21.Bc4+– Rhe8 (21...e5 22.de5 Rd2 23.Kd2 fe5 24.Be6 Kd8+–) 22.Bb5 c6 (22...Nc3 cannot undo what has already been done 23.Be8 Re8 24.Rc1 Nd5 25.Ke2+–) 23.Ba4 e5 (23...Rd7 doesn't change anything anymore 24.b5 Rc7 25.bc6 bc6 26.Rb2+–) 24.d5! Deflection: c6 24...b5 (24...cd5 25.Be8 Deflection Pinning; 24...Rd5 25.Rd5 cd5 26.Be8 Deflection Pinning) 25.Bb3 (25.cb6!? and White can already relax 25...ab6 26.Bc6 Rg8+–) 25...cd5 26.Rd5 f5 (26...h5 does not win a prize 27.Rd8 Kd8 28.Rd1 Kc7 29.Bf7+–) 27.Rad1 f4 (27...Rd5 doesn't get the bull off the ice 28.Rd5 h5 29.Rd6+–) 28.Ke4 Rd5 29.Rd5 Re6 (29...Rg8 a last effort to resist the inevitable 30.Re5 Rg6+–) 30.Rd8! Discovered attack: d5, b3–e6 30...Kd8 31.Be6 Kc7 32.Ke5 Kd8 33.Kf4 Ke7 34.Bb3 Kf6 35.Kg4 (35.c6 Ke7 36.Ke5 h6 37.Be6 Kd8 38.Kd6 Ke8 39.c7 Kf8 40.c8Q Kg7 41.Qg8 Kf6 42.f4 h5 43.Qg5) 35...Ke7 36.Kh5 Kd7 37.Kh6 Kc6 38.Kh7 a6 39.Kg7 a5 40.h4 a4 (40...Kc7 does not save the day 41.h5 Kd7 42.h6 ab4 43.h7 Kc6 44.ab4 Kd7 45.h8Q Kc7 46.Bd5 Kd7 47.Qb8 Ke7 48.Qd6 Ke8 49.Bc6) 41.Ba2 Kd7 42.h5 Ke7 43.h6 Ke8 44.h7 Ke7 45.h8Q Kd7 46.Qh3 Kc7 47.Qe6 Kd8 48.Qf7 Kc8 49.Be6 Kb8 50.Qd7 (50.c6 Ka8 51.Qb7) 50...Ka8 51.Bd5 Kb8 52.Qb7 1–0. Istratescu,Cezar – Ionescu,Cosmin, ROM–ch U10 Sovata (11), 2002.

5.d3 Nbd7 6.Nd2 a5 7.b5 Nc5 8.Bf6 Qf6 9.d4 Nd7 10.c4 c6 11.Ne2 Be7 12.Nf4 Qd6 13.f3 Qh6 14.cd5 (worse is 14.fe4 Bh4 15.Ke2 dc4 16.Nc4 cb5= 17.Nd2 Nf6 18.Qb1 Bd7+= 19.e5=; 14.bc6 bc6 15.fe4 Bh4 16.Ke2 Nf6 17.ed5 cd5 A) 18.Qb3 0–0= (18...Bg4 19.Nf3=) 19.Nd5=; B) 18.Qb1 Bg4 19.Nf3=) 14...Bh4 15.g3 (15.Ke2 ef3 16.Nf3 cb5 17.Nh4 Qh4+= 18.Qb3 0–0=) 15...Bg3= 16.hg3 Qh1 17.dc6 Nf6 (17...bc6 18.bc6 Nf6=) 18.Qc2 (18.Ne4!? Ne4 19.fe4 bc6 20.Qc2+=) 18...ef3+= 19.Qc5 f2 20.Ke2 (20.Kf2 Ne4) 20...h6 21.cb7 Bb7 (worse is 21...Qb7 22.Bg2 Qa7 23.Nc4 Qc5 24.dc5+/–) 22.Rc1 Nd5 23.e4 Nf4 24.gf4 f6 25.Qd6 Rc8 26.Qe6 (26.Qe6 Kd8 27.Qb6 Ke8 28.Rc7 Qh5 29.Ke3 Rc7 30.Qc7+–) 1–0. Woelfelschneider,Peter – Wrede,Christian, TT–11 ETC, 2004.

5.d3 Be7 6.Nc3 Bf5 7.d4 0–0–/+ 8.Be2 c6 9.b5 Qd7 10.a4 Qe6 11.f3? Bb4 12.g4 ef3 13.Nf3? Bg4 14.h3?? Bf3 15.Bf3 Qe3 16.Qe2 Re8 17.Rh2 Qf4 18.Qe8 Ne8 19.Rf2 Qd4 20.Rd1 Bc3 21.Bc3 Qc3 22.Rdd2 Nf6 23.Kf1 Nbd7 24.Rd3 Qe5 25.Re2 Qf5 26.Kg2 Ne5 27.Rde3 Nf3 28.Rf3 Qh5 29.Ref2 Re8 30.Rf4 Re2 31.Rb4 Rf2 32.Kf2 Qf5 33.Kg2 Qc2 34.Kf1 Ne4 35.Re4 Qe4 36.bc6 bc6 37.h4 d4 38.Kf2 d3 39.Kg3 0–1. Goof – Long_Knights, ChessWorld.net, 2005.

5.d3 Be7 6.de4= de4 7.Qd8 Bd8 8.Ne2 Bf5 (8...Be7 9.Nd4=) 9.Nd2 0–0 (9...Nc6 10.Ng3 Bg6 11.Rd1+=) 10.Ng3 Bg6 11.h4 h6 (11...h5 12.0–0–0 Re8 13.Bc4+=) 12.h5 (12.0–0–0 Re8+=) 12...Bh7= 13.0–0–0 Nbd7 (13...Re8 14.Bb5 c6 15.Bc4=) 14.Bc4 (14.Nde4 Be4 15.Ne4 Ne4 16.Rd7 Nf2 17.Rg1+=) 14...Re8 15.Nb3 Be7 16.Na5 Rab8 17.Rd2 Bf8 (17...Nb6 18.Rhd1=) 18.Bb5 (18.Rhd1 Ne5+=) 18...c6= 19.Be2 Nb6 (19...c5 20.Bb5 Re7+/–) 20.Bf6+/– gf6 21.Rhd1 c5 22.c3 cb4 (22...Rbc8 23.b5 (23.Nb7?! cb4 24.ab4 Rc3 25.Kb2 Bb4=) 23...Rb8 24.Nc4+/–) 23.cb4 (23.ab4 Rbc8 24.Rc2 Re7+=) 23...Rec8 24.Rc2 f5 25.Nc4 f4 26.ef4 e3 27.f5 (27.fe3 Bc2) 27...Nc4 28.Bc4 ef2 (28...b5 29.Bd5 ef2 30.Kb1 Rc2 31.Kc2–/+) 29.Bd3 (better is 29.Rd7!?+/–) 29...a5 30.ba5 Ba3 31.Kb1 Rc2 32.Kc2 Ra8 33.a6? (better is 33.Rf1=) 33...ba6–/+ 34.Rf1 Rc8 (34...Bd6 35.Ne4 Rc8 36.Kd1 Be5=) 35.Kd2+= Bb4 36.Ke2 a5 37.Ne4 Kg7 38.Rf2 f6 39.Rf4 Kf7 40.Ke3 Rc1 41.Bb5 Ke7 42.Rf3 Bc3 43.Rf2 Be5 44.g4 Rb1 45.Bc4 ½–½. Pommerel,Wim – Woischke,Norbert, CiF, 1991.

5.d3 Be7 6.de4 Ne4 7.Bg7 Rg8 8.Bb2 Bf6 9.c3 Be6 10.Ne2 Bh4 11.g3 Bf6 12.Nf4 c6 13.Ne6 fe6 14.Bd3 Qd7 (14...Qe7 15.Qh5 Kd8 16.Be4 de4 17.Nd2+–) 15.Be4 de4 16.Nd2 Qd5 (16...Qf7 17.Ne4 Be7 18.c4+–) 17.c4 Qf5 18.Bf6 Qf6 19.Ne4 Qe5 20.Nd6 Ke7 21.Nb7 Na6?! (21...Qc3 22.Kf1 Qc4 23.Kg1+–) 22.0–0 White plans c5 22...Rab8 23.Na5 Qc7 24.c5 Rb5 (24...Rg7 25.Qa4 Rc8 26.Nc4+–) 25.Nc4 Rbb8 (25...Nc5 26.bc5 Rc5 27.f4+–) 26.Qa4 Nc5 27.bc5 Rb5 28.Qc2 Rg6 29.Nd6 Qa5 (29...Rb8 30.Rab1 Kf8 31.Qe4+–) 30.Nb5 Qb5 31.Rfb1 Qa6 32.Rb8 Qa5 33.Rb7 Kf6 34.Qc4 Rg5 35.Qf4 Rf5 36.Qh4 Ke5 (36...Rg5 37.Qh6 Kf5 38.Qf8 Kg4 39.f3 Kh5 40.Rh7 Kg6 41.Qf7) 37.Qd4 1–0. pierre – tata_romy, ChessHere.com, 2005.

5.d3 Bf5 6.Nc3 Be7 7.Nge2 0–0 8.Ng3 Bg6 9.de4 de4 10.Bc4 Nbd7 11.0–0 c6 12.Qe2 b5 13.Bb3 Qc7 14.Rad1 Nb6 15.Rd4 Rad8 16.Rfd1 Rd4= 17.Rd4 Rd8 18.Qd2 Rd4= 19.Qd4 Bd6 20.Nge4 Bh2= 21.Kh1 Be5 22.Nf6 Bf6 23.Qd2 Nd7 24.Nd1 h5 25.c4 a6 26.cb5 cb5 27.Nc3 Ne5 28.Nd5 Qb8 29.Nf6+/– (29.Nf6 gf6 30.Bd5+/–) 1–0. khani9 – willow27, ChessWorld.net, 2007.

5.d3 Bf5 6.de4 Ne4 7.Nf3 Nd7 (better is 7...a5!? 8.b5 c6+=) 8.Qd5+/– Bg6 9.Qb7 Ng5? (better is 9...Nd6 10.Qc6 Be4+–) 10.Ng5 Rb8 11.Qa7 Qg5 12.Qc7 f6 (12...Qf5 13.Nc3+–) 13.Qc6 (13.c4 Bc2+–) 13...Be7 (13...Qf5 14.Nc3 Bf7 15.Nb5+–) 14.c4 (14.Nc3!? Bc2 15.Nd5 Qf5+–) 14...Rb6 15.Qc8 Bd8 16.c5 (better is 16.Bd4 Rd6 17.Nc3 0–0+–) 16...Re6 (16...Nc5 17.Bd4 (17.Qc5 Qc5 18.bc5 Rb2=; < 17.bc5 Rb2 18.Bb5 Rb5 19.Qc6 Kf8 20.Qb5 Qg2+–) 17...Nd7 18.Bb6 Nb6 19.Qe6 Kf8 20.Qd6 Kf7 21.a4+–) 17.c6 Ne5 (17...Re3 18.fe3 Qe3 19.Be2 Nb6+–) 18.Qe6 Be7 19.c7 (19…Kf8 20.c8Q Be8 21.Bb5 Nf3 22.gf3 Qb5 23.Qc7+–) 1–0. kamret (2170) – Jack_D (2020), GameColony.com, 2003.

5.d4 Nbd7 6.Bb5 (6.c4 dc4 7.Qc2 b5+=) 6...c6 (6...a5 7.Qd2–/+) 7.Be2 Nb6 (7...Bd6 8.c4–/+) 8.c3 (8.Nd2 Na4 9.Qc1 b5–/+) 8...a5 (8...Bd6 9.Nd2–/+) 9.Nd2 Bd6 10.Nb3 (10.ba5 Ra5 11.c4 Nc4 12.Nc4 dc4 13.Bc4 Rg5–/+) 10...ab4 (10...Na4 11.Qc2 Nb2 12.Qb2 ab4 13.ab4 Ra1 14.Na1–/+) 11.ab4 Ra1 12.Qa1 0–0 (12...Qc7 13.h3–/+) 13.Nd2 (13.Ba3 Qe7–/+) 13...Bf5 (13...Qc7 14.h3–/+) 14.Bd1 Ng4 (14...Qc7 15.Ne2–/+) 15.Nh3 (15.h3 Nf6–/+) 15...Nh2 (15...Qh4 16.Nf1–+) 16.Nf4 g5 (16...Ng4 17.Rh5 Qd7 18.Qa5–+) 17.Ne2 (17.Nh5 Bg4–/+) 17...Bg4 (17...g4 18.g3 Nf3 19.Nf3 ef3 20.Nf4–+) 18.Nf1 (18.Qa5!?–/+) 18...Nf1–+ 19.Kf1 f5 (19...Nc4 20.Ke1–+) 20.Ng1 (20.Bb3–+) 20...Nc4 21.Bg4?! (21.Be2 Be2 22.Ne2–+) 21...fg4 22.Ke2 (22.Bc1–+) 22...Qf6 (22...Qf6 23.Qf1 Nb2–+) 0–1. Rohner,Michael – Seckler,Siggi, desc–online.de, 2003.

5.d4 Be6 6.Nd2 a5 (6...Be7 7.Ne2+=) 7.b5 c6 (7...Bd6 8.c4+=) 8.bc6 (8.Rb1 Be7+=) 8...Nc6 9.Ne2 (9.Rb1 Rc8+=) 9...b5 (9...Bd6 10.c4 dc4 11.Nc3+=) 10.Nf4 Rb8 11.Ne6 fe6 12.f3 ef3 13.Nf3 Bd6 14.Bd3 0–0 15.0–0 a4 16.Qe1 Ne4 17.Qe2 Exerts pressure on the backward pawn (17.Be4 de4 18.Nd2 Rf5=) 17...Na5+= 18.Be4 (18.Ra2 Nc4–/+) 18...de4–/+ 19.Nd2 Rf5 (19...Bh2 20.Kh2 Qc7 21.Rf4 Qc2 22.Rf8 Rf8 23.Qb5 Qd2 24.Qb6–/+) 20.Ne4 (20.g3 Qd7=) 20...Bh2 21.Kh2 Decoy to h2 21...Qh4 Theme: Double Attack 22.Kg1 Qe4 23.Qd3 Qg4 (23...Rf1 24.Rf1 Qd3 25.cd3+=) 24.e4 Rf1 25.Rf1 Nc4 ½–½. Vetter,Udo – Perlitz,Heiko, TT–11.20 ETC, 2004.

5.d4 Be6 6.Ne2+=.

5.d4 Bg4 6.Be2 Be2 7.Qe2 b6 8.g4 c5 9.g5 (9.g5 Nfd7 10.Nh3=+). riverborne – kong2, Live Game Caissa's Web, 2006.

5.d4 Bg4 6.Ne2 Bd6 7.Nd2 0–0 8.c4 c6 9.h3 Bh5 10.Qb3 Na6 11.g4 Bg6 12.c5 Be7 13.Nf4= Nc7 14.Ng6 hg6 15.Bg2 b6 16.cb6 ab6 17.Rc1 Qd7 18.f3 Qd6 19.fe4+/– de4 20.Ne4+– Ne4 21.Be4 Qg3? 22.Ke2 Qd6? 23.Rc6 Qd8 24.Rb6 Rc8 25.Rg6 Kh8 26.Rc6 Bf6 27.Rhc1 Qd7 28.Bb1 Ne6 29.Qc2 Rc6 30.Qh7 1–0. woschkat – nbarletta, net–chess.com, 2000.

5.d4 Ng4 6.Be2 Nf2?? 7.Kf2+/– Qh4 8.g3+– Qf6 9.Kg2 Qh6 10.c4 c6 11.cd5 cd5 12.Qc2 Bd7 13.Qc7 Bc6?? 14.Qc8 Ke7 15.Nc3 Qe3 16.Nh3 Qh6 17.Nf4 Nd7 18.Qa8 g6 19.Ncd5 Kd6 20.Qa7 g5 21.b5 gf4 22.bc6 f3 23.Kf2 fe2 24.cd7 Kd5 25.d8Q Qd6 26.Qd6 Bd6 27.Ke2 Re8 28.Qb7 Ke6 29.Rhf1 f5 30.d5# 1–0. cetnik – TalibanMaster (1685), caissa.com, 2006.

5.Be2 c5 6.bc5 Bc5 7.d3 0–0 8.Nd2 d4 9.ed4 Bd4 10.Bd4 Qd4 11.de4 (11.c3 Qd5 12.de4 Ne4=) 11...Ne4 12.Ne4 Qe4 13.Kf1 (13.Nf3 Re8+=) 13...Nc6 14.Bd3 Qe5 15.Nf3 Qf6 16.Rb1 b6 17.Qc1 Bf5 (17...Re8 18.Qg5 Qc3 19.Qh4+=) 18.Ne1 (18.Qg5!? Bd3 19.cd3–/+) 18...Rfe8 19.Qb2 Bd3 20.cd3 Nd4 21.Nc2 Re2?? (better is 21...Nc2 22.Qc2 Rac8–/+) 22.Qd4+= Rc2 Do you see the mate threat? 23.Qe3? (23.Qf6 gf6 24.d4 Rd2+=) 23...Qe6 (better is 23...Rac8!?–/+) 24.Qe6+= fe6 25.Ra1 (25.Re1 Rd8 26.Re6 Rd3 27.Re8 Kf7–+) 25...Rd8–/+ 26.h4 (26.Rd1!?–/+) 26...Rd3–+ 27.Rh3 (27.Re1 Rdd2 28.Kg1 Rf2 29.Re6 Rg2 30.Kf1 Rg3–+) 27...Rh3 28.gh3 Rc4 (28...e5 29.Re1 Ra2 30.Re5 Ra3 31.Re7–+) 29.Kg2 Rh4 (29...Rc3 30.f4–+) 30.Re1 Kf7 31.Kg3 Rc4 32.Re3 b5 33.f4 Kf6 34.h4 a5 (34...a5 35.Re5 b4 36.ab4 ab4–+) 0–1. Szczepaniak,Alicja – Ewert,Jerzy, corr 1AMM Poland, 1991.

5.Be2 Bd6 6.Nc3 =+.

5.Be2 Bd6 6.c4 0–0 7.c5 Be7 8.Nc3 a5 9.Qb3 ab4 10.ab4 Ra1 11.Ba1 Be6 12.f3? (better is 12.Qb2+=) 12...d4–+ 13.Qa4 dc3 14.Bc3 ef3 15.Bf3 Bd5 16.Ne2 Bf3 17.gf3 Nd5 18.0–0 (18.Qa1 Bh4 19.Kf1–+) 18...Nc3 19.dc3 Qd3 20.Kf2 Bh4 21.Kg2 (21.Ng3–+) 21...Qe2 22.Kg1 Qe3 23.Kh1 Qc3 24.Kg2 (24.Qb5 Nc6 25.Qb7 Qd3–+) 24...Rd8 25.Kh3 (25.Rd1 Nc6 26.Rd8 Bd8–+) 25...g5 26.Qa5 (26.Qb5 Qe5 27.Qc4–+) 26...Qd3 27.Qa1 Qf5 28.Kg2 Rd2 29.Kh1 Qh3 0–1. Neumann,Frank – Laureles,Raymundo, OP–2011–0–01638, 2011.

5.Be2 Bd6 6.g4 0–0 7.h4 Qe7 (7...a5 8.b5–/+) 8.Nc3+= c6 9.g5 Nfd7 10.f4 ef3 (10...a5 11.h5–/+) 11.Nf3+= Bg3 12.Kf1 Bd6 13.Kg2 Ne5 (13...b5 14.Nd4 Qe5 15.Qe1–/+) 14.Ne5 (14.e4 Ng6 15.ed5 Nf4 16.Kf2 cd5+=) 14...Qe5–/+ 15.Qe1 f6 16.Bf3 0–1. Giertli,Vladimir (2125) – Matejov,Jaroslav (2255), SVK–chT2C, 2006.

5.Be2 Be7 6.c4 c6 7.c5 Be6 8.Nc3 0–0 9.f3 Nbd7 10.fe4 de4 11.Qc2 Bf5 12.Bc4 Qc7 13.Nge2=+ b5 14.cb6 ab6 15.Nd4+= Bg6 16.b5 c5 17.Nc6 Bd6 18.Nd5 Nd5 19.Bd5 Rae8 20.0–0 Bh2–/+ 21.Kh1 Kh8 22.Qc3 Be5 23.Ne5 Ne5 24.a4 f6–/+ 25.a5 Ng4 26.a6?? Qh2 0–1. mgriffin (1690) – nhoj, net–chess.com, 2001.

5.Be2 Be7 6.c4 c6 7.cd5 cd5 8.Nc3= Bf5 9.d3 0–0 10.de4 de4 11.Nh3 Bh3=+ 12.gh3 Qc7 13.Rc1 Nc6 14.Nd5 Qd8= 15.Ne7 Qe7=+ 16.Qb3 Rad8 17.b5 Na5 18.Qc3 b6 19.Rg1 Kh8 20.Qc7 Rd7?? 21.Qg3 g6 22.Qg4 Rd6= 23.Rc2 Kg8 24.Qf5 Rfd8 25.Qg5 Qd7 26.Bd4 Nb3 27.Bf1? Nd4–+ 28.ed4 Rd4 29.Rg3?? Rd1 30.Ke2 Re1!! 31.Ke1 Qd1# 0–1. Psion – Psion, 4 Min/Zug, 1989.

5.Ne2 Bg4 6.d3 Qe7 7.Nd2 Nbd7 8.h3 Bh5 9.g4 Ng4 10.hg4+/– Bg4 11.de4 de4 12.Bh3 Bh3 13.Rh3 f5 14.Nf4 0–0–0 15.Qe2 Ne5 16.0–0–0 g5 17.Nh5 Rg8 18.Nc4 Rd1 19.Qd1 Nc4 20.Qd5 Nb2 21.Qg8 Na4 22.Ng3 f4?? 23.Ne4! Qe4 24.Qf8 Kd7 25.Qf7 Kc6 26.Rh6 Kb5 27.Qd7 c6 28.Qd3 Qd3 29.cd3 fe3 30.fe3 Nc3 31.Rh7 Kb6 32.Rg7 Nd5 33.e4 Nf4 34.Rg5 Nd3 35.Kd2 Nb2 36.e5 Nc4 37.Kc3 Na3 38.e6 Nb5?? 39.Kd2 Nd6 40.e7 Kc7 41.Kd3 Kd7+= 42.Rg7 Ne8 43.Rh7+= b6 44.Kc4 a6 0–1. bratek55 – kumanova (1735), kurnik, 2011.

5.f3 Nc6 6.fe4 de4 7.Ne2 Bd6 8.Ng3 Bg4 (8...Bg3 9.hg3 Qd6 10.Qe2 Ng4 11.Rh3 Nh2 12.Rh4 Qg6+=) 9.Be2 h5 (9...Bg3!? 10.hg3 Qd6+= 11.0–0 Be2 12.Qe2 Rg8+=) 10.Bg4+= hg4 11.0–0 (11.Nf5 Rh7 12.d3 Be5=) 11...Be5 (11...Qd7!?+= 12.Qe1 Ne7+=) 12.Be5= Ne5 13.Nc3 Nc4 14.Nce4 Qd5?? (better is 14...Ne4 15.Ne4 Qh4=) 15.Nf6 (better is 15.Rf6 Ne3 16.de3 Qd1 17.Rd1 gf6 18.Nf5+–) 15...gf6 16.Nf5 (better is 16.Qg4!? Nd2 17.Rad1+–) 16...Nd2+/– 17.Rf4 Rh5?? (better is 17...Qe5 18.Rc1 0–0–0 19.Qg4 Kb8+/–) 18.Ng7+– Kd8 1–0. bambinik – Semplice, gameon.it, 2001.

5.f3 Bd6 6.c4 c6 7.cd5 cd5 8.fe4 Ne4 9.Nf3 0–0 10.Bd3 Bg4 11.Rf1 Bf3 12.Qf3=+ Bh2 13.Qg4= Qg5 14.Qg5+= Ng5 15.Nc3 Rd8 16.Rc1 a6 17.Nd5 Nc6 18.Bc4 Ne6 19.Nc3 Ne5+= 20.Be6 fe6 21.Kd1? Nc4–+ 22.Rc2?? Ne3 (22...Ne3 23.Ke2 Nc2–+) 0–1. rommeltdf (1790) – amikhlin (2100), net–chess.com, 2002.

5.Nf3 ef3 6.Qf3 Be7 (6...Nbd7 7.c4 a5 8.cd5 ab4 9.ab4 Ra1–+) 7.Nc3 (7.Qg3 0–0 8.Be2 a5 9.Be5 Ne8–+) 7...0–0 (7...a5 8.e4 de4 9.Ne4 Nbd7–+). Davis,David – Van der Meer,Robert, 1996.

5.Bf6 Qf6 6.Nc3 Be6 7.Nb5 Na6 8.Nd4 c5 (8...Bd7 9.Qh5=) 9.Ne6 (9.Ba6 ba6 10.Ne6 Qe6 11.bc5 Qg6=) 9...Qe6 10.Bb5 Kd8 11.bc5 Nc5 12.Nh3 Bd6 13.Rb1 Rb8 (13...Rc8 14.d4 ed3 15.Bd3=) 14.Qh5 (14.d4 ed3 15.Bd3 d4=) 14...g6 15.Qh4 f6 16.Nf4 Bf4 17.Qf4 Rc8 18.0–0 g5 19.Qg3 h5 20.h4 (20.Rfd1!?+=) 20...gh4+= 21.Qh4 Rc7 22.Rfc1 Qe5 (22...Rg7 23.d4 Rg4 24.Qh3+=) 23.d4+= White is in command 23...ed3 24.cd3 Qf5 (24...Rg8 25.d4 Qe4 26.Qf6 Re7 27.Qd6 Nd7 28.g3+–) 25.Qb4 (25.d4 Nb3 26.Re1 Rc3+=) 25...b6 26.d4 a5 (26...Ne4 27.Qb2+=) 27.Qe1 Nb7 (27...Ne6!?+/–) 28.Bc6 Rg8 29.Rb6 Qf3 Threatening mate: Qxg2 30.g3 h4? (better is 30...Rgg7+–) 31.Rb7 (31.Bb7 hg3 32.Rd6 Ke8 33.Re6 Kf8 34.Rf6 Qf6–+) 31...h3 Do you see the mate threat? 32.Rb8 (32.Qf1 h2 33.Kh2 Rh8 34.Qh3 Qf2 35.Kh1 Rh3) 32...Ke7+/– 33.Bd5! Qd5?? (33...h2 34.Kh2 Qh5 35.Kg1 Rc1 36.Qc1 Rb8 37.Qc5 Kd8 38.Qa5 Ke7 39.Qc7 Kf8 40.Qb8 Qe8 41.Qd6 Qe7+–) 34.Rc7+– Kd6 Threatening mate... how? 35.e4 Rg3 36.fg3 (36.Kh1 Qh5 37.Rc6 Kc6 38.Qc1 Kd7 39.Rb7 Kd6 40.Qc7 Ke6 41.Qd7) 36...Qa2 (36...Qd4 37.Kh2 Kc7+–) 37.Rd8 1–0. Kuperski,Marek – Ewert,Jerzy, corr 1AMM Poland, 1991.

5.h3 a5 6.ba5 Ra5 7.d3 =+.

5.h3 c5 6.Bb5 Bd7 7.Bd7 Nbd7 8.Bc3 (8.bc5 Bc5 9.Ne2 0–0=+) 8...c4 (8...Qb6 9.bc5 Bc5 10.Ne2=+) 9.Ne2 b5 (9...Bd6 10.d3 cd3 11.cd3=+) 10.Nd4 Ne5 (10...Qb6 11.a4 ba4 12.Ra4=) 11.Nf5 (better is 11.Nb5 Qb8 12.Ra2+=) 11...Nd3?? (better is 11...Nfd7=+) 12.cd3+– cd3 13.0–0 Qd7 14.Ng3 h5 15.Bf6 gf6 16.f4 h4 17.Nh5 Rg8?? 18.f5 Bd6 19.Nf6 1–0. PoPer – StartMeUpp, Live Game Caissa's Web, 2004.

5.h3 Be7 6.d3 b6 7.d4 0–0=+ 8.c4 c6 9.c5 b5 10.Ne2 Nbd7 11.Ng3 Re8 12.a4 Ba6 13.a5 g6 14.Be2 Bc8 15.f3 Bf8 16.f4 a6 17.0–0 Bg7 18.f5 Nf8 19.Bg4 Ra7 20.Bc3 Qc7 21.Be1= h5 22.Be2 N8h7 23.h4 Bh6 24.Ra3 Kg7 25.fg6 fg6= 26.Nh1 Ng4 27.Bg3 Qd8 28.Qd2 Nhf6 29.Bf4 Ng8 30.Bh6 N8h6 31.g3 Rf8 32.Rf4 Raf7 33.Rf7=+ Rf7 34.Qe1 g5 35.hg5 Qg5 36.Bg4 Bg4 37.Ra2 Nf5 38.Ra3 h4 39.Nd2 Bh5 40.Nf1 Rf6 41.Ra2 Bf3 42.Rh2 Rh6 43.Rh3? Rg6 44.Qf2 Bh1=+ 45.Kh1 hg3 46.Qg2?? Ne3–+ 47.Ne3 Qe3 (47...Qe3 48.Qb2 Qf2 49.Qf2 gf2 50.Rh7 Kh7 51.Kh2 f1R 52.Kh3 Rh1#) 0–1. Ginger Prince – Pepito Centeno, ChessWorld.net, 2004.

5.h3 Be7 6.Ne2 0–0 7.Nf4 b6 (7...a5 8.b5+=) 8.c4 (8.Be2 a5+=) 8...Bb7 (8...a5 9.cd5 ab4 10.Qc2+=) 9.Nc3 d4 10.ed4 Qd4 11.Qc2 Qd8 12.Be2 (12.Nfd5 Re8+=) 12...a5 (12...c5 13.b5+=) 13.b5 Nbd7 (13...Re8 14.0–0+=) 14.0–0–0 (14.0–0 Bd6 15.Nfd5 Nd5 16.cd5 Re8=) 14...Rc8 (14...Bd6 15.Nfd5–/+) 15.Rhg1 (15.d3 ed3 16.Bd3 c6+=) 15...Bd6 (15...c6 16.d4 ed3 17.Bd3–/+) 16.Nfd5 Nd5 17.Nd5 Bd5 18.cd5 Qe7 19.a4 (19.Qc3 Be5 20.d4 Bh2–/+) 19...Nc5 (19...Ba3 20.d3 e3 21.fe3 Qe3 22.Kb1 Bb2 23.Kb2–+) 20.d3 (20.Kb1 Qh4 21.d3 Rfe8+=) 20...Qg5 (20...e3!? 21.f3 Rfe8–/+) 21.Kb1+= Qd5 22.Qc3 (22.de4!? Qe4 23.Qe4 Ne4 24.Bd4+=) 22...Qg5–/+ 23.Qc4 Nd3 (23...Rfe8 24.d4 Ne6 25.Bc1–/+) 24.Bd3 ed3 25.g3 (25.Rd3 Rfe8–/+) 25...Rfe8 (25...d2 26.f4 Qg6 27.Qc2–+) 26.Qd3 (better is 26.Rd3 Qf5 27.Rgd1–+) 26...Qg6 (better is 26...Bc5!?–+) 27.Qg6+= fg6 (27...hg6 28.Bd4+=) 28.Bd4 (28.Rge1 Re1 29.Re1 Bc5+=) 28...Rcd8 (28...c5 29.Bg7 Bg3 30.fg3 Kg7 31.Rd7 Kg8 32.Rf1+=) 29.Rge1 (29.Kc2 Re2 30.Kb3 Kf7+=) 29...Re1 30.Re1 Bb4 (30...Bg3!? 31.Bb6 cb6 32.fg3 Rd4 33.Re8 Kf7–/+) 31.Re4+= Rd7 (31...Rd6 32.f3=) 32.Kc2= Kf7 33.Kb3 Bd6 (33...Rd6 34.Kc4=) 34.Kc4 Be7 (34...g5 35.Rg4=) 35.Rf4 (35.f3 Bd6 36.f4 g5+=) 35...Bf6+= 36.Be3 (36.Re4 Bd4 37.Rd4 Rd4 38.Kd4 Ke6+=) 36...h6 37.Re4 Rd1 (37...g5 38.Bd4+=) 38.h4= Rd7 39.Kb3 Rd3 40.Kc2 (40.Kc4 Rd8=) 40...Rd7 (40...Rc3 41.Kd2+=) 41.Rc4 (41.Kb3 Re7 42.f3 Be5=) 41...Be5 42.Rc6 Re7 43.Kd3 Rd7 (43...h5 44.Bg5 Rd7 45.Ke3 Bd4 46.Kf3=) ½–½. Heiden,Markus – Stiemer,Soenke (2075), Schleswig Holstein–ch cand–B, 1997.

5.h3 Be7 6.f3 0–0 7.fe4 (better is 7.d3!?–/+) 7...Ne4–+ (< 7...de4 8.Bc4–/+) 8.Qf3 (8.Ne2 Bh4 9.g3 Ng3 10.Ng3 Bg3 11.Ke2 Qg5–+) 8…Bh4 (9.g3 Bg3 10.Ke2 Bd6–+) 0–1. PoPer – xplayer, Live Game Caissa's Web, 2004.

5.c4 a5=+

6.Qa4 Bd7 7.b5 dc4 8.Bc4 Bf5=.

6.Qa4 Nbd7 7.Nc3 dc4 8.Bc4 ab4 9.Qa8 Nb6 10.Qa5 Qd2 11.Kd2 Nc4 12.Kc2 b3 13.Kb3 Na5 14.Kc2 Be6 15.Nge2 Be7 16.Nd4 Bc4 17.Bc1 black timed out 1–0. gumshoe (2325) – chessbuilder (2285), net–chess.com, 2014.

6.b5 dc4 7.Bc4 Nbd7 8.Qb3 The mate threat is Bxf7 8...Nc5 9.Qc2 (9.Bf7!? Ke7 10.Bf6 Kf6 11.Qc4 Nd3 12.Kf1=) 9...Be6–/+ 10.d4?? (better is 10.Be6!? fe6 11.Kf1–/+) 10...ed3–+ 11.Qc1 Nfe4 12.Nf3 d2! 13.Nbd2 (13.Qd2 Nd2) 13...Bc4 14.Qc4 Nd2 15.Nd2 Nd3 16.Ke2 Nb2 17.Qb3 (17.Qc2 Be7 18.Qb2 Bf6–/+) 17...Be7 18.Ne4 (better is 18.Qb2!? Bf6 19.Qc2 Ba1 20.Qe4 Qe7 21.Qb7–/+) 18...Qd7–+ 19.f3 (19.Qb2 Qg4 20.f3 Qg2 21.Nf2 Bf6–+) 19...f5 20.Qb2 (20.Nf2 0–0–0 21.Rhb1 Qd2 22.Kf1 Bf6–+) 20...fe4 21.Rad1 Qe6 22.Qg7 (22.Rd2 ef3 23.gf3 Rf8–+) 22...Rg8 23.Qh7 Rg2 24.Kf1 (24.Ke1 Qe5 25.Qh3 ef3 26.Qf3–+) 24...Qc4 25.Kg2 Qe2 26.Kg1 Qd1 27.Kg2 0–1. Kessler,Meinrad – Perlitz,Heiko, TT–10 ETC, 2003.

6.b5 dc4 7.Bc4 Nbd7 8.Qc2=.

6.b5 c6 7.Qc2 Be7 8.Nc3 Be6 9.cd5 cd5 10.Nge2 0–0 11.Nf4 Nbd7 12.Be2 Rc8 13.Rc1 Nb6 14.0–0 Bg4 15.f3 ef3 16.Bf3 Bf3 17.Rf3 (17.gf3? d4 18.Qd3 dc3 19.Rc3 Rc3 20.Bc3 Qd3 21.Nd3 Nc4–+) 17...d4 18.ed4 Qd4 19.Kh1 Qc5 20.Qd1 Qg5 21.Qe2 Rfe8 22.Qf2 Nc4 23.d4 Na3 (worse is 23...Ba3 24.Ba3 Na3 25.Rf1–/+) 24.Rg3 Qf5 25.Re1 Nc4 (25...Nb5?! 26.Re5 Ng4 27.Rg4 (27.Rf5? Nf2 28.Kg1 Nd4 29.Ra5 Nh1 30.Kh1 Ba3–+) 27...Qg4 28.Rb5+=) 26.Bc1 Bb4 27.Rf1 Bc3 28.Rc3 Ne4 29.Qc2 Ncd6 (better is 29...Qb5!? 30.Rcf3 Ncd2 31.Qd1 Nf3 32.Rf3–+) 30.Rc8 Rc8 31.Qe2 Rc1! 32.Rc1 Qf4 33.Rf1 Qg5 34.b6 Qh4 35.Kg1 Qd8 36.Qg4 (36.Rc1 Nf6–+ (36...Qb6?! 37.Qe4 Qd8 38.Qd5+=)) 36...Qb6 37.Rd1 Qb2 38.Qh4 g5 39.Qe1 a4 0–1. combijack (1800) – ciano999, gameknot.com, 2011.

6.b5 Nbd7 7.d3= ed3 8.Bd3 Nc5 9.Be2 Bf5 (9...Be6 10.Nd2=) 10.Bd4 (10.cd5 Qd5 11.Bf6 Qg2=) 10...dc4 11.Bc4 Bd6 12.Nf3 (12.Nc3 Ne6=) 12...0–0 13.Nbd2 (13.0–0 Qe7=) 13...Qe7 (13...Nd3 14.Bd3 Bd3 15.Qb3=) 14.0–0 Nfd7 (14...Rfe8 15.Qc1=) 15.Re1+= c6 (15...Ne4 16.Bd5 Ndc5 17.Qb1=) 16.e4 Bg6 (16...Ne4? 17.Bd3 Nf2 18.Kf2+– (18.Re7?! Nd1 19.Bf5 Be7 20.Bd7 c5+/–; 18.Bf5?! Nd1 19.Re7 Be7 20.Bd7 c5+/–)) 17.bc6 (17.e5 Bc7=) 17...bc6 18.e5 (18.Qc1 Rfe8= (worse is 18...Be4 19.Ne4 Ne4 20.Bd3+/–)) 18...Bc7= 19.Bc5 (19.Nb3 Rfd8=) 19...Nc5 20.Nd4 Qd7 (20...Be5? 21.Nc6 Bh2 22.Kh2 Qc7 23.Ne5+–) 21.N2f3 Kh8 (21...Rae8 22.Rc1 Bb6 23.e6 Ne6 24.Be6 fe6 25.Nc6 Qd1 26.Rcd1+=) 22.Qe2 (22.Rc1 Bb6+=) 22...Be4= 23.Nb3 Nb3 24.Bb3 Bf3 (24...Bg6 25.Rad1 Qe7 26.Ba4+=) 25.Qf3 (worse is 25.gf3 f6 26.f4 Qd4+=) 25...Rae8 26.Rad1 Qe7 27.Ba4 Be5 (27...Rd8 28.Rb1+=) 28.Bc6 ½–½. Bonetti,Shane – Perlitz,Heinz, PCM–2004–G1.15, 2004.

6.b5 Be6 7.Qc2 (7.cd5 Nd5 (< 7...Qd5 8.Bf6 gf6 9.Nc3+/–) 8.d3 ed3=) 7...Be7 (7...Nbd7 8.Nc3 dc4 9.Ne4 Ne4 10.Qe4=+) 8.cd5= Bd5 9.Nc3 c6 10.Nd5 (10.d3 ed3 11.Qd3 0–0=) 10...Qd5 (10...cd5 11.d3 Nbd7 12.Rc1=) 11.Bc4 (11.d3 ed3 12.Qd3 Qd3 13.Bd3 Nbd7+=) 11...Qg5= 12.Bf6 (12.Bf1 0–0=) 12...Qg2 13.bc6 bc6?? (13...Qh1 14.cb7 Qg1 15.Bf1 Bf6 16.ba8Q 0–0 17.Qae4 Qh2+–) 14.Bd5 (14.Bg7 Qh1 15.Bh8 Qg1 16.Bf1=) 14...Qh1 15.Bc6 Nd7 16.Kf1 Rc8 17.Bd7? Kd7–+ 18.Qa4 Ke6 19.Bg7 Rhg8 20.Qb3 Kd6 21.Qb6 Rc6?? 22.Qd4= Kc7 23.Qa7 ½–½. Van Esbroeck – Boucq, corr Belgium T2/065, 1995.

6.c5 ab4 7.ab4 Ra1 8.Ba1 Be7 9.f3 0–0 10.d4 Nc6 11.Bc3 Bf5 12.Nd2 Re8 13.b5 Na7 14.Qa4 Nc8 15.Be2 b6 16.c6 Nd6 17.f4 Ng4 18.Bg4 Bg4 19.Ne2 Qa8 20.Qb3 Be6 21.0–0 Bf6 22.Ra1 Qc8 23.Bb4 Qd8 24.Bd6 Qd6 25.Ra7 Bg4 26.Kf2 Bh4 27.g3 Be7 28.Nc3 Be6 29.f5 Bf5 30.Qd5 Be6? 31.Qd6+– Bd6 32.d5 Bf5 33.Nc4 (33…Bb4 34.Na2+– (34.Rc7?! Bc3 35.Ra7 Bb4+/–)) 1–0. busakid – camilojr_poa, playchess.de, 2003.

5.c4 dc4

6.Bc4 Nc6 7.Qc2 Bf5 +=.

6.Bc4 Nc6 7.Nc3 Bd6 8.Qc2 Ne5 9.Ne4 Ne4 10.Qe4 0–0?? (better is 10...f5 11.Qc2 Nc4 12.Qc4 Qe7+=) 11.Be5+– Be5 12.Qe5 Kh8 13.Nf3 Bg4 14.Be2 Bf3 15.Bf3 c6 16.Rd1 Qd3 17.Qc3 Rad8 18.Be2 Qc3 19.dc3 Rd1 20.Bd1 f5 21.Bc2 g6 22.Ke2 Kg7 23.Rd1 Rf7 24.Bb3 Re7 25.g3 g5 26.Rd8 h5 27.Rg8 Kf6 28.Rh8 h4 29.gh4 gh4 30.Rh4 Kg5 31.Rh8 f4 32.h4 Kg4 33.f3 Kg3 34.e4 Rg7 35.h5 Kh4 36.Rg8 (better is 36.h6!? Rg6+–) 36...Rg8 37.Bg8 Kh5 38.e5 Kg5 39.e6 Kf6 40.Bf7 b6 41.Kd3 a6 42.c4 Ke7 43.Ke4 (43.Ke4 Kd6 44.Kf4+–) 1–0. combijack (1745) – pawnpusher2011, gameknot.com, 2010.

6.Bc4 Nc6 7.Ne2 Bg4 8.Qb3 Qe7= 9.Nf4 Ne5 10.Be5+/– Qe5 11.Bf7 Ke7 12.Nc3 g5 13.Nfe2 Rd8 14.Ng3 Bg7 15.Rc1 Rd6 16.h3 Bc8 17.Nce4! Ne4 18.Rc7 Rd7 19.Rd7+= Bd7 20.0–0?? Nd2–+ (20...Nd2 21.Qd1 Nf1 (21...Kf7?! 22.Qd2 Rd8 23.Nh5–/+) 22.Nf1 Rd8–+ (22...Kf7?! 23.Qd7 Qe7 24.Qf5 Bf6 25.Ng3–+); 20...Ng3?! 21.fg3 Qg3 22.Qd5–/+) 0–1. rommeltdf (1800) – tmurphy (1920), net–chess.com, 2002.

6.Bc4 Bd6 7.Nc3 0–0 8.Qc2 Qe7 9.Nge2 Nc6 10.Nd5 Nd5 11.Bd5 Re8 12.Ng3 Bg3 13.hg3 (worse is 13.Bc6 Bf2 14.Kf2 bc6 15.Qc6 Qh4 16.Kg1 Be6=) 13...Bf5 14.Qc3 Qf8 15.Rh5 Bg6 16.Rg5 Rad8 17.b5 Ne7 18.Be4 f5 19.Bb7 h6 20.Rg6 Ng6 21.Qc7 Re7 22.Qc4 Kh7 23.Bc6 Rc7 24.Bc3 Rdc8 25.a4 Ne7 26.Be5 Nc6? (better is 26...Rd7+/–) 27.Bc7+– (27.bc6?! Rc6 28.Qf4 Kg8=) 27...Qf6 28.Rc1 (28.Qc6?! Qa1 29.Ke2 Qa4=) 28...Ne5 29.Qc3 Qe6 30.Be5 (better is 30.Qd4+–) 30...Rc3 31.Bc3 Qe4? (31...Qc4 32.Bb2 Qa4 33.Rc7+–) 32.f3 (better is 32.Bd4 Qe7 33.Rc6+–) 32...Qa4 33.Ra1 Qb5 34.Ra7 h5 35.Rg7 Kh6 36.Kf2 Qd3 37.Rg8 Qd5 38.Rb8 Qd6 39.Rb4 Kg5 40.Rd4 Qa6 41.Bb4 Qb5 42.Bd6 Qb1 43.Be5 Kg6 44.Rd6 Kh7 45.Bf4 Kg7 46.d4 Qd1 47.Rh6 Qh1 48.d5 h4 (48...Qb1 49.d6+–) 49.Rh4 Qd1 50.d6 Kg6 51.Rh6 (better is 51.g4+–) 51...Kf7 (51...Kg7+–) 52.d7! Ke7 1–0. Baranov,Andrey (2115) – Dashko,Andrey (2275), RUS–ch sf Krasnodar, 1999.

6.Bc4 Bd6 7.d3 0–0=.

6.Bc4 Bd6 7.d3 ed3 8.Bd3 0–0 9.Qc2 h6 (9...Nbd7 10.Nf3=) 10.Nf3+= Be6 11.Nbd2 Nbd7 12.0–0 c6 13.h3 (13.Nc4 Bc7+=) 13...Qc7 14.Nd4 Bd5 (14...Rad8 15.Ne6 fe6 16.Bc4=) 15.e4 Be6 16.Ne6 fe6 17.Nf3 Ne5 18.Ne5 Be5 19.Bc4 (19.Be5 Qe5 20.f4 Qd4 21.Kh2 Nh5=) 19...Rfe8 20.f3 Nh5 21.Be5 Qe5 22.Qb3 (22.Rad1 Rad8=) 22...Qd4 (22...b5 23.Bd3+=) 23.Kh2= Qe5 24.Kg1 Ng3 (24...b5 25.Bd3+=) 25.Rfd1 b5 26.Bf1 Kh8 (26...Nf1!? 27.Rf1 c5=) 27.Rac1+= Rac8 28.Rc5 Qf4 29.Rd7 Qc1?? (better is 29...Rcd8 30.Rd8 Rd8 31.Rc6 A) worse is 31...Nf1 32.Kf1 Kh7 33.Rc3+/– (33.Re6? Qc1 34.Kf2 Qd2 35.Kg1 Qe2–+); B) 31...a6+=) 30.Rc1+– Re7 31.Re7 Rc7 32.Rc7 g5 (32...Kh7 33.Qe6 Nf5 34.Qf5 Kg8 35.Rc8) 33.Qb2 Kg8 (33...e5 34.Qe5 Kg8 35.Qe8) 34.Qg7 1–0. GuestHFRL – GuestTYSM, freechess.org, 2017.

6.Bc4 Bd6 7.Ne2 0–0 (7...a5 8.b5+=) 8.Nbc3 (8.d3 Nc6=) 8...c6 9.Ng3 (9.Qc2 b5 10.Ba2 Re8=) 9...Re8+= 10.0–0 Qc7 (10...b5 11.Ba2+=) 11.f4 (11.d3 Be6=) 11...ef3+= 12.Qf3 Bg4 13.Qf2 Be6 (13...Bg3 14.hg3 Be6 15.Be2+=) 14.Be2 (14.Be6 Re6 (worse is 14...fe6 15.Nce4 Rf8 16.Bf6+/–) 15.Nce2 a5=) 14...h5 (14...Nbd7 15.e4+=) 15.Rfc1 (15.Nh5 Bh2 16.Kh1 Nh5 17.Bh5 Re7=) 15...Bg3+= 16.hg3 Nbd7 (16...Qd6 17.Nb1 Nbd7 18.Qf4+=) 17.Qf4 Qf4 (17...Qd8 18.Rf1+=) 18.gf4= (worse is 18.ef4 Rad8–/+) 18...Nb6 (18...Rad8 19.d3=) 19.d3 (19.b5 Bg4=) 19...Rad8 (19...Bg4 20.e4=) 20.e4 (20.b5 cb5 21.Nb5 Bg4 22.Bf6 gf6=) 20...Bg4 21.Bf1 (21.Kf2 Kf8=) 21...h4 22.a4 (22.Kf2 Nh5 23.Ke3 f5–/+) 22...Nh5+= 23.a5 Nc8 24.a6 b6 (24...b5 25.f5–/+) 25.b5+= c5 (25...cb5 26.Kf2+=) 26.Nd5 Be6 (26...Ne7 27.Ne7 Re7 28.f5–/+) 27.Nc7= Re7 (worse is 27...Nf4 28.Ne8 Re8 29.d4 cd4 30.Bd4+/–) 28.Ne6 Re6 (28...fe6 29.Be5=) 29.f5 Re7 (29...Ree8 30.Ra3=) 30.Ra3 (30.Bc3 Ng3=) 30...f6 (30...Nd6 31.Rb3+=) 31.Kf2 (31.d4!?=) 31...Ng3 32.Rb3 Red7 Exerts pressure on the backward pawn (32...Nd6 33.Ba3+=) 33.Ke3 Nd6 (33...Nf1?! 34.Rf1 Nd6 35.Kf4=) 34.Kf4 Nf7 (34...Re8 35.Kf3–/+) 35.Kg4 (35.Ke3 Nh6 (35...Nf1?! 36.Rf1 Nd6 37.Kf4=) 36.Kf4 Nf1 37.Rf1 Rd3 38.Rd3 Rd3–/+) 35...Nf1–/+ 36.Rf1 Rd3 37.Rf3 (37.Rd3 Rd3 38.Kh4 Rb3–+) 37...Rb3 (37...c4 38.Rb4 Ng5 39.Rc4 Nf3 40.gf3–+) 38.Rb3–+ Rd2 39.Ba3 (39.Kh4 Rg2 40.Bc1 Re2–+) 39...Ne5 (39...Rg2!? 40.Kh4 Re2 41.Rd3–+) 40.Kh4 Rd3 (better is 40...Rg2 41.Kh3 Re2–+) 41.Rd3+= Nd3 42.Kg3 Kf7 43.Kf3 Ne5 44.Ke3?? (better is 44.Ke2–/+) 44...Nc4–+ (44...Nc4 45.Kd3 Na3–+) 0–1. Berlacki,Piotr – Baumgartner,Walter, Wch Seniors Bad Woerishofen, 1991.

6.Bc4 Nbd7 7.d4 Nb6 8.Bb3 Bg4 9.Ne2 c6 10.Nbc3 h6 11.h3 Bh5 12.0–0 Bd6 13.Qc2 Qe7 14.b5 Nbd5 15.bc6 bc6?? (15...Nc3 16.Nc3 Rc8 17.cb7 Qb7 18.Ba4 Kd8+/–) 16.Nd5+– cd5 17.Qc6 Qd7 18.Qa8 Qd8 19.Qd8 (19.Ba4 Nd7 20.Bd7 Kd7 21.Qa7 Qc7 22.Qa4 Qc6 23.Qc6 Kc6 24.Rfc1 Kd7+–) 19...Kd8 20.Nc3 Kd7 21.Nd5 Rb8 22.Nf6 gf6 23.Ba4 Ke7 24.Rab1 Be2 25.Rfc1 Bd3 26.Bc2 f5 27.Bd3 ed3 28.Rc3 f4 29.Rd3 Ke6 (29...fe3 30.Re3 Kd7 31.g4+–) 30.e4 f5 (30...a6 31.e5 Be7 32.d5 Kd7 33.Kf1+–) 31.e5 Be7 32.d5 Kf7 33.e6 Kg6 34.d6 Bf6 35.d7 Bb2 (35...f3 36.Rd2+–) 36.Rb2! Rb2 37.d8Q Re2 38.e7 Re1 39.Kh2 Kf7 40.Qf8 Kg6 41.Rd6 Kh7 (41...Re6 42.Re6 Kg5 43.Qh6) 42.Rh6 1–0. Loulou – debu1, playchess.de, 2003.

6.Bc4 Nbd7 7.Ne2 Bd6 8.Nbc3 Ne5 9.Qb3 0–0 10.0–0 Nd3 11.Bd3 ed3 12.Nc1 Be5 13.Na4+= Ne4? 14.Be5+– Nd2 15.Qd3 Nf1 16.Qd8 Rd8 17.Kf1 Rd1 18.Ke2 Rd7 19.Nd3 f6 20.Bg3 b6 21.Rc1 Ba6 22.Nab2 h6 23.Rc7 Rc7 24.Bc7 Bb5 25.Kd2 Rc8 26.Bg3 Rd8 27.e4 Bc6 28.Ke3 Re8 29.f3 f5 30.Nf2 fe4 31.fe4 g5 32.Nc4 Rd8 33.Ng4 Kg7 34.Be5 Kg6 35.Nd6 h5 36.Nf2 Rd7 37.Nd3 h4 38.b5 Ba8 39.Nb4 Re7 40.Nc6 Bc6 41.bc6 Rc7 42.Kd4 Rc6 43.g3 a5 44.Nc4 hg3 45.Bg3 Re6 46.Ne5 Kh5 47.Kd5 Re8 48.Nd7 b5 49.e5 b4 50.ab4 ab4 51.e6 b3 52.Be5 g4 53.Kd6 Kg6 54.Nc5 Rh8?? 55.Bh8 Kh5 56.e7 Kh4 (56...g3 57.e8Q Kh4 58.Bf6 Kg4 59.Qg6 Kf3 60.Qe4 Kf2 61.Bd4 Kf1 62.Qf3 Ke1 63.Bc3) 1–0. mgriffin (1655) – tapza, net–chess.com, 2001.

6.Bc4 Be7 0–0+= 8.Ne2 Bf5 (better is 8...Nbd7!?+=) 9.Nbc3+= Bg6 10.Nf4 Nbd7 (10...Bf5 11.h3 h6 12.0–0+=) 11.Ng6+/– hg6 12.Qc2 Ne5 13.Ne4 Nc4 14.Qc4 Ne4 15.Qe4 c6 16.0–0 Qd2 (16...Re8 17.Qc4+/–) 17.Bg7 Kg7 (17...Rfe8 18.Rfd1 Qe2 19.Bd4+/–) 18.Qe7+– Rab8 19.Qe5 Kh7 (19...Kg8 20.Rfd1 Qe2+–) 20.Rfd1 Qb2?? (20...Qc2 21.Rd4 Kg8+–) 21.Qb2. b4_player – anony, internet, 2014.

6.Bc4 Be7 7.d3 ed3 8.Qd3 Qd3 9.Bd3 Be6 10.Nf3 Nbd7 11.Nbd2 c6 12.0–0 0–0 13.Rfd1 Rfd8 14.Bc4 Bc4 15.Nc4 Ne4 16.h3 Bf6 17.Bf6 Ndf6 18.Rac1 Kf8 19.Nfd2 Ng5 (19...Nd2 20.Rd2 Rd2 21.Nd2+=) 20.f3 Rd7 21.Nb3 Rad8 22.Rd7 Rd7 (worse is 22...Nd7 23.Nba5 b5 24.Nc6+–) 23.Rc3 (23.Nc5 Re7+=) 23...Nd5 (23...Rd1!? 24.Kh2 Nd5=) 24.Rd3+= Ke7 25.e4 Nf4 26.Rd7 Kd7 27.Nd4 f6 28.Nf5 g6 29.Ng3 Nd3 30.Ne2 Ne1 31.Nd4 Ne6 32.Ne6 Ke6 33.a4 Nc2 34.b5 c5 35.Kf2 b6 36.Ke2 h5 37.Kd3 (37.g3 f5=) 37...Nd4 (better is 37...Ne1!? 38.Kc3 Ng2–/+) 38.Ke3 g5 39.g4 hg4 40.hg4 Nc2 41.Kd3 Nd4 42.Ke3 Kd7 43.Kf2 Ne6 44.Ke3 Nf4 45.Kf2 Ke6 46.Ke3 Ng6 47.Kd3? (better is 47.Ke2=) 47...Ne5–+ 48.Ne5 Ke5 (48...fe5?! 49.Kc2=) 49.Ke3 Ke6 (better is 49...c4–+) 50.Kd3 Ke5 51.Ke3 Kd6 (better is 51...c4 52.Ke2 Kf4–+) 52.Kd3= Ke5 ½–½. Fournier,Frederic (1690) – LIMIPROP (1635), Active, 2007.

6.Bc4 Be7 7.Ne2!? Nbd7 8.Qc2=.

6.Bc4 Bf5 7.Ne2 Bd6 8.Nbc3 Be5 9.Qb3 0–0=+ 10.Ng3 Bg6 11.0–0–0 Nbd7 12.d4 ed3 13.Bd3? Bd3–/+ 14.Rd3 Nc5! 15.Rd8 Nb3 16.Kc2 Rad8 17.Kb3 Ng4 18.f3 Ne3 19.Re1 Bc3 20.Bc3 Rd3 21.Re2 Nd1 22.Ne4 f5 (22...f5 23.Kc2 fe4–+; 22...Nc3?! 23.Nc3 Rfd8 24.Re7–+) 0–1. mgriffin (1640) – bagpuss (1775), net–chess.com, 2001.

6.Bc4 Bg4 7.Qb3 Qd7 8.Bf6 gf6 9.Nc3 f5 10.Nge2 (10.f3 ef3 11.Nf3 Bf3 12.gf3 c6+=) 10...Bg7 (10...Be2 11.Be2 Rg8 12.g3+=) 11.Nf4 Nc6? (better is 11...Be5+=) 12.h3+– h5 (12...0–0–0 13.Ra2 Ne5 14.hg4 Nc4 15.Qc4 Bc3 16.Qc3 fg4 17.Rc2+–) 13.hg4 hg4 (13...0–0–0 14.0–0–0 hg4 15.Bf7+–) 14.Rh8 Bh8 15.0–0–0 Ne5 16.Rh1 (16.d4 Nc4 17.Qc4 0–0–0+–) 16...Bg7 (16...0–0–0 17.Rd1+–) 17.Rh7 f6?? (17...Nc4 18.Qc4 Bc3 19.Qc3 0–0–0+–) 18.Be6 Qe7 19.Nfd5 Qd6 (19...Qf8 20.Nc7 Ke7 21.Na8 f4 22.Ne4 f5 23.Bf5 Qf5 24.Rg7 Qf7 25.Rf7 Nf7+–) 20.Rg7 a5 21.Nf6 (21.Rg8 Qf8 22.Bf7 Kd8 23.Rf8 Kd7 24.Ra8 Nc4 25.Qc4 c6 26.Nf6 Kd6 27.Qc5 Kc7 28.Ncd5) 21...Kf8 22.Rg8 Ke7 23.Ncd5 Ke6 24.Nc7 (24.Nf4 Kf6 25.Nh5 Ke7 26.Rg7 Nf7 27.Qf7 Kd8 28.Rg8 Qf8 29.Rf8) 24...Kf6+– 25.Nd5 Kf7 (25...Ke6 26.Nf4 Kd7 27.Ra8 ab4+–) 26.Nf4 Ke7 27.Ra8 (27.Rg7 Ke8 28.Qg8 Qf8 29.Qe6 Kd8 30.Qd5 Ke8 31.Qe5 Kd8 32.Ne6 Ke8 33.Qb5) 27...Qc6 28.Kd1 b6 (28...Qc4 29.Qc4 Nc4 30.ba5+–) 29.Ra7 (29.Qg8!? Qa8 30.Qa8 ab4 31.Qb7 Nd7+–) 29...Kd6 (29...Nd7+–) 30.Qe6 1–0. GuestNKJR – miehdra, freechess.org, 2017.

6.Bc4 Bg4 7.Bf6 Qf6 8.Qg4 Qa1 9.Qc8 Ke7= 10.Qc7?? Ke8?? 11.Bf7. thedesertfox (2055) – islanderfan (1625), net–chess.com, 2004.

5.c4 c6

6.Qb3 Be7 7.Ne2 0–0 8.Nf4 Na6 (8...dc4 9.Qc4 Bd6 10.Be2+=) 9.d4 Nc7 10.Nd2 Bd6 11.Ne2 Be6 (11...dc4 12.Nc4 Be6 13.Qc2–/+) 12.c5= Be7 13.Nc3 White intends b5 13...Nd7 14.Be2 f5 15.g3 Qe8 16.a4 White prepares the advance b5 16...Qf7 17.b5 Rab8 18.Qd1 g5 19.Nb3 Nf6 20.Ba3 Kh8 21.Na5 Bd7 22.Ra2 Ne6 23.Rb2 f4 24.Qb1 Bd8 25.b6 a6 26.h3 Ng7 27.g4 f3 28.Bf1 h5 29.Kd2 Kg8 30.Na2 hg4 31.hg4 Ng4 32.Kc3 Nf6 33.Nb4 g4 34.Rd2 (34.Kd2 g3! 35.fg3 Qg6 36.Ba6 ba6 37.Nbc6 Bc6 38.Nc6 Rc8 39.Nd8 Rfd8= (worse is 39...Rcd8 40.c6+/–)) 34...Nf5 35.Qe1 Qg7 36.Bc1 Kf7 37.Ba6 (better is 37.Kc2–+) 37...ba6 38.Nac6 Bc6 39.Nc6 Bb6! 40.cb6 (40.Ne5 Ke6 41.cb6 Rfc8 42.Kb2 Rb6 43.Ka1–+) 40...Rfc8 (40...Rb6?! 41.Ne5 Ke6 42.Rc2–+) 41.a5 Rc6 42.Kb3 Ke6 43.Ba3 (43.Rc2 Qb7 44.Rc6 Qc6–+) 43...Rc4 44.Qg1 (44.Rc2 g3 45.Rc4 dc4 46.Kb2 gf2 47.Qf2–+) 44...Qd7 45.Qh2 (45.Qd1 Qb5 46.Ka2 Qa5–+) 45...Qb5 (better is 45...Qa4!? 46.Ka2 g3 47.fg3–+) 46.Ka2 g3 (46...g3 47.fg3 Qa5–+) 0–1. Villareal,Julio (1940) – Fabian,Gaston (2355), Montevideo URU, 2nd Latinoamerican Cup, 2011.

6.b5 Be6 7.Qc2 (7.cd5 cd5 8.d3 Nbd7 9.Ne2 Bg4 10.de4 de4+=) 7...Nbd7 (7...Be7 8.bc6 Nc6 9.cd5 Bd5 10.Nc3 0–0+=; 7...dc4 8.Bc4 Bc4 9.Qc4 cb5 10.Qb5 Qd7=) 8.d3 (8.Nc3 Rc8 9.bc6 bc6 10.Rb1 Nc5+=) 8...cb5 9.cb5 Bd6 (9...Rc8 10.Nc3 Bd6–/+) 10.de4 (10.Nd2 Rc8+=) 10...de4 (worse is 10...Ne4 11.Bg7 Rc8 12.Qb2+=) 11.Nc3 Nc5 12.Be2 0–0 13.f3 Re8 14.Nd1 Rc8 15.Bc3 ef3 16.Nf3 Nfe4 17.a4 (17.Bd4 Bd5 18.Bc5 Qa5 19.Kf1 Rc5–+) 17...Bf5 (17...Bb3 18.Qb2 Bd1 19.Bg7 Na4 20.Ra4 Ba4 21.Bh8–+) 18.Qb2 (18.0–0 Ng3 (18...Nc3?! 19.Qc3 Qc7 20.h3–/+) 19.Qb2 Ne2 20.Qe2 Bd3–+) 18...Nc3 19.Nc3 Re3 20.Qd2 (20.0–0 Qf6 21.Rad1 Ne4 (21...Qc3?! 22.Qc3 Rc3 23.Rd6–/+; 21...Rc3?! 22.Rd6 Qd6 23.Qc3–+) 22.Ne4 A) 22...Qb2?! 23.Nd6 Re2 24.Nc8–+; B) 22...Re4? 23.Qf6 gf6 24.Rd6 Re2 25.Nd4+– (25.Rf6 Be4+=); C) 22...Be4?! 23.Qf6 gf6 24.Rd6 Re2 25.Rfd1–/+ (25.Rf6? Rcc2 26.Kh1 Rg2–+); D) 22...Bh2 23.Kh2 Qb2–+) 20...Nb3 (better is 20...Nd3 21.Kf1 Bf4–+) 21.Qe3 Na1 22.Bd1?? (22.Kf1–+) 22...Bb4 (22...Bb4 23.Qf4 Nc2 (23...Rc3?! 24.Qb4 Rd3 25.Ke2–+) 24.Bc2 Bc3 25.Kf2 Bc2–+) 0–1. Streit,x – Melzer,x, corr DDR, 1982.

6.Qc2 a5 7.cd5 (7.ba5 Nbd7 8.cd5 cd5 9.Bc3 Bd6 10.d3=; 7.b5 Be6 8.d3 dc4 9.dc4 cb5 10.Nd2+=) 7...ab4 8.ab4 Ra1 9.Ba1 cd5 10.Bf6 =.

6.Qc2 a6 7.d3 (7.cd5 cd5 (worse is 7...Qd5 8.Bf6 gf6 9.Nc3+/–) 8.Bf6 gf6=) 7...Bf5 8.Nd2 Nbd7 9.c5 (9.Rd1 Bd6=) 9...Qe7 (9...Be7 10.de4 de4 11.Rd1=) 10.h3 (10.de4 Ne4 11.Bd3 a5=) 10...h5 (10...Ne5 11.Be5 Qe5 12.d4=) 11.de4 de4 (11...Ne4!? 12.Bd3 0–0–0=) 12.Ne2 Rh6 (12...Ne5 13.Ng3 Qe6 14.Nde4 Ne4 15.Ne4+=) 13.Nc4+/– Qd8 (13...Nd5 14.Nd6 Rd6 15.cd6 Qd6 16.Rd1+/–) 14.0–0–0 (14.Ng3 Bg6+/–) 14...Qc7+= 15.Ng3 (15.Nd6 Bd6 16.cd6 Qd8+=) 15...Bh7 (15...Bg6 16.Nd6 Bd6 17.cd6+=) 16.Rd4 The pressure on e4 grows (16.Nd6 Bd6 17.cd6 Qd8+=) 16...0–0–0 (16...a5 17.Nd6 (worse is 17.Na5 Nc5 18.Kd1 Nd3 19.Bd3 ed3+=) 17...Bd6 18.cd6=) 17.Nd2+/– e4 draws heavy fire 17...Re8 (17...Be7 18.Bc4+/–) 18.Bc4 (18.Nge4 Ne4 19.Ne4 Re4 20.Re4 Nf6+/–) 18...h4 (18...Ne5 19.Nge4 (worse is 19.Nde4 h4 20.Nf6 Bc2 21.Ne8 Qb8=) 19...Nc4 20.Qc4+/– (20.Rc4?! Ne4 21.Ne4 Rhe6 22.Nd6 Qd6 23.cd6 Bc2 24.Kc2 Rd6+=)) 19.Nge4 Ne4 (19...Nc5 20.bc5 Bc5 21.Nf6 (21.Nc5?! Bc2 22.Kc2 b5=) 21...Bc2 22.Ne8+=) 20.Ne4 f5? (better is 20...Nc5!? 21.bc5 Bc5+/–) 21.Ng5+– Bg6 22.Be6 Re7 (22...f4 23.Qc3 (23.Bd7?! Qd7 24.Rd7 Bc2+–; 23.Rd7?! Bc2 24.Rc7 Kc7 25.Be5 Kd8 26.Kc2 Ree6+–) 23...Re7 24.Bd7 Rd7 25.Ne6+– (25.ef4?! Bf5+–; worse is 25.Rf4 Rd8+–)) 23.Rhd1 (23.Bd7 Rd7 24.Ne6 f4+–) 23...Be8 24.Rd6 Kb8 (24...f4 25.Be5 Qd8 26.Qe4 Ree6 27.Ne6 Bd6 28.Nd8 (28.Bd6?! Qf6 29.Nf4 Qc3 30.Qc2 Qa3 31.Qb2 Qa4+–) 28...Be5 29.ef4 Bf4 30.Qf4+–) 25.Qf5 Nf6 (25...Bg6 26.Qf4 Ka7 27.Bd7 Qb8+–) 26.Rd8 Ka7 27.Be5 Bg6 28.Bc7 Rc7 29.Qf4 (29.Qf4 Bd6 30.cd6+–) 1–0. Vukovic,Ljubomir (1960) – Danojlic,Petar, Ada Open Belgrade SCG, 2005.

6.Qc2 dc4 7.Bc4 a5 8.b5 Bf5 9.Ne2 Bd6 10.Ng3 =.

6.Qc2 Qc7 7.cd5+/- Nd5 8.Qe4 Be6 9.Nf3 Nd7 10.Ng5 Qd6 11.Ne6 Qe6 12.Qe6 fe6 13.Be2 0–0–0 14.Bd3 Re8 15.0–0 Rg8 (15...N7f6 16.f4+/-) 16.Nc3 (16.Bh7 Rh8 17.Bg6 Rd8+–) 16...Ne5 (16...g6 17.Ne4+/-) 17.Be2 (17.Bh7 Rh8 18.Nd5 ed5 19.Bf5 Kd8+–) 17...Bd6 18.f4 Ng6 19.Bh5 Ref8 20.Bg6 hg6 21.Rf3 Nc3 22.Bc3 Re8 (22...Rf5 23.h4+–) 23.Rg3 Kd7 24.Rg6 e5 25.g3 ef4 26.gf4 Re7 27.Rf1 b6 (27...c5 28.bc5 Bc5 29.f5+–) 28.Rf2 (28.f5!? Rge8+–) 28...c5 29.bc5 Bc5 30.Bb2 Re6 31.f5 Rg6 32.fg6 Ke6 (32...b5 33.Rf7 Ke6 34.Rc7+–) 33.a4 (33.d4!? Bd6 34.e4 Re8+–) 33...Bb4 34.Kf1 Kd5 (34...a6 35.e4 b5 36.ab5 ab5 37.d4+–) 35.d3 Re8 (35...Ke6+–) 36.e4 Kc6 37.Bg7 Rg8 (37...Be7 38.d4+–) 38.Rf7 Bd6 (38...a6 39.h4+–) 39.h4 Bg3 40.h5 (40.h5 Bd6 41.h6+–) 1–0. Kasper,Peter – Lischeid,Kilian, Berlin Lichtenberger op 8th, 2009.

6.Qc2 Bd6 7.Nc3 Be6 (7...0–0 8.Nge2+=) 8.d3 (8.c5 Be5 9.f4+=) 8...Be5?? (8...ed3 9.Qd3 dc4 10.Qd4–/+) 9.c5 (better is 9.de4 Bc3 10.Bc3 de4 11.Rd1+/–) 9...0–0+= 10.de4 de4 11.Rd1 Qe7 12.Nge2 Bg4 (12...a5!? 13.Ng3 Bg4=) 13.h3= Bh5 14.Rd2 Bg6 15.Nd4 Rd8 16.Nce2 (16.Bc4 a5=) 16...Nbd7+= 17.g3 Nd5 18.Bg2 f5 (18...a5 19.Qb3+=) 19.Qb3 (19.Nf4 Bf4 20.ef4 a5=) 19...Kh8 (19...Qf6 20.Nf4 Bf7 21.Qc2+=) 20.0–0= Qf6 (20...Bd4 21.Nd4 a5 22.Rfd1=) 21.Nf4 Bf7 22.Qc2 g5? (better is 22...a5!?=) 23.Nd5+/– cd5 (23...Bd5 24.f3 ef3 25.Bf3 Bf3 26.Rf3+– (26.Nf3?! Bb2 27.Qb2 Qb2 28.Rb2 g4+=)) 24.Nb5 (better is 24.f4!? ef3 25.Nf3 Bb2 26.Qb2 Qb2 27.Rb2+–) 24...Bb2 25.Qb2 Qb2 26.Rb2 Ne5 27.Nd6 b6 28.Nf5 (28.f4 ef3 29.Nf7 Nf7 30.Rf3 Nh6+/–) 28...bc5 29.bc5 Nc4? (better is 29...Rdc8+=) 30.Rb7+– Be6 31.Nd4 Bc8 32.Re7 a5 (32...Rg8 33.Nb5 Rg7 34.Re8 Rg8 35.Rg8 Kg8 36.Nc7+–) 33.a4 Nb2 (33...Rg8 34.Nb5 Rg7 35.Re8 Rg8 36.Rg8 Kg8 37.Nc7+–) 34.Ra1 Rf8 (34...g4 35.h4+–) 35.Bf1 (35.Re5 Rd8 36.Rg5 h6+–) 35...Rb8? (35...Nd3 36.Bd3 ed3 37.Kg2+–) 36.Nb5 (better is 36.Rb1!? Rf6+–) 36...Rf6 (36...Rb7 37.Re5+–) 37.Ra3 (better is 37.Nd6 Rf8 38.c6+–) 37...Rh6?? (better is 37...Ba6 38.Ra2 Nd3 39.Bd3 ed3+–) 38.Re8 Kg7 39.Nd6 Nd1 (39...Re6 40.Rd8 Nd3 41.Nc8 Nc5 42.Bb5+–) 40.Rc8 (better is 40.Bb5!? Rf6 41.Nc8 Rf2+–) 40...Rb2 (40...Rc8 41.Nc8 Rc6+–) 41.Nf5 (41.Nf5 Kg6 42.Rf8+–) 1–0. Vallejos,JA (1890) – De Oliveira,F Barra (1735), Mogi das Cruzes BRA, Catropa Mem, 2014.

6.Qc2 Be7 7.Nc3 a5 8.b5 0–0 9.d3 Bf5 10.cd5=.

6.Qc2 Be7 7.d3 Bf5 8.Nd2 0–0 9.Rd1 Nbd7 10.de4=.

6.Qc2 Be7 7.cd5 cd5 8.d3 Bf5 9.Nd2 Nbd7 10.de4=.

6.Qc2 Be7 7.Ne2 Be6 (7...a5 8.cd5 cd5 9.b5+=) 8.Nd4 (8.cd5 cd5 (worse is 8...Qd5 9.Nbc3 Qd7 10.Ne4+/–; 8...Bd5?! 9.Nbc3=) 9.d3 a5 10.de4 de4=) 8...0–0 (8...a5 9.b5=) 9.Ne6 (9.Nc3 Nbd7=) 9...fe6+= 10.Be2 Qe8 (10...a5 11.c5=) 11.0–0 Qg6 (11...a5 12.c5=) 12.f3 (12.d3 a5 13.c5 Na6=) 12...Nbd7 13.fe4 (13.Nc3 a5 14.c5 ab4 15.ab4 b6=) 13...Ne4 14.Nc3 Ng5 (better is 14...Nc3!? 15.Qc3 Nb6=) 15.Qg6+/– hg6 16.Bd3 (16.Rac1 Bf6+/–) 16...Kh7 (16...Bf6 17.h4 Nf7 18.cd5 cd5=) 17.Ne2 (17.h4 Nf7 18.cd5 cd5+/–) 17...e5 (better is 17...Bf6!? 18.Bf6 gf6=) 18.cd5+/– cd5 (18...e4 19.Ba6 ba6 20.dc6+=) 19.Ng3 (better is 19.Bb5!? Nb6 20.Be5+–) 19...e4+= 20.Bb5 Nf6 21.Bd4 (21.Be5 a6 22.Be2 Nd7=) 21...a6= 22.Be2 (22.Ba4 Ne6=) 22...Rac8 (22...Bd6 23.Rac1=) 23.Rac1 (23.d3 Bd6+=) 23...Ne6 (23...Rc1 24.Rc1 Bd6 25.Nf1=) 24.Be5 Nd7 (better is 24...Rc1 25.Rc1 Rf7+=) 25.Rf8?? (25.Rc8 Rc8 26.Rf7 Re8+/–) 25...Rf8 (better is 25...Rc1 26.Rf1 Rf1 27.Bf1 Ne5–+) 26.Bb2 (26.Bg4 Ne5 27.Be6 Rd8+=) 26...Bf6 27.Bc3 Bc3 (27...b5 28.Bg4 Re8 29.Ne2+=) 28.Rc3 Ne5 (28...Nf6 29.d4+=) 29.h3 (29.a4 Rd8+=) 29...Rf7 0–1. GuestZFJR – GuestLDWL, freechess.org, 2016.

6.Qc2 Bf5 7.cd5 (7.Nf3 Bd7 8.Ne5 a5 9.ba5 Qa5 10.cd5=; 7.Ne2 a5 8.b5 Be7 9.cd5 cd5 10.Nd4=; 7.c5 b6 8.Ne2 bc5 9.bc5 Bg6 10.Nd4+=; 7.d3 a5 8.b5 cb5 9.cb5 Nbd7 10.Nc3+=) 7...cd5 8.Nf3 Nc6 9.Nd4 Bd7 10.Nc6 =.

6.Nc3 a5 7.Qa4 (7.ba5 dc4 8.Bc4 Ra5 9.Qb3 Qc7 10.Qc2 =; 7.b5 Bd6 8.bc6 bc6 9.cd5 cd5 10.Qb3=) 7...dc4 8.b5 cb5 9.Qb5 Bd7 10.Qc4 =.

6.Nc3 a6 7.c5 g6 (7...a5 8.d3=) 8.Na4 Nbd7 9.Nh3 Bg7 10.Be2 0–0 11.0–0 Qe7 12.f3 ef3 13.Bf3 Rb8 14.Qe2 Re8 15.Nf2 Ne5 16.Nb6 Nf3 17.Qf3 Bf5 18.Nh3?? (better is 18.Bd4=) 18...Ne4–+ 19.Bg7 Nd2 (19...Kg7?! 20.Ra2=) 20.Qf2 (20.Qg3 Nf1 21.Rf1 Qe3 22.Qe3 Re3 23.Bd4-/+) 20...Nf1 21.Bd4 Bh3 22.Rf1 Bf5 23.Qf3 Bc8?? (better is 23...Be4 24.Qg3 f5–+) 24.Qf4+– Bf5 25.g4?? (25.Qf3 Be4 26.Qf2–+) 25...Bd7?? (better is 25...Bd3 26.Qf6 Qf6 27.Rf6 Re7–+) 26.Nd7+/- Qd7 27.Qf6 Qg4 0–1. Nguyen Chi Binh – Hoang Ng Quang,Nguyen, VIE–ch U09 Dong Thap, 1999.

6.Nc3 Nbd7 7.d3= a5 8.Qb3 (8.b5!?=) 8...ab4+= 9.ab4 Ra1 10.Ba1 dc4 11.dc4 Bd6 12.Nge2 (12.c5 Bc7+=) 12...Qb6–/+ 13.b5? (better is 13.Na2–/+) 13...Nc5–+ 14.Qb1 Nd3 15.Kd2 Nf2 16.Rg1 Bh2 (16...Bh2 17.Nd1 Qd8 18.Bd4 Bg1 19.Ng1 Nd1 20.Qd1 c5–+) 0–1. Mothes,Rainer – Roggensack_Hanspach,Peter, corr SOK–91–73, 1991.

6.Nc3 Bf5 7.h3 (7.d3 Nbd7=) 7...Be7 (better is 7...dc4 8.Bc4 Nbd7=+) 8.f3? (8.g4 Be6=) 8...0–0 (8...Nh5 9.d3 Bh4 10.Kd2–+) 9.Nge2 (9.g4 Bg6=+) 9...ef3–/+ 10.gf3 Bd3 (10...dc4 11.Nd4 Ng4 12.Bc4 Bh4 13.Ke2–/+) 11.Rg1 (11.cd5 Nd5 12.Ng3 Bh4 13.Bd3 Bg3 14.Ke2 Be5=) 11...Bc4 (11...dc4 12.Nf4 Bf1 13.Kf1–/+) 12.d3 Ba6 13.Qd2 b5 14.0–0–0? c5 15.d4 cb4–+ 16.ab4 Bb4 17.e4 Bb7 18.Qh6 g6 19.e5 Ne8 20.Rg4 Ng7 21.Rh4=+ Nh5 22.Rg4? Ng7?? 23.Nf4?? Bc3 24.Bc3 b4?? 25.Bb4+= Qc7 26.Kd2 Rc8? 27.Bd3?? a5+= 28.Bd6 Qc3= 29.Ke2 Qb2?? 30.Ke3 Rc3 31.Rg5 Ba6?? 32.Rd2?? Qc1–+ 33.Be7 Qg1?? 34.Rg1+/– Nf5 35.Ke2 Nh6 36.Nd5 Bd3+= 37.Rd3 Rd3 38.Kd3+/– Nc6 39.Bg5 Nf5= 40.Rg4 a4 41.Nc7 Ra5 42.Bf6? a3 43.d5 a2 44.e6 fe6 45.dc6= e5 46.Be5 Re5 47.Ra4 Re3 48.Kd2 Rf3=+ 49.Nb5?? (better is 49.Ne6 Rf2 50.Kd3=+) 49...Ne7?? (50.Nd4 Rf4 51.Ra8 Rf8 52.Ra2 Nc6–/+; better is 49...Rf1 50.c7 Ne7 51.Ra8 Kf7 52.Nd6 Ke6–+) 0–1. hercules53 – johnny, Live Game Caissa's Web, 2004.

6.Nc3 Bg4 7.Qc2 Nbd7 8.d3 Bf5 9.de4 Ne4 10.cd5 cd5 (better is 10...Ng3! 11.e4 Nh1 12.ef5 Bd6=) 11.Nd5+/– Rc8 12.Qa4 1–0. GuestJCGL – GuestTGKS, freechess.org, 2017.

6.d3 dc4+= 7.dc4 Qd1 8.Kd1 Bd6 (8...Be7 9.Nc3+=) 9.Nd2 (9.Bf6 gf6 10.Nd2 f5=) 9...Nbd7 10.Ne2 (10.c5 Be5 11.Kc2 0–0+=) 10...0–0 11.Ng3 Re8 12.Be2 (12.c5 Bc7=) 12...Be5 (12...Bc7 13.Ke1=) 13.Kc2 (13.Be5 Re5 14.Rf1 Nb6=) 13...Bb2 (13...Bc7 14.Rhd1=) 14.Kb2 Ne5 (14...Nb6 15.Bd1 Be6 16.Kc3=) 15.Nde4+= Ne4 16.Ne4 Nc4 17.Bc4 Re4 8.Kc3 Bd7 (18...Bf5 19.Rhd1+=) 19.Rad1 Re7 20.Rd6 Rc8 (20...a5 21.ba5 Ra5 22.Rhd1+=) 21.Rhd1+/– Rc7 22.e4 (22.h3 a6+/–) 22...Be8 (22...b5 23.Bb3+/–) 23.Kd4 Kf8 (23...b6 24.f4+/–) 24.e5 (24.f4 b6+/–) 24...Rcd7 (24...b6 25.g4+=) 25.f4 Rd6 (25...f6 26.Kc3+/–) 26.ed6 Rd7 27.Ke5 (27.Ke4 Rd8+/–) 27...Rd8 (27...f6 28.Ke4+/–) 28.f5 f6 29.Kf4 Bf7 30.Be6 Re8 (30...b6 31.Ke4+/–) 31.g4 (31.d7 Rd8+/–) 31...g6 (31...g5 32.Kf3+–) 32.h4 (32.d7 g5 33.Kg3 Rd8+/–) 32...Kg7 (32...gf5 33.gf5 Rd8 34.Ke4+/–) 33.Rd4 (33.d7 Rd8+–) 33...Rd8 34.Ke3 (34.d7 gf5 35.Kf5 Bg6 36.Kf4 Kf8+–) 34...Be8 (34...gf5 35.Bf5 Bd5 36.d7+/–) 35.Kd3 (35.d7 Bf7+–) 35...Bd7+/– 36.Kc4 (36.Ke4 b6+/–) 36...Kf8 (36...h5 37.Bd7 Rd7 38.fg6 hg4 39.b5+/–) 37.Bd7+– Rd7 38.b5 cb5 39.Kb5 Ke8 40.Kc5 gf5 41.gf5 Rg7 (41...Kf7 42.h5+–) 42.Kd5 Rg3 (42...b5 43.Ke6 a6 44.a4+–) 43.Ke6 (better is 43.Re4!? Kd8 44.Re7 h5+–) 43...Ra3 44.Kf6 Kd7 (44...b5!? 45.Kg7 h5 46.Kg6+–) 45.Kg7 h5 46.f6 (46.Rd5 Rg3 47.Kh6 Rf3+–) 46...Rg3 47.Kh6 Rf3 48.Kg6 b5 (48...Rg3 49.Kh5 Rf3 50.Kg6+–) 49.f7 Rg3 (49...b4 50.Rb4 Ke6 51.Re4 Kd6+–) 50.Kf5 (50.Kf5 Rf3 51.Rf4 Rf4 52.Kf4 Kd6 53.f8Q Kc6 54.Qh6 Kc5 55.Qa6+–) 1–0. Skonieczny,Jerzy – Szczesiak,Zenon, corr 2AMM Poland, 1994.

6.d3 dc4!? 7.Nd2 cd3 8.Bf6 gf6 9.Ne4 f5+=.

6.d3 ed3 7.Qd3 Be7 8.Nf3 0–0 9.Nbd2 a5 10.b5 Nbd7 11.Be2 Nc5 12.Qc2 Bg4 13.0–0 Qb6 14.Bd4 Nfd7 15.Nb3 a4 16.Nc5+/– Bc5?? 17.Ne5 Ne5=+ 18.Be5 Be2 19.Qe2 Rfe8 ½–½. tightfist (2245) – sisterofmercy (2525), net–chess.com, 2010.

6.d3 Be7 7.cd5= cd5 8.de4 Ne4 (8...de4!? 9.Qd8 Bd8+=) 9.Bg7+/– Rg8 10.Bb2 Bf6 (10...Nc6 11.Nc3 Bf6 12.Rc1+/–) 11.Bf6 Qf6 Do you see the mate threat? 12.Ra2 Be6 13.Rc2 Nc6 14.Nf3 Rd8 15.b5 Ne5 16.Ne5 Qe5 17.b6 (17.Nd2 Nd2 18.Rd2 Qc3+/–) 17...ab6 (17...d4 18.Qd3 (worse is 18.ba7 Qa5 19.Rd2 de3 20.fe3 Nd2 21.Nd2 Qa3–+) 18...a6 19.ed4 Rd4 20.Qe3=) 18.Nd2+= h5 (18...Ra8 19.Nf3 Qd6 20.Bb5 Bd7 21.Nd4 Rg2 22.Nf5+=) 19.Qb1 (19.Bb5 Ke7 20.Nf3 Qf6+/–) 19...Qd6 (19...Nd2 20.Rd2 Qc3 21.Qb5 Rd7 22.Qa4+/–) 20.a4 (20.Qb2 Ra8+=) 20...Nc5 21.Rb2 Attacking the isolated pawn on b6 (21.Qd1 d4 22.Bb5 Bd7 23.ed4 Bb5 24.ab5 Nd3 25.Kf1 Qd4+=) 21...Na4= 22.Bb5 (22.Rb3 Rc8=) 22...Bd7 23.Ba4 Ba4 24.Rb6 (24.0–0 Qg6 25.Qg6 Rg6=) 24...Bc6 25.g3 h4 (25...d4 26.e4+=) 26.Qh7 (26.Nb3 Qh6 27.Rf1 hg3 28.hg3 Qf6+=) 26...Rg4= 27.Qf5 (27.Qh8 Ke7 28.Qb2 d4=) 27...Ra4 (27...Qe6 28.Qe6 fe6 29.f3+=) 28.0–0 (28.Rg1 Ra1 29.Nb1 d4 30.gh4 Kf8=) 28...Qc5 (28...d4 29.ed4 Qd4 30.Re1 Kf8 31.Rb2+=) 29.Rfb1 hg3 30.hg3 Rda8?? (better is 30...Qe7=) 31.Rb7!+– Bb7 (31...Qd6 32.Qf7 Kd8 33.R1b6+–) 32.Rb7 Qc6 (32...Qe7 33.Re7 Ke7 34.Qe5 Kf8 35.Qd5 R4a5 36.Qd6 Kg7+–) 33.Qf7 Kd8 34.Qf8 Qe8 35.Qd6 1–0. pierre (2345) – JayFlix (1810), ChessWorld.net, 2005.

6.d3 Bg4 7.Be2 Be2 8.Ne2 ed3 (8...dc4 9.dc4= 9...Nbd7 10.Ng3 a5=) 9.Qd3 dc4 (9...a5 10.b5 Nbd7=) 10.Qc4 Be7 (10...Bd6=) 11.0–0 0–0 12.Nbc3 Nbd7 13.Rad1 Qc8 14.Nd4 Ne5 15.Qe2 c5 16.bc5 Qc5 17.Rc1 Qc4 18.Rfd1 Rfd8 19.Nf5 Bf8 20.h3 Nd3 (20...Rd1 21.Rd1 (21.Qd1? Nd3–+) 21...Ba3 22.Ba3 Qc3 23.Qb2 Qb2 24.Bb2=) 21.Rb1 b5 (21...Rac8 22.Nb5 Qb5 23.Nd4=) 22.Nd4 (22.Nb5 Ne4 23.Nh6 Kh8 24.Bd4 Nef2 25.Rf1+–) 22...Nb2= 23.Qb2 a6 24.Rdc1 Qd3 25.a4 b4 26.Nce2 Rdb8 27.Nc6 Rb6 28.a5 Rb7 29.Rd1 Qe4 30.Rbc1 Rd7 31.Ned4 Rd5 32.Qb3 (32.Nb4 Rb8 33.Rc4 Rdb5 (33...Ra5 34.Qb3 Rg5 35.g3–/+) 34.Nb5 Qc4–+) 32...Re8 33.Rc4 Rg5 34.g3 Nd5 35.Nc2 (35.Nc2 Qg6 36.Rd2= (36.N2b4 Rg3 37.fg3 Qg3 38.Kh1 Qh3 39.Kg1 Ne3–+; 36.N6b4 Rg3 37.Kf1 Rg1 38.Ke2 Qh5 39.Rg4 Nf4 40.Kd2 Bb4 41.Qb4 Qd5 42.Qd4 Rd1 43.Kd1 Qf3 44.Kd2 Qf2 45.Kd1 Qe2 46.Kc1 Nd3 47.Qd3 Qd3–+)). Drefke – Roggensack_Hanspach, corr SOK–87–14, 1987.

6.d4 dc4 7.Bc4 b5 8.Bb3 a5 9.Nc3 ab4 10.ab4 Ra1 11.Qa1 Bb4 12.Nge2 0–0 13.0–0 Bc3 14.Bc3 Qe7 15.Ng3 c5 (better is 15...Be6 16.Bc2 b4=+) 16.dc5+/– Qc5?? (16...Be6 17.Bf6 Qf6 18.Qf6 gf6 19.Be6 fe6 20.Ne4+/–) 17.Rc1 (better is 17.Bf6 gf6 18.Ne4+–) 17...Qg5 18.Bf6 Qf6 19.Qf6 gf6 20.Ne4 f5 21.Nd6 Bd7 22.Rc5 Rd8 23.Nf7+– Kg7?? 24.Ne5 Be6+/– 25.Rc7 Kh8 26.g3?? Bb3–+ 27.Kg2 Bd1?? 28.Nf7+– Kg8 29.Nd8 b4 30.Rc8 b3 31.Rb8 b2 32.Ne6 1–0. slavisa22 – ataxonyoass, Live Game Caissa's Web, 2004.

6.d4 dc4 7.Bc4 Bd6 8.Ne2 a5 9.b5= Be6 10.Be6+= fe6 11.Qb3 Qd7 12.Nbc3 0–0 13.0–0 Qf7 14.f3 ef3 15.Rf3 cb5 16.Nb5 Ra6 17.Nd6 Rd6 18.Raf1 Rc6 19.e4! Qc7 20.d5 Rb6 21.Qc3 Qc3 22.Bc3 ed5 23.ed5 Rd6 24.Bf6 Rff6 25.Rf6 gf6 26.Rd1 b5+= 27.Kf2 b4 28.ab4 ab4 29.Rd3 Na6 30.g4 Nc5= 31.Rd1 b3 32.Ke3 Kf7 33.Kd4+= Nb7 34.Rb1 Rb6 35.Kc3 Na5 36.Nd4 Rd6= 37.Nb3 Nb3 38.Rb3 Rd5 39.Kc4 Rd2 40.h4?? Rg2–+ 41.Rb7 Kg6 42.h5 Kh6 43.Kd5 Rg4 44.Ke6 Rf4 45.Rb5=+ Rf1 46.Rb7?? Kh5–+ 47.Rh7 Kg6 48.Rh2 Re1 49.Kd5 f5 50.Rg2 Kf6 51.Rf2 Rd1 52.Kc4 Rd7 53.Rf1 Rc7 54.Kd5 Rf7 55.Rf2 Rd7 56.Kc4 Rd8 57.Rf1 Rd2 58.Kb3 Kg5 59.Rg1 Kf6 60.Rf1 Kg5 61.Rg1 Kf4 62.Rf1 Kg4 63.Rg1 Kf3 64.Kc3 Re2 65.Rf1 Kg4 66.Rg1 Kf3 67.Rf1 Kg4 68.Rg1= Kf3 ½–½. Doctor? 3.0 – Crafty 19.01, 2004.

6.d4 Bd6 7.Nd2 0–0 8.Ne2 a5 9.c5 Bc7 10.b5 cb5 11.Nc3 Nc6 12.Nb5 Bb8 13.Be2 Nd7 14.0–0 f5 15.Qb3 Nf6 16.Rfc1 (16.Nc3 Re8+=) 16...f4 17.Nf1 Bg4 (17...Qe8 18.Nc3 fe3 19.fe3=) 18.Nc3 (18.Bg4 Ng4 19.Nc3 fe3 20.fe3 Rf1 21.Kf1 Qf6 22.Kg1 Qf2 23.Kh1–+) 18...Be2 19.Ne2 f3 20.Neg3 (20.gf3!? ef3 21.Neg3-/+) 20...fg2-/+ 21.Kg2 Qd7 22.Rab1 Bg3 (22...Ng4 23.Rc2-/+) 23.Ng3 h5 24.h3 h4 25.Ne2 Qf5 26.Nf4 (26.Qb7 Qf3 27.Kg1+=) 26...Ne7 (better is 26...g5 27.Ne2 Qf3 28.Kf1 a4–+ (28...Qh3?! 29.Ke1–+)) 27.Qb7+= Ng6 28.Qc7 Nf4 29.Qf4 (29.ef4 Nh5 30.Rc3 Nf4 31.Kh1 e3 32.Qf4 Qb1 33.Rc1 Qb2 34.Qe3 Rf2 35.Qf2 Qf2 36.c6 Qf3 37.Kg1 Qe3 38.Kh2 Rf8 39.Rb1 Rf2 40.Kh1 Qh3 41.Kg1 Qg2) 29...Qg6 (better is 29...Qf4 30.ef4 Nh5+=) 30.Kf1 Nh5 31.Qh4 Rf3 32.Ke2 (32.Qg4 Qf7+=) 32...Raf8 33.Rg1 Rf2 (33...Qa6 34.Ke1 Qd3–+) 34.Qf2+= Rf2 35.Kf2 Qf5 36.Ke2?? (better is 36.Ke1 Qh3 37.Kd2=) 36...Qf3–+ 37.Kd2 Qf2 38.Kc3 Qe3 39.Kc2 Qd3 40.Kc1–+ Nf4 41.Re1 e3 (41...e3 42.Ra1 Qd2 43.Kb1 Nd3–+) 0–1. Evstratenko,Vasily (1745) – Narchuk,Margarita, Novosibirsk March op, 2008.

6.d4 Be6 7.Nd2 (7.cd5 cd5 8.Nc3 Be7+=) 7...Be7 (7...Bd6 8.cd5 cd5 9.Nb3+=) 8.Qc2 (8.cd5 Bd5 9.Ne2 a5 10.ba5 Qa5=) 8...0–0 (8...a5 9.ba5 Qa5 10.c5+=) 9.Ne2 Nbd7 10.Nf4 Bf5 11.f3 g5 (better is 11...h6=) 12.g4? (better is 12.Ne2!? Bg6 13.Qb3=) 12...gf4–/+ 13.gf5 fe3 14.Ne4 Nh5 (14...de4!? 15.fe4 Ne8 16.Rg1 Kh8–/+) 15.Ng3 (15.Rg1 Kh8 16.cd5 Bh4 17.Ng3 cd5+=) 15...Nhf6 (15...Nf4 16.Rg1 Kh8 17.Bc1+=) 16.Bd3 (16.Rg1 Re8=) 16...Re8 (16...dc4 17.Bc4 Nb6 18.Be2+=) 17.Qg2 Kh8 18.Ke2 (better is 18.c5!?=) 18...Bd6 ½–½. Ramirez – Luzuriaga,Norberto Horacio, corr, 1985.

6.Be2 dc4 7.Bc4 b5 8.Ba2+=.

6.Be2 Nbd7 7.d3= Be7 (7...a5 8.cd5 cd5 9.b5=) 8.cd5 cd5 9.de4 de4 10.Nc3 (10.Nd2 0–0=) 10...0–0 (10...a5 11.Qa4=) 11.Qc2 (11.Qd4 Nb8 12.f3 ef3 13.Nf3=) 11...b6 (better is 11...a5!? 12.b5 Nc5=) 12.Ne4+= Bb7 13.Bf3 (13.Nf6 Bf6 14.Nf3 Rc8+/–) 13...Rc8 (13...Be4 14.Be4 Rc8 15.Qd3=) 14.Qd3 (14.Nc3 Qc7+=) 14...Qc7 (14...Be4 15.Be4 Ne4 16.Qe4+=) 15.Ne2 (15.Rc1 Qb8 16.Rc8 Rc8+/–) 15...Rfd8 (better is 15...Ne5 16.Nf6 Bf6 17.Be5 Qe5=) 16.0–0?? (16.Nf6 Nf6 17.Qf5 Bf3 18.Qf3 Qd7+=) 16...Nf8?? (better is 16...Ne4 17.Be4 Nf6–/+) 17.Nd4 Qb8 (17...Ne6 18.Rac1 Nd4 19.ed4+/– (worse is 19.Bd4 Qc1 20.Nf6 Bf6 21.Bb7 Rc7+=)) 18.Rfc1 Ne6 (18...Ng6 19.Rc8 Qc8 20.Rc1+/–) 19.Rc8+– Qc8 20.Nf6 (20.Nf5 Qc7 21.Ne7 Kf8+–) 20...Bf6+/– 21.Bb7 (21.Rc1 Qd7 22.Bb7 Qb7+/–) 21...Qb7 22.Qf5 (22.Rd1!?+/–) 22...Nd4+= 23.ed4 (23.Bd4 Bd4 24.ed4 Rd4+=) 23...Bd4 24.Bd4 Rd4 25.Qe5 (25.Re1 Rd8+=) 25...Rd8 (25...Qd7 26.Re1 h6 27.h3=) 26.Re1 Qd7 (26...h6 27.h3=) 27.Kf1 (27.h3 f6 28.Qe7 b5=) 27...h6 28.Qe7 Qd3 29.Kg1 Rd7 30.Qe8 Kh7 31.h3 Qd6 32.Qe5 (32.Qe4 Qg6=) 32...Qc6 (32...Qe5 33.Re5 Kg6 34.Re3=) 33.Qe4 (33.Qf5 g6 34.Qe5 Qc7=) 33...Qe4 34.Re4 Kg6 (34...a6 35.Rc4=) 35.Kf1 (35.b5 Kf6=) 35...Kf5 36.Re3 g6 37.Ke2 g5 (37...a6=) 38.f3 (38.g4 Kf6=) 38...f6 (38...Kf4!? 39.g4 Kg3+=) 39.g3 (39.g4 Kg6=) 39...h5 (39...Rc7 40.g4 Kg6 41.Kd3=) 40.Re4 (40.b5 Rd5 41.a4 h4 42.gh4 gh4=) 40...Kg6 (40...b5 41.g4 Kg6 42.Re8=) 41.Re3 (41.b5 Kf7+=) 41...Kf7 (41...b5 42.Rc3=) 42.Rd3 (42.b5 Rd5 43.a4 Rc5=) 42...Ke6 43.Rd7 Kd7 44.f4 (44.Ke3 Ke6=) 44...g4 45.hg4 hg4 46.Kd3 Kd6 (46...Ke6 47.Kc4=) 47.Ke4 Ke6 48.f5 Kd6 49.Kd4 (49.b5 Kc5+=) 49...a6 50.a4 Kc6 51.Kc4 ½–½. Trkn – santiago, itsyourturn.com, 2000.

6.Be2 Be7 7.Qc2 (7.d3 dc4 8.dc4 Qd1 9.Bd1 a5+=) 7...0–0 8.d4 (8.d3 ed3 9.Bd3 dc4 10.Bc4 a5+=) 8...Be6 9.Nd2 Nbd7 (9...a5 10.ba5 Qa5 11.c5+=) 10.c5 Re8 (10...Qc7 11.f3 Bf5 12.Qc3+=) 11.Bd1 Nf8 (11...a5 12.ba5 Ra5 13.Ne2+=) 12.Ne2= Ng6 13.Ng3 (13.0–0 Qc7=) 13...Qd7 (13...Nh4 14.0–0=) 14.Be2 (14.0–0 Nh4 15.Ne2 Bg4=) 14...Bd8 (14...Nh4 15.Bf1+=) 15.Nh5 (15.0–0 Bg4+=) 15...Nh5–/+ 16.Bh5 Bg4 (16...Nh4 17.Rg1–/+) 17.Bg6+= hg6 (17...fg6 18.Qb3+=) 18.h3= Be6 19.Qb3 (19.Qc3 a5=) 19...Bc7 20.a4 White intends b5 (20.Qc3 Qe7=) 20...Rab8 (20...Qe7 21.b5+=) 21.b5 (21.Qc3 a5=) 21...Ba5 (21...Qd8 22.Rb1+=) 22.Ba3 (22.Bc3 Bd8=) 22...Bd2 (22...b6 23.Rb1=) 23.Kd2= f5 (23...a6 24.Rhb1 Qc7 25.Qd1=) 24.Bc1 (24.Rab1 g5+=) 24...Qf7 (24...b6 25.Rb1=) 25.Kc2 (25.Rb1 Qd7+=) 25...a6 (25...b6 26.Ba3=) 26.Rb1 (26.b6 g5+=) 26...Qc7 (26...ab5 27.ab5 Qc7=) 27.Bd2 (27.b6!? Qe7 28.Kb2+=) 27...ab5+= 28.ab5 Ra8 (28...b6 29.cb6 Qb6 30.Rhc1+=) 29.g3 (29.Kd1 Reb8=) 29...Qd7 (29...Reb8 30.Rhc1=) 30.bc6 bc6 31.Ra1 (31.Rb2 Ra7=) 31...Qc7 (31...g5 32.Rhb1=) 32.Qb6= Qb6 (better is 32...Qc8!?=) 33.cb6+/– Ra1 34.Ra1 Rb8 35.Rb1 (35.Ra6 g5+/–) 35...Rb7 36.Bc1 (36.Ba5 Kf7+/–) 36...Kf7 (36...g5 37.Ba3+/–) 37.Ba3 Ke8 (37...g5 38.Bc5+/–) 38.Bc5 (38.h4 Kf7+/–) 38...Kd7 (38...g5 39.Ra1+/–) 39.Ra1 (39.h4 Kd8+/–) 39...Kd8 (39...g5 40.Ra7 Kc8 41.Kd2+/–) 40.h4 Bc8 (40...Kc8 41.Kc3+–) 41.Ra7 Kd7 42.Rb7 (42.Kd2 Ke6+/–) 42...Bb7+/– 43.Kc3 (43.g4 Ba6+/–) 43...Bc8 (43...Ba6 44.g4!+/–) 44.Kb4 Ba6 45.Ka5 (45.Bf8 Kc8+/–) 45...Bb7 (45...Be2!?+/–) 46.Bf8+– Ke8 (46...Bc8 47.Kb4+–) 47.Bg7 (47.Bd6 Kf7+–) 47...Ke7 (47...Kd7 48.Be5+–) 48.Be5 Ke6 49.Kb4 Ke7 50.Kc3 Kf7 51.Kd2 (51.g4 fg4 52.Kb4 Ke7+/–) 51...Kg8 (51...Ke6 52.Bc7+/–) 52.Kc2 Kf7 53.Kd2 Kg8 54.Kc2 Kf7 55.Kd2 (55.g4 fg4 56.Kc3 Ke6+–) 55...Kg8+/– 56.Ke1 (56.g4 fg4 57.Kc3 Kf7+/–) 56...Kh7 (56...Kf7 57.g4! fg4 58.Kd2+/–) 57.Kf1 (57.f3 ef3 58.Kf2 Kg8+/–) 57...Kg8 58.Kg2 (58.f3 ef3 59.Kf2 Kf7+/–) 58...Kf7+/– 59.f3 Ke6 60.Bc7 (60.Bf4 ef3 61.Kf3 Ba6+–) 60...Ba6 61.fe4 de4 62.Kh3 Bc8 (better is 62...Bf1 63.Kh2 Ba6+/–) 63.Kg2 (better is 63.g4!?+–) 63...Kd5 (63...Ba6 64.g4 fg4+/–) 64.Kf2 (64.g4 fg4 65.Kg3 Kc4+/–) 64...c5 65.dc5 Kc5 66.Ke2 (66.g4 fg4 67.Kg3 Kc4+/–) 66...Kc4 (66...Ba6 67.Ke1+/–) 67.Kd2 (67.g4 fg4 68.Kf2 Kd5+/–) 67...Bb7 68.Bd8 (68.Ke1 Kd5+=) 68...Kb3 (68...Kc5 69.Kc2+=) 69.Bc7 (69.Ke2 Kc4+/–) 69...Kc4+= 70.Bd8 (70.Ke1 Kd5+/–) 70...Kd5 (70...Kb3 71.g4 fg4 72.Ke2+/–) 71.Bc7 (71.Bf6 Kc6 72.Bd4 Ba6+=) 71...Kc6 (71...Kc4 72.Ke1+/–) 72.Kc3 (72.Ke2 Kd5+/–) 72...Kd5 (72...Kc5 73.Bd8+=) 73.Bd8 (73.Kb4 Bc6+/–) 73...Kd6 (73...Kc5 74.Kb3+=) 74.Bc7 (74.Kc4 Bd5 75.Kd4 Ke6+/–) 74...Ke6 (better is 74...Kd5!?=) 75.Kd4+/– Bc6 ½–½. Tudose,Matei_Ovidiu (1615) – Balan,Bogdan, Campionatul National de sah Pentru Copi, 2015.

6.Ne2 Be7 7.Qb3 Be6 (7...0–0 8.Nd4+=) 8.Nf4= dc4 9.Bc4 Bc4 10.Qc4 0–0 11.0–0 (11.Bf6 Bf6 12.Nc3 Qe7=) 11...Nbd7 12.d4 (12.Bf6 Nf6 13.Nc3 Re8+=) 12...Re8 13.Nd2 Bd6 14.Rae1 (14.Rfe1 Nb6 15.Qb3 a5–/+) 14...Qc7 (14...Nb6 15.Qc2–/+) 15.g3 Nb6 16.Qc2 a5 17.Nc4 (17.Bc3!?–/+) 17...Nc4 18.Qc4 ab4 19.ab4 b5 20.Qb3 Ra4 21.Bc3 Bf4 (21...g5 22.Ne2–/+) 22.ef4 Nd5 23.Ra1 Qe7 (23...Rea8 24.Qc2–/+) 24.Bd2+= Qa7 25.Ra4 Qa4 (25...ba4 26.Qc4 Qb6 27.Rc1+=) 26.Qa4 ba4 27.Ra1 (27.Rc1!?+=) 27...Ra8–/+ 28.Kf1 a3 (28...f5 29.Ke2–/+) 29.Ra2 (29.Ke2 Nc7–/+) 29...Nc7 30.Ke2 Nb5 31.Ke3 (31.g4!?–/+) 31...f5–+ 32.h3 (32.f3 ef3 33.Kf3 Rd8–+) 32...Kf7 33.g4 (better is 33.f3 Re8 34.Bc1–+) 33...Ke6 34.gf5 Kf5 35.Bc1 (35.f3 Re8 36.Bc1 ef3 37.Kf3 Nd4 38.Kf2 Nb5–+) 35...Rd8 (35...Ke6 36.h4–+) 36.Ba3?? (36.Rd2–+) 36...Ra8 0–1. latmartinsh (1785) – housemd (1905), gameknot.com, 2014.

6.h3 Bd6 7.d3 0–0 8.cd5 cd5 9.de4 de4 10.Bc4 Nc6 11.Ne2 Ne5 12.Nd2 Be6 13.Be6 Nd3 14.Kf1 fe6 15.Bf6 Qf6 Do you see the mate threat? (worse is 15...Rf6 16.Ne4 Be5 17.Nd4 Bd4 18.ed4 Qd4 19.Nf6 Qf6 20.Ra2+=) 16.Ne4 Qe5 17.Nd6 Rf2 (17...Qd6 18.Nf4 Rad8 19.Nd3 Qd3 20.Qd3 Rd3 21.Ke2+/–) 18.Kg1 Qe3 (18...Qd6 19.Nf4 Rf4 20.ef4 Qd4 21.Kh2 Qf4 22.Kg1 Qe3 23.Kh2 Qe5 24.Kg1+=) 19.Nc4 (19.Nb7 Re2 20.Kh2 Qf4 21.Kg1 Qf2 22.Kh2 Qg2) 19...Rg2!? (19...Rg2 20.Kg2 Qf2; 19...Qe2?! 20.Qe2 Re2 21.Nd6–/+) 0–1. Maciejewski,Roman – Garbacki,Michal, corr 1AMM Poland, 1991.

6.h3 Be6 7.c5 g6 8.Ne2= (8.Nc3 Nbd7 (8...Bg7 9.Nge2 0–0 10.Nd4 Nbd7 11.Be2 Ne5 12.0–0 Qe7 13.Qb3 Nc4; 8...Qe7 9.Nge2 Bg7 10.Nf4 0–0 11.d4 ed3 12.Bd3 Nbd7 13.Ne6 Qe6; 8...Bh6 9.Nge2 0–0 10.Nd4 Qe7 11.d3 Nbd7 12.de4 de4 13.Qc2 a5; 8...Be7 9.Nge2 0–0 10.Nf4 Nbd7 11.Nce2 Ne8 12.Nd4 Ng7 13.Be2 Qc7) 9.Nge2 Bg7 10.Nd4 0–0 11.Be2 Ne5 12.0–0 Qe7 13.Qb3 Nc4; 8.d3 Be7 (8...Nbd7 9.de4 de4 10.Nd2 Be7 11.Ne4 0–0 12.Nd6 Bd5 13.Ne2 Qc7; 8...Bg7 9.de4 0–0 10.ed5 Nd5 11.Bg7 Kg7 12.Nf3 Qf6 13.Qd4 Qd4) 9.de4 de4 10.Qd8 Bd8 11.Nc3 0–0 12.Nge2 Bc7 13.Nd4 Nbd7) 8...Bg7 (8...Nbd7 9.Nbc3 Bg7 10.Nf4 0–0 11.Be2 Ne5 12.Qc2 Bf5 13.Na4 Qe7; 8...Bh6 9.Nbc3 0–0 10.Nd4 Qe7 11.Qc2 a5 12.Be2 ab4 13.ab4 Ra1; 8...Be7 9.Nbc3 0–0 10.Nd4 Nbd7 11.Be2 Ne5 12.Ne6 fe6 13.0–0 Qc7) 9.Nd4 (9.Nbc3 Nbd7 10.Nf4 0–0 11.d4 ed3 12.Ne6 fe6 13.Bd3 b6) 9...Qe7 (9...0–0 10.Be2= (10.Nc3 Nbd7 11.Ne6 fe6 12.Be2 Ne5 13.0–0 Nfd7) 10...Qe7 11.Nc3 Nbd7 12.0–0 Ne5 13.Qb3 Nc4) 10.Nc3 (10.Ne6 Qe6 11.d4 (11.Nc3 Nbd7 12.Ne2 0–0 13.Nd4 Qe7) 11...ed3 12.Bd3 Nbd7= (12...0–0 13.0–0 Nbd7) 13.0–0 Ne5) 10...a6 (10...0–0 11.d3= (11.Be2 Nbd7 12.0–0 Ne5 13.Qb3 Nc4) 11...Nbd7 12.Qc2 ed3 13.Bd3 Ne5) 11.Nce2 (11.Ne6 Qe6 12.d4 ed3 13.Bd3 0–0) 11...0–0 12.Qc2 (12.Nf4 Bc8= 13.h4 h6) 12...Nbd7 (12...a5 13.Nf4= ab4) 13.Nf4 a5 (13...Nh5+=) 14.Be2 ab4 15.ab4 (15.Nde6? fe6 16.ab4 Ra1 17.Ba1 g5 18.Nd5 ed5–+ (worse is 18...cd5 19.0–0–+)) 15...Ra1 16.Ba1 Ra8 17.0–0 Ne8 (17...Nf8 18.Bc3=) 18.Nfe6 (18.Nde6? Ba1 (18...fe6?! 19.Bg7 Ng7 20.d4+=) 19.Nd4 Bd4 20.ed4 Qf6–+) 18...fe6 19.Nb3 (19.Bb2 Nc7+=) 19...Ba1 20.Ra1 Ra1 21.Na1 b6? (21...Nef6 22.Qa4 Ne5 23.Nb3+=) 22.Nb3 (22.cb6!? Nb6 23.Qc6+–) 22...Nef6 (22...bc5 23.bc5 Kf7 24.Qc3=) 23.d3 (better is 23.b5!? cb5 24.c6+/-) 23...bc5= 24.bc5 e5 25.d4 ½–½. Asmund,E (1735) – Londalen,Sindre, Politiken Cup, 2011.

6.Qc2 Be6

7.Nc3 a5 8.cd5 cd5 9.b5 Nbd7 10.Nge2 +=.

7.c5 Be7 8.d3 0–0 9.Nd2 ed3 (9...Bf5 10.de4 Ne4 11.Bd3=) 10.Bd3 b6 11.Nb3 a5 12.Nf3 a4 13.Nbd4 bc5 14.bc5 Qa5 15.Bc3 Qc5 16.0–0 (16.Ng5!? Bg4 17.h3=) 16...Bc8 17.Rfb1 Qa7 (17...Re8 18.Ng5 h6 19.Ngf3+=) 18.Ne5 Qc7 19.f4 (19.Nf5 Bf5 20.Bf5 Bd6=) 19...h6 20.Bb4 Increases the pressure on c6 20...c5 21.Nb5 (21.Rc1 Nbd7 22.Nd7 Nd7+=) 21...Qb6 22.Bd2 Qd8 23.Na7 (23.Nc3 c4 24.Be2 Qe8–/+) 23...Ra7 24.Rb8 Qc7 (24...c4 25.Be2–/+) 25.Qb2 c4 26.Bc2 Bc5 27.Qb5 (27.Rb1!?–/+) 27...c3! 28.Bc1 (28.Bc3 A deflection 28...Be3 Discovered attack) 28...Ra6 (28...Bd6 29.Nc6–/+) 29.Rb1 (29.Ba4!? Ra5 30.Qb3–/+) 29...Ba7–+ 30.Rc8 Qc8 31.Qd3 Ne4 (better is 31...Rd8!?–+) 32.Qd5–/+ Nf6 33.Qa2 Ng4 34.Ng6? (better is 34.Ng4 Qg4 35.Qc4–/+) 34...Re8–+ (34...Rg6?! 35.Bg6 Ne3 36.Kh1–/+; 34...Be3?! 35.Be3 Rg6 36.Bg6 Ne3 37.Be4–/+) 35.h3 (35.Ne5 Ne5 36.fe5 Re5 37.h3–+) 35...Ne3 (35...Rg6 36.Bg6 Qe6 37.Qe6 Re6 38.Bf5 Ne3 39.Be6 fe6 40.Rb7+=; worse is 35...Be3 36.Be3 Ne3 37.Bd3–+) 36.Be3 Re3 (36...Rg6 37.Ba7 Re2 38.Bf2=) 37.Kh2 Re8 (37...Rd6 38.Ne5 Qh3 39.gh3 Rd2 40.Kh1 Rh3) 38.Rb4 (38.Ne5 Qe6 39.Qe6 Ree6–+) 38...Bb8 (38...Qc5!? 39.Rb1–+) 39.Ra4 Rg6?? (39...Rg6 40.Bg6 Qc7+=; better is 39...Ra4 40.Ba4 Re6–+) 0–1. Dzuris,I – Prielozny,Stanislav, SVK–chT1E, 1999.

7.d3 a5 8.cd5 cd5 9.de4 de4 10.ba5 +=.

7.d4 a6 8.Nd2 b5 9.c5 a5 10.Ne2 ab4 11.ab4 Ra1 12.Ba1 Be7 13.Nf4 Bd7 14.f3 ef3 15.gf3 g6 16.Bd3 Na6 17.Bc3 Nc7 18.Nb3 Ne6 19.Ne6 Be6 20.Ke2 Nh5 21.Ra1 0–0 22.Ra6 Qc7 23.Kd1 f5 (23...Re8 24.Na5 Bd7 25.Qg2=) 24.Na5 (better is 24.Bb5!? Bd7 25.Bd3+/–) 24...Bd7= 25.Be1 Bg5 26.Qf2 Re8 27.Bd2 Ng7 28.f4 (28.Qg3!? Qc8 29.Ra7+/–) 28...Bf6 29.Rb6 Re7 30.Bb5 cb5 31.Rf6 Be6 32.Qg2 Nh5 (better is 32...Qc8!?+=) 33.Re6+= Re6 34.Qd5 Kf7 35.c6 Qb6?? (better is 35...Nf6 36.Qb5 Re7+/–) 36.Nb7+– Kf6 (36...Nf6 37.Nd8 Kf8 38.Qc5 Qc5 39.dc5 Rc6 40.Nc6 Nd5+–) 37.Nd8 Re7 38.Qd6 Kg7 39.Qe7 Kh6 40.d5 Qa6 41.Ne6 Qa1+– 42.Ke2 Qb2 43.Qg5 1–0. combijack (1800) – ciano999 (1715), gameknot.com, 2013.

7.cd5 cd5 8.d3 a5 9.de4 ab4 10.e5 =.

7.Ne2 a5 8.ba5 dc4 9.Nf4 Bd5 10.Bc4 =.

6.Nc3 dc4

7.Qb1 Bf5 8.Bc4 Nbd7 9.Nf3 Nb6 10.Bb3 =.

7.Qc2 Bd6 8.Ne4 +=.

7.Qc2 Bf5 8.Bc4 Nbd7 9.Nf3 ef3 10.Qf5 =.

7.Bc4 b5 8.Ba2 a5 9.Nge2 Bd6 10.Qc2 +=.

6.Nc3 Bd6

7.Qc2 0–0 8.cd5 cd5 9.Nb5 Nc6 10.Nd6 =.

7.d3 0–0 8.de4 Ne4 (8...de4 9.c5 Bc7 10.Qd8 Rd8 11.Rd1+=) 9.Nf3 (9.Ne4 de4 10.Qd4 Qf6+/–) 9...Bg4 (9...Nc3!? 10.Bc3 Be6+=) 10.cd5 Nc3 11.Bc3 cd5 (11...c5!?+/–) 12.Qd4+– (12.Qd5?! Bb4 13.Qd8 Bc3 (13...Rd8?? 14.ab4 Bf3 15.gf3+–) 14.Qd2 Bd2 15.Nd2 Nc6=) 12...Qf6 13.Qf6 gf6 14.Bf6 Nd7 15.Bd4 f6 16.Be2 Ne5 (better is 16...a5!? 17.b5 Rac8+–) 17.Ne5 fe5 18.Bb2 (better is 18.Bc5 Be2 19.Bd6+– (19.Ke2?! Bc5 20.bc5 Rac8+/–)) 18...Be2+/– 19.Ke2 Rac8 20.Rac1 Kf7 21.Rc8 Rc8 22.Rc1 Rg8 23.g3 Ke6 24.f4 (24.Rc2 e4+/–) 24...e4? (better is 24...ef4!? 25.ef4 Bf4=) 25.Bd4+/– b6 26.Rc6 Kd7 27.Rc2 h5 28.Kf2 Rg6 29.Rc1 h4 30.Rg1 hg3 31.hg3 Rh6 32.g4 Rh2 33.Rg2 Rh1 (33...Rg2 34.Kg2 a5 35.ba5 ba5 36.a4+–) 34.Kg3 (34.g5 Rc1+–) 34...Rf1 35.g5 Ke6 (35...a5+–) 36.g6 Bf8 37.g7 (better is 37.Kh2 a6 38.g7 Bg7 39.Rg6 (worse is 39.Bg7 Rd1+–) 39...Kf5 40.Rg7+–) 37...Bg7 38.Bg7 Rf3 39.Kg4 Re3 40.Bb2 Rf3 41.Rg3 Rf2 42.Bd4 Rd2 43.f5 Kf7 44.Bc3 Ra2? (44...Rd1 45.Be5+–) 45.Be5 (better is 45.Kf4!? Ra3 46.Ke5 a5 47.ba5 ba5 48.Kd5 e3 49.Re3 Rb3+–) 45...Rd2 46.f6 (better is 46.Rc3 Rg2 47.Kh4+–) 46...d4?? (better is 46...Ke6 47.Bc3 Rd1+–) 47.Kf4 (better is 47.Kf5 Rf2 48.Ke4+–) 47...e3 (47...Ke6 48.Rg7 d3+–) 48.Rg7 Ke6 49.Re7 (49.Ke4 d3 50.Re7) 49...Kd5+– 50.Bd4! Kd4 (50...Rd4 51.Ke3 Decoy; 50...Kd4 51.Rd7 Double attack) 51.Re3 Rf2 52.Rf3 Rh2 53.Kf5 Rh8 54.f7 Kd5 55.Kg6 Ke6 (55...Kc4 56.f8Q Rf8 57.Rf8+–) 56.f8Q Rf8 57.Rf8 1–0. Fournier,Frederic (1975) – gaujun2 (1945), Active, 2005.

7.d3 Bg4 8.Be2 Be2 9.Nge2 a5 10.c5 =.

7.cd5 cd5 8.Nb5 Be7 9.Nd4 (9.Ne2 0–0=) 9...0–0 10.Nge2 Bg4 (10...Nc6!?+=) 11.h3= Bh5 (11...Bc8 12.Rc1=) 12.Qb3 (12.g4 Bg6+/–) 12...a5+= 13.b5 (13.Nf4!?+=) 13...Nbd7= 14.Nf4 Nc5 15.Qa2 Bg6 16.a4 Rc8 17.Be2 Qd7 18.0–0 Bd6 19.Ng6 (19.Nd5?? Nd5 20.Bg4 Ne6–+) 19...hg6 20.Rac1 Rfe8 21.Bc3 b6 22.Nc6 Bc7 23.Bd4 Qd6 24.g3 Nh5 (24...Qe6 25.Kg2 Bd6 26.g4+=) 25.Bh5 gh5 26.Bc5 bc5 27.Qc2 c4 28.Qd1 h4 (28...Qg6!? 29.Qe2 Re6=) 29.Qg4+/– hg3 30.f4 (better is 30.fg3!? Bb6 31.Qf4+/–) 30...ef3 31.Rf3 (31.Rf3 f6 Combination; 31.Qf3 Qe6 Combination) 31...g2 32.Qg2 Bb6 (32...Re6 33.Kh1=) 33.Rcf1+= Rc7 34.Rg3 g6 35.Rg5 d4 (35...Re4 36.Qg3 Qg3 37.Rg3=) 36.Rd5+= Qa3 37.ed4 Qa4 38.Kh1 Qc2 39.Ne5 Bd4?? (better is 39...c3 40.dc3 Rc3 (40...Qc3 41.Ng6 Qh3 42.Qh3 Bd4 43.Ne7 Kf8 44.Rd4 Rc6 45.Qh7 Rh6 46.Qh6 Ke7 47.Re1) 41.Qc2 Rc2 42.Nf7 Ree2 43.Nh6 Kh8=) 40.Rd4+– Re5 (40...c3+–) 41.Rd8 (41.Qa8 Kh7 42.Rh4 Rh5 43.Rh5 gh5 44.Rg1+–) 41...Kg7 42.b6 Rcc5 43.b7 Rb5 44.b8Q Rb8 45.Rb8 Rf5 46.Rbb1 a4 47.Rbc1 Rf1 48.Rf1 a3 (48...Qd3+–) 49.Qf3 f5 (49...Qd2 50.Qf7 Kh6 51.Qf8 Kh5 52.Qh8 Qh6 53.Qd4+–) 50.Qc3 (50.Qc3 Qc3 51.dc3+–) 1–0. Jonsson,Pall G (1830) – Gonzalez Gonzalez,A (2120), Reykjavik Open, 2015.

7.cd5 cd5 8.d3 Bg4 9.Be2 Be2 10.Nge2 =.

7.f4 0–0 8.Qc2 Be6 (8...a5 9.b5+=) 9.Nge2 (9.cd5 cd5 10.Nb5 Ne8=) 9...a5 (9...dc4 10.Ng3 a5 11.Nce4 ab4 12.Nf6 gf6 13.ab4 Ra1 14.Ba1+=) 10.c5+= ab4 11.ab4 Ra1 12.Ba1 Bc7 (12...Be7 13.Nd4+=) 13.Nd4= White plans b5 13...Ng4 (13...Qe7 14.Be2=) 14.g3 (14.Ne6 fe6 15.b5 Nd7=) 14...Bd7 15.h3 Nf6 16.b5 Qe7 17.b6 Bd8 18.Nd1 Nh5 19.Rg1 f5 20.Nf2 Nf6 21.g4 fg4 22.hg4 Bc8 23.f5 Rf7 24.Nh3 Nfd7 25.Ne6 Qh4 26.Nf2 h6 (26...Bf6!? 27.Bf6 Qf6=) 27.Rh1+/– Qe7 28.Ne4 (better is 28.Qc3!?+/–) 28...de4= 29.Bc4 Na6 Pawn c5, live or die! 30.Qe4 (30.g5 Ndc5 31.Nd8 Qd8 32.g6 (worse is 32.Bf7 Kf7 33.Qc4 Qd5 34.Qd5 cd5=) 32...Nd3 33.Bd3 Qd3 34.gf7 Kf7 35.Qb2+–) 30...Nf8 (better is 30...Ndc5!? 31.Nc5 Nc5+=) 31.Qd4 Ne6 32.fe6 Be6 33.Be6 Qe6 34.Qd8 Rf8 35.Qd4 Threatening mate: Qxg7 35...Qf7 36.Kd1 (36.g5 Qf2 37.Kd1 Qf3 38.Kc2 Qf5 39.e4 Qc5 40.Qc5 Nc5 41.gh6 gh6 42.Rh6 Ne4 43.Rh8 Kf7 44.Rh7 Ke6 45.Rb7+/–) 36...Nc5!–/+ 37.Qc5? (better is 37.Rh6 Nb3 38.Qg7 Qg7 39.Bg7 Kg7 40.Rh5–/+) 37...Qf3–+ Theme: Double Attack 38.Kc2 Qe4 (38...Qh1?! 39.Qe5 Rf7 40.Qe8 Rf8 41.Qe5+=) 39.Kb3 (39.d3 Qh1 40.Qc4 Kh7–+) 39...Qh1 40.Bg7 (40.Qd4 Qd1 41.Kb4 Qb1 42.Bb2 Qg6–+) 40...Qd1 41.Kc4 Kg7 (better is 41...Qa4 42.Kd3 Kg7 43.Qe5 Rf6 44.Qe7 Rf7 45.Qe5 Kh7–+) 42.Qe7 Rf7 43.Qe5 Rf6 (better is 43...Kf8!? 44.Qb8 Ke7 45.Qb7 Kf6 46.Qc6 Kg7–/+) ½–½. Rudbeck,Joergen – Bendig,Frank, corr ICCF TT–4–90, 1992.

7.f4 d4 8.ed4 Bf4 9.d3+=.

6.Nc3 Be6

7.Qb3 a6 8.cd5 Bd5 (8...cd5!? 9.Qc2 Nbd7+=) 9.Nd5+= Nd5 10.Bc4 (10.d3 ed3 11.Qd3 a5+=) 10...b5= 11.Be2 f6 (11...a5 12.Qc2 ab4 13.Qe4 Qe7 14.Qe7 Ke7 15.ab4 Ra1 16.Ba1=) 12.a4 (12.Qc2 Qe7+=) 12...Nc7 (12...Nb4!? 13.ab5 Qd5 14.Qd5 cd5=) 13.ab5 cb5 14.Nh3 Qd5 15.Qd5 Nd5 16.Bb5 Kd8 (16...ab5 17.Ra5 Double attack (17.Ra8 Pinning; 17.Ra8 Deflection; 17.Ra5 Decoy)) 17.0–0 Bb4 1–0. Braeutigam,Torben (1665) – Kudera,Julian, Schleswig Holstein–ch U16 VMB, 2004. (=1.a3 d5 2.b4 Nf6 3.e3 e5 4.Bb2 e4 5.c4 c6)

7.cd5 cd5

8.Bb5 Nc6 9.Nge2 a6 (9...Bd6 10.d3=) 10.Bc6 bc6 11.Rc1 (11.Nd4 Bd7=) 11...a5 (11...c5 12.Qa4 Bd7 13.Qb3+=) 12.Nd4 (12.b5 Rb8 13.Nd4 Bd7 14.bc6 Rb2 15.cd7 Qd7= (worse is 15...Nd7 16.Qa4+/–; 15...Kd7 16.Qa4 Kd6 17.Ne4 de4 18.Rc6 Kd7 19.Rc5 Ke7 20.Nc6 Kd7 21.Nd8 Kd8 22.Qa5 Ke8 23.Rc8 Kd7 24.Qf5 Kd6 25.Rd8 Ke7 26.Rd4+–)) 12...ab4 13.Nc6 Qb6 14.Nb4 Bb4 15.ab4 Qb4 16.Rb1 Bg4 (16...0–0 17.0–0+=) 17.Nd5= Bd1? (17...Nd5 18.Qg4 Deflection (18.Qg4 Overloading)) 18.Nb4+/– Bh5 (18...Bb3 19.f3 Nd5 20.0–0 ef3 21.Rf3+–) 19.Bf6+– gf6 20.Nd5 Bg6 (better is 20...Kd8+–) 21.Nc7 Ke7 22.Na8 Ra8 23.Ke2 Bh5 24.f3 Rg8 25.Kf2 ef3 (25...Rd8 26.Rhd1+–) 26.gf3 Rd8 (26...Rc8 27.Rb7 Kd6 28.Rhb1+–) 27.Rb2 (27.Rb7 Ke6 28.d4 Bg6+–) 27...Rd5 (27...Rd3 28.Rhb1+–) 28.Rc1 (28.Ra1 Rd7+–) 28...Rf5 (28...f5 29.Rc7 Kf6 30.Rb6 Kg5 31.Kg3+–) 29.f4 Rd5 (29...Bg6 30.Rc6+–) 30.Rc3 (30.e4 Rd7+–) 30...Kf8 (30...Bg6 31.Rb7 Ke6 32.Rc6 Rd6 33.Rd6 Kd6 34.Rb6 Ke7 35.Rb4+–) 31.e4 Rd4 32.Ke3 Ra4 (32...Rd7 33.Rc8 Ke7 34.h3+–) 33.Rc1 (33.Rb8 Kg7+–) 33...Bg6 (33...f5 34.Rb8 Kg7 35.Rg1 Kf6 36.e5 Ke6+–) 34.f5 Bh5 35.Rg1 (35.Rb8 Ke7 36.Rh8 Ra3 37.Rc3 Rc3 38.dc3 Bd1 39.Rh7 Kf8+–) 35...Ra3 (35...Ra8 36.d3 Ra7 37.Rb8 Ke7 38.h3+–) 36.d3 Ke7 (36...Ra8 37.Rbg2 Ra7 38.Rg3+–) 37.Rg7 Ra1 (37...h6 38.Rh7 Ra7 39.Rh6+–) 38.Rh7 Bd1 39.Rb7 Kd6 40.Rbf7 Ra2 (40...Ra3 41.Rf6 Kc5 42.Rc7 Kb5 43.e5+–) 41.Rf6 Ke5 42.Re6 1–0. Barbarickiy,Yuri (1970) – Shardakov,Miroslav, Salekhard Russia, City Championship, 2015.

8.Bb5 Nc6 9.Nge2 Bd6 10.Na4+=.

8.Bb5 Nc6 9.Nge2 Bd6 10.d3 0–0 11.de4=.

8.Bb5 Nc6 9.Nge2 Bd6 10.Nd4 Bd7 11.Nce2 (11.Nc6+=) 11...Nd4 12.Nd4 0–0 13.0–0 a6 14.Bd7 Qd7 15.Ne2 Be7 16.Qb3 Rad8 17.Rad1 Qb5 18.Nd4 Qd7 19.Rfe1 Rfe8 20.Ne2 b5 21.h3 Qd6 22.Rc1 Nd7 23.Nd4 ½–½. Fernandez Russo – Luzuriaga,Norberto Horacio, corr, 1985.

8.Bb5 Nbd7 9.d3= a6 10.Ba4 Bg4 (10...b5 11.Bc2 ed3 12.Bd3=) 11.Qd2 (11.Nge2 ed3 12.Qd3 b5+=) 11...b5 12.Bc2 Nb6 13.Nge2 Rc8 (13...ed3 14.Bd3 Nc4 15.Qc2=) 14.h3+= Bh5 15.Ng3 (15.Nf4!?+=) 15...Bg6+= 16.0–0 (worse is 16.de4 Nc4 17.Qc1 Qc7–+) 16...Qc7 (16...ed3 17.Bd3 Nc4 18.Bc4 dc4 19.Rad1 Qd2 20.Rd2=) 17.Rac1= (17.de4? Nc4 18.Nd5 Nd5 19.Qd5 Rd8–+) 17...Qd7 (17...Qb7 18.Rfd1=) 18.Nce2 (better is 18.Rfd1+=) 18...Bd6 (better is 18...Rc2 19.Qc2 ed3=) 19.Bf6+/– gf6 20.de4 Bg3 21.Ng3 0–0 (21...de4 22.Qd7 Kd7 23.Be4 (23.Ne4?! Rc2 24.Rc2 Be4+=) 23...Rc1 24.Rc1+–) 22.Qd4 (22.Rfd1 Qc7+–) 22...Qd6? (better is 22...Qd8+–) 23.Bb3 Rc1 24.Rc1 Rd8 (24...Qe5 25.Qe5 fe5 26.ed5+–) 25.Rd1 (better is 25.ed5!? Nc8+–) 25...Qc6 (25...Rc8 26.ed5 Kg7 27.Ne2+–) 26.ed5 (26.ed5 Qd6 27.h4+–) 1–0. Feofanov,Alexander – Silchenko,Stepan, Omsk CC Championship SF, 2010.

8.Bb5 Nbd7 9.d3 a6 10.Bd7 Qd7 11.Na4=.

8.d3 Nbd7 9.de4 de4 10.Qd4 Qb6 11.Nb5 Rc8 12.Rc1 Rc1 13.Bc1 a6 14.Qb6 Nb6 15.Nc7 Kd7 16.Ne6 Ke6 17.Nh3 Bd6 18.Be2 Rc8 19.Bb2 h6 20.f3 g5 21.Nf2 ef3 22.gf3 Nfd5 23.Kd2? (23.Bd4 Nc4 24.Bc4 Rc4=) 23...f5 (23...Ne3!? 24.Ke3 Bf4 25.Kd3 Rd8 26.Kc3 Be5 27.Kb3 Bb2–/+) 24.h4 f4 25.Bd4 (25.e4 Ne3 26.Bd4 Rc2 27.Kd3+=) 25...Nc4 (better is 25...fe3 26.Be3 Ne3 27.Ke3 Nd5 28.Kd2 Bf4 29.Ke1 Rc1 30.Nd1 gh4–+) 26.Bc4+= Rc4 27.hg5 hg5 28.Kd3 Rc7? (better is 28...Ne3!? 29.Ne4 Rc6+=) 29.Rh6 Kd7 30.e4 Nb4 (better is 30...Ne3+–) 31.ab4 Bb4 32.Rh7 (better is 32.Ng4!? Bf8 33.Rh7 Kc6 34.Ne5 Kd6 35.Nf7 Rf7 36.Rf7 Be7+–) 32...Be7 33.Bf6 Ke6 34.Re7 Re7 35.Be7 Ke7 36.Kd4 b5 37.Kc5 Ke6 38.Nd3 g4 (38...Kf7 39.Kb6+–) 39.Nf4 Ke5 40.Nd3 Ke6 41.fg4 Kf6 (41...b4 42.Kb4 Kf6 43.e5 Ke6 44.Ka5+–) 42.e5 (better is 42.Kd6 Kg5 43.e5+–) 42...Ke6 43.Kb4 Kd5 44.g5 1–0. combijack (1830) – cornishman (1750), gameknot.com, 2011.

8.d3 Nbd7 9.de4 de4 10.Qd4 Qb6 11.Rd1+=.

6.Nc3 Be7

7.Qb3 0–0 8.d3 ed3 9.Bd3 dc4 10.Bc4 b5 11.Be2 Be6 12.Qc2 a5 13.ba5 Qa5 14.a4 b4–+ 15.Nb1 Rd8 (15...b3 16.Qd2 Bb4–+ 17.Bc3 Nd5 18.Bb4 Nb4–+) 16.Nd2?? (better is 16.Qc1–/+ b3 17.Kf1 c5 18.Nf3 Nc6–/+) 16...b3–+ 17.Qc1 Rd2! 18.Bc3 (18.Qd2 Bb4) 18...Re2! 19.Ke2? (19.Ke2 Qg5; 19.Ne2 Bb4) 19...Bb4 (19...Qd5 20.f3–+) 20.Bb4 Qb4 21.Qd2 Bc4 22.Kd1 Qd2 23.Kd2 Ne4 24.Ke1 Nc3 (24...Nc3 25.Nf3 b2–+) 0–1. Kerlein,M – Korn,Thomas, Filseck op 1st, 1997.

7.Rc1 0–0 8.cd5 cd5 9.Nge2 Nc6 10.Nf4 (10.Qb3 a5 11.b5 a4+=) 10...a6 (10...d4 11.Na4+=) 11.d3= b5 (11...g5 12.Nh5=) 12.de4 (12.Qb3!? ed3 13.Bd3+/–) 12...de4+= 13.Qd8 Rd8 (worse is 13...Bd8 14.Ne4 Ne4 15.Bd3 Nf2 16.Kf2+/–) 14.Ne4 Ne4 15.Rc6 Nf2 16.Kf2 Rd2 17.Kg3 Rb2 18.Bd3 g5 (18...Bd7 19.Rb6+=) 19.Nd5= Bf8 (19...Bd8=) 20.Rc2 (20.h4!? h6 21.hg5+=) 20...Bd6 (20...Rc2 21.Bc2 Be6 22.Rd1+=) 21.Kf3 Rc2 22.Bc2 Bb7 23.Be4 Kg7 24.Nc3 Be4 25.Ne4 Be7 26.Rc1 f5 27.Nc5 (27.Ng3 Kf6+=) 27...Bf6 (27...g4!? 28.Kg3 a5=) 28.Ne6+= Kg6 29.Rc6 Kf7 30.Rb6 Bb2 (30...h5 31.e4 g4 32.Ke3 fe4 33.Ke4+=) 31.Nc5 (better is 31.Ng5!? Ke7 32.Ne6+/–) 31...Ba3 32.Na6 Ra7 33.h4 gh4 34.Nb8 Bb4 35.Nc6 Ba5?? (better is 35...Ra4=) 36.Rb5+– Ra6 37.Na5 (37.Ra5?! Rc6 38.Rf5 Kg6=) 37...Kg6 (37...Rh6 38.Rf5 Ke8 39.Re5 Kf7 40.Kg4+–) 38.Nc4 (38.Nb3 h5+–) 38...Kg5 (38...Kf6 39.Kf4 Ra4 40.Rf5 Kg7 41.Rc5+–) 39.e4 Ra1 40.Rf5 (40.ef5?! Rf1 41.Ke3 Rf5 42.Rf5 Kf5+–) 40...Kg6 41.Ne5 Kg7 42.Rf7 (42.Kf4 Ra2 43.Rg5 Kf6+–) 42...Kg8 43.Rf4 Rf1 (43...Ra3 44.Kg4+–) 44.Ke3 Re1 45.Kf2 Rh1 46.Rf3 Ra1 47.Rh3 Ra2 48.Kf3 1–0. Menouar,Elhadi – Mokhebi,Kamel, 3rd President ALG Open, 2015.

7.d3 a5 8.b5 0–0 9.bc6 bc6 10.Qc2 =.

7.d3 a5 8.de4 ab4 9.ab4 Ra1 10.Ba1 Bb4 11.ed5 cd5 12.Qb3 –/+.

7.cd5 0–0 =.

7.cd5 cd5 8.d3 0–0 9.de4 de4 10.Qc2 =.

7.Nge2 Bg4 8.h3+= Be6 9.Nd4 Bd7 (9...0–0!?+=) 10.Be2+/– 0–0 11.0–0 Ne8 (11...dc4!? 12.Qc2 Na6 13.Ne4 Ne4 14.Qe4 b5+/–) 12.cd5 cd5 (12...Nf6 13.Qb3+–) 13.Nd5 f5? (better is 13...Nc6+–) 14.Nf4 Bf6 (14...Nc7 15.b5 Kh8+–) 15.Bc4 Kh8 (15...Rf7 16.Bf7 Kf7 17.Qb3 Ke7+–) 16.Qh5 h6 17.Ng6 Kh7 18.Nf8 Kh8 19.Qg6 1–0. psychobishop – darafsh, gameknot.com, 2011.

7.d3 0–0

8.cd5 cd5 9.de4 de4 =.

8.de4 de4 9.Qc2 a5 10.Rd1 Qe8 11.b5= (11.Ne4? Ne4 12.Bd3 f5–+).

8.de4 de4 9.Qc2 Re8 10.Nge2 (10.Rd1 Bd6=) 10...Bf5 (10...Qd3!? 11.Nd4 Qc2 12.Nc2 b6=) 11.Ng3+= e4 becomes the focus of attention 11...Bg6 12.Rd1 (12.Nge4 Ne4 13.Rd1 Bd6–/+; 12.Nce4 Ne4 13.Rd1 Bd6 14.Ne4 Be4–/+ (14...Re4?! 15.Qc3 f6 16.c5=)) 12...Nbd7 13.Be2 (13.c5 Bf8+=) 13...a5= 14.b5 (14.Nce4 Ne4 15.Rd7 Qd7 16.Ne4 Be4–+; 14.Nge4 Ne4 15.Rd7 Qd7–+) 14...Qc7 15.0–0 (15.Nce4 Ne4 16.Ne4 Be4–+; 15.Nge4 Ne4 16.Ne4 Be4–+) 15...Nc5 (15...Rad8 16.Rd2=) 16.Na4 (16.bc6 Qc6 17.Nd5 Nd5 18.cd5 Qd6+=) 16...Nfd7 (16...Nd3 17.Bf6 (worse is 17.Bd3 ed3 18.Qd2 cb5 19.cb5 Qc2+=) 17...Bf6 18.Qb3= (worse is 18.Bd3 ed3 19.Qd2 cb5 20.cb5 Rad8+=)) 17.Nh5 (17.Nc5 Nc5 18.Qc3 Bf6=) 17...Na4 (17...Ne6 18.Nc3=) 18.Qa4 Nc5 19.Qc2 Ne6 (19...Bh5 20.Bh5 Nd3 21.bc6 bc6 22.f3 Nb2 23.Qb2+=) 20.Rd2 (20.Ng3 Rad8=) 20...Rad8 21.Rfd1 Rd2 22.Rd2 Bd6 (22...Rc8 23.Qa4=) 23.Ng3 Nc5 (23...Rd8 24.Bg4=) 24.Bd4 (24.b6 Qe7+=) 24...b6 25.Qb2 Bf8 (25...f6 26.bc6 Qc6 27.Qb5 Qb5 28.cb5=) 26.Bg4 (26.bc6 Qc6 27.Qb5 Qb5 28.cb5 Nb3–/+) 26...Nd3= 27.Qb3 c5 28.Ba1 Rd8 (28...Bd6 29.Qc3 Be5 30.Rd3 Bc3 31.Rc3–+) 29.Qc3 Qe7 30.Bf5 (30.Nf5 Qg5 31.Rd3 ed3=) 30...f6 (30...Bf5 31.Nf5 Qg5+=) 31.h4 (better is 31.Bg6 hg6 32.f3+=) 31...Re8?? (better is 31...Bf5 32.Nf5 Qe6–/+) 32.Bg6+/– hg6 33.Ne4 Qe4 34.Qd3 (34.Rd3?! Qh4 35.Rd7 Be7+=) 34...Qh4 (34...Qd3 35.Rd3 Re4 36.Rd7+/–) 35.Qd5 Kh7 36.g3 (36.Qc6 Qe4+/–) 36...Qh3 (36...Qh5 37.Qf7 Ra8 38.Bf6+–) 37.Qh1 (37.Bf6 Re3 38.fe3 Qg3 39.Rg2 Qe3 40.Kf1 Qc1 41.Ke2 Qc2 42.Kf3 Qb3 43.Kg4+–) 37...Qh1+= 38.Kh1 Re4 39.Rc2 (39.Rd8 Rc4 40.Bf6 gf6 41.Rf8 f5=) 39...g5 40.Kg2 Kg6 41.Kf3 Kf5 42.Ke2 g4 43.Rc1 g6 44.Bb2 Be7 45.a4 Ke6 46.Kd3 f5 (46...Kf5 47.Rd1=) 47.Rh1+= Bf6 48.Bc1 (48.Bf6 Kf6 49.Rh8 Re6=) 48...Ba1 (48...Be5 49.Rh6 Kf6 50.Rh8=) 49.Ba3 (49.Rh6 Kf6=) 49...Bf6 (49...Bg7 50.Rh7 Bf6 51.Rc7+=) 50.Rh7 Be7 (50...g5 51.Rb7 Bd8 52.Bb2=) 51.Rg7 (51.Rh6 Bf6+=) 51...Bf6 (51...g5 52.Bb2 Kd6 53.Rg6 Re6 54.Re6 Ke6 55.e4+=) 52.Rg6+= Kf7 53.Rh6 Re6 (53...Re7 54.Bc1+=) 54.Rh7 Kg6 55.Rc7 (55.Rd7 Kg5+=) 55...Rd6 56.Kc2 Be5 57.Bc1 Rd2 (57...Kf6 58.Rh7+=) 58.Bd2 Bc7 59.Kd3 Kf6 60.e4 (60.Bc3 Ke6+/–) 60...Ke6 (60...Be5 61.Bf4+/–) 61.Bf4 (61.Bg5 Be5+/–) 61...Bd8 62.Ke3 (62.ef5 Kf5 63.Bd6 Ke6+/–) 62...Kf6 (62...Bf6 63.f3 Bd4 64.Ke2 fe4 65.fe4+/–) 63.f3+– gf3 64.Kf3 Ke6 (64...fe4 65.Ke4 Be7 66.Bc7+–) 65.ef5 Kf5 66.g4 The passed pawn on g4 will quickly become a dangerous weapon 66...Ke6 67.Ke4 Kd7 68.Kd5 Bf6 69.g5 Bg7 (69...Bd8 70.g6 Ke8 71.Ke6+–) 70.Be5 (70.Be5 Bf8 71.g6+–) 1–0. Wolf,Heinz – Horn,Hans Markus, Verbandsliga Nord Baden, 1994.

8.de4 de4 9.Qc2 Bf5 10.Nge2 Bd6 11.c5 (11.Nd4 Qc8+=) 11...Bc7 (11...Be5 12.Rd1 Qe7 13.Nd4=) 12.Nd4 (12.Rd1 Qe7+=) 12...Bg6= 13.Rd1 Qe7 14.Be2 Re8 (14...a5 15.Rd2=) 15.Nb3 (15.h4 h5=) 15...Nbd7 16.Nd2 Rad8 (16...Red8 17.0–0=) 17.Nc4 Nh5 (better is 17...Ne5!? 18.Ne5 Be5= (worse is 18...Qe5 19.Nd5 Qd5 20.Bf6 Qd1 21.Bd1 gf6 22.Qa4+/–)) 18.Nd6+/– Bd6 19.Rd6 (19.cd6 Qh4+=) 19...f5 (19...Ne5!? 20.Rd8 Qd8+=) 20.0–0+/– Ne5 21.Rfd1 Rd6 22.Rd6 (better is 22.cd6 Qd7 23.Qa4+/–) 22...Rd8? (better is 22...f4!?+=) 23.Ne4! fe4 (23...Re8 24.Be5 Qe5 25.Ng5+–) 24.Rd8 (24.Be5 Rd6 25.Bd6 Qf6+–) 24...Qd8 25.Be5 Nf6 26.Bc4 Kh8 27.h3 (27.Qa4 a6+–) 27...h5 (27...b5 28.cb6 ab6 29.Qc3+–) 28.Bd4 (28.Qa4 a6+–) 28...Kh7 29.Bb3 (29.Qa4 Qb8+–) 29...Kh6 (29...Nd5 30.Bd5 Qd5 31.Qa4+–) 30.Qb2 (30.Be6 Kh7+–) 30...Bf5 (30...Qe7 31.Qa2+–) 31.Bc2 (31.Bc4 b5 32.cb6 ab6+–) 31...Qe7 32.f3 (32.b5 Nd5+–) 32...Kg6 (32...Bg6 33.Bf6 gf6 34.fe4+–) 33.g4 hg4 34.hg4 Bd7 (34...Be6 35.Bf6 Qf6 36.Be4 Kf7 37.Qf6 gf6 38.Kf2+–) 35.Bf6 gf6 (35...Qf6 36.Be4 Kf7 37.Qf6 gf6 38.Bf5+–) 36.Be4 f5 (36...Kf7 37.Qh2+–) 37.gf5 Bf5 38.Bf5 Kf5 39.Qd4 Qg5 (39...Kg5 40.e4+–) 40.Qg4 (better is 40.Kf2 Qh5 41.Qf4 Ke6 42.Qg4 Qg4 43.fg4+–) 40...Qg4 41.fg4 Kg4 42.Kf2 b6 (42...Kf5+–) 43.cb6 ab6 44.a4 Kf5 45.a5 (45.a5 ba5 46.ba5+–) 1–0. Sternik,Ryszard – Wantoch_Rekowski,Jacek, corr 2AMM Poland, 1994.

8.de4 de4 9.Qc2 Bf5 10.Nge2 Bd6 11.Ng3 Bg3 12.hg3 Bg6 13.Be2 Re8 14.0–0 Nbd7 15.Na4 Qc7 16.Rad1 h5 (16...Red8 17.Rd2=) 17.Qc3 b6 18.Rd2 Re7 19.Rfd1 Nf8 20.Qc1 N6d7 21.Nc3 Nf6 22.Rd6 Ne8 23.R6d2 Nf6 24.Rd6 Ne8 25.R6d4 Nf6 26.Qd2 (26.b5 Rd7+=) 26...N8d7 (26...Ne6 27.Rd6 Ne8 28.Rd7 Rd7 29.Qd7=) 27.b5 c5 (27...Ne5 28.bc6 Qc6 29.Rd6+=) 28.Rd6 Rae8 29.Rc6 Qb8 30.Rd6 Ne5 (30...Qc7 31.g4 hg4 32.Rc6+=) 31.Rd8 Qb7 32.Re8 Re8 33.Nd5 Nd5 34.Qd5 (34.Be5!? Re5 35.cd5+=) 34...Qd5= 35.Rd5 (worse is 35.cd5 Nd3 36.Bd3 ed3–/+) 35...Nd3 36.Bc3 a6 37.a4 ab5 38.cb5 f6 39.Rd6 (worse is 39.Bh5 Bh5 40.Rh5 Ra8–/+) 39...Rb8 40.f3 c4 (40...Nc1!? 41.Bd1 Kf8+=) 41.fe4 Ra8 (41...Be4 42.Rd4 Bf5 43.Rc4+/–) 42.Bd1 (42.e5!? Ra4 43.ef6 (43.Rb6?! Ra3 44.Bd4 fe5 45.Rg6 ed4 46.ed4 Ra1 47.Bf1 Rb1+=) 43...gf6 44.Rf6+–) 42...Nc5+= (worse is 42...Be4 43.Rb6 Kh7 44.Re6+/–) 43.Bd4 Na4 44.e5 fe5 45.Be5 Be8 46.Bf3 (46.Ba4 Ra4 47.Rb6 Ra5=) 46...Rc8+= 47.Bd5 Kh7 (47...Bf7 48.e4 Bd5 49.ed5–/+) 48.Be4 Kg8 49.Bd5 (49.g4 hg4 50.Bd5 Bf7+=) 49...Kh7 (better is 49...Bf7!? 50.Rc6 Rc6 51.Bf7 Kf7 52.bc6 Ke6–/+) 50.Be6+= Rc5 51.Bd4 Rc7 52.Rd8 (worse is 52.Bb6 Nb6 53.Rb6 Rc5+=) 52...c3 (better is 52...Bf7!? 53.Bf7 Rf7+=) 53.Re8+– c2?? (better is 53...Kg6 54.Bb3 c2 55.Re6 Kh7 56.Bc2 Rc2+–) 54.Bf5 Kh6 55.Re6 Kg5 56.Bc2! Rc2 (56...Rc2 57.e4 Passed pawn) 57.Bg7 (better is 57.e4 Rc3 58.Bc3 Nc3 59.Rb6+–) 57...Rc1 58.Kh2 Rb1 (58...Kf5 59.Rf6 Kg5 60.Rd6+–) 59.e4 h4 60.Bf6 Kg4 61.gh4 Rb5 62.Be7 Rb3 (62...Nc5 63.Re5 Ra5 64.h5+–) 63.Rg6 Kh5 64.Rg7 Rb2 65.Bf6 Re2 66.e5 Nc5 67.Rh7 (67.Kg3 Rd2+–) 67...Kg4 68.h5 Ne6 (68...Ne4+–) 69.h6 Nd4 (69...Kh5 70.Re7 Nf8+–) 70.Rg7 Kf4 71.Bg5 Kf5 72.h7 Nf3 73.Kg3 Ng5 74.Rg5! (74.Rg5 Kg5 75.h8Q Re3 76.Kf2+–) 1–0. Valenta,Vit (2210) – Bakalar,Jan (2110), SVK–ch op–A Banska Stiavnica, 2007.

8.de4 de4 9.Qd8 Rd8 10.Nge2 a5 11.ba5 Nbd7 =+.

6.cd5 cd5

7.Bb5 Nc6 8.Nc3 a6 9.Ba4 b5 10.Bb3 Bd6 11.Nd5= Ne5 12.Nf4 0–0 13.d4 Neg4 14.Nge2+= Nf2? 15.Kf2+– Ng4 16.Kg1 Ne3 17.Qe1 Qg5 18.Qf2 Ng4 19.Qg3+– Qd8 20.Qc3 Re8 21.Rf1 Bc7?? 22.Bf7! Kf7 23.Nd5 Nf6 24.Nc7 Be6 25.Na8 Bd5 26.Qc7 Qc7 27.Nc7 Rd8 28.Nd5 Rd5 29.Rf6! gf6 30.Kf2 Rf5 31.Ke3 Kg6 32.Rc1 Kg5 33.Rc5 Kg6 34.Rf5 Kf5 35.Ng3 Ke6 36.Ne4 f5 37.Nc5 Kd5 38.Na6 h5 39.Nc7 Kc6 40.Nb5! Kb5 41.Kf4 h4 +–. thedesertfox (2170) – winston (1910), net–chess.com, 2004.

7.Bb5 Nc6 8.Nc3 Bd6 9.Nge2 0–0 10.0–0 Bh2 11.Kh1?? (11.Kh2 Decoy theme: h2 11...Ng4) 11...Bc7 12.Nf4 (12.d3 Ng4 13.g3 Qf6–/+) 12...Qd6 (12...Nd4 13.Rc1–+) 13.g3 (13.d3 g5 14.Ba4 a6 (14...gf4 15.Nb5 Qe7 16.Bf6 Qf6 17.Nc7 Qh4 18.Kg1–+) 15.de4 gf4 16.Nd5 Nd5 17.ed5 Qh6 18.Kg1 f3–+) 13...Ne5 (13...Bg4 14.Be2 Be2 15.Qe2–+) 14.Be2 a6 15.Kg2 (15.d3 Rd8–/+) 15...Ng6 (15...Nc4 16.Bc1 Qc6 17.d3 ed3 18.Nd3–+) 16.Rh1 (better is 16.Ng6!? fg6 17.d3–/+) 16...Nf4 17.gf4 d4 18.Na2 (18.Na4 Nd5–+) 18...d3 19.Qc1 (better is 19.Bh5–+) 19...de2 20.Be5 Qd7 21.Bf6 Qg4 (21...gf6 22.f3 Rd8 23.Rg1–+) 22.Kh2 Bf4! (22...gf6 23.Rg1 Bd6 24.Nc3+=) 23.ef4 Qf4 A double attack (23...gf6? 24.Rg1+–) 24.Kg1 Qf6 25.Rh2 Bg4 26.Qc3 Rfd8 (26...Rfd8 27.Qf6 gf6–+) 0–1. Hoffmann,Piotr – Garbacki,Michal, corr 1AMM Poland, 1992.

7.Bb5 Bd7 8.Qe2 a6 9.Bd7 Nbd7 10.Nh3 Bd6 11.d3 0–0 12.de4 de4 13.Nc3 Ne5 14.Ng5?? Nd3–+ 15.Kf1 Nb2 16.Qb2 Be5 17.Qb3 Qd3 (17...Qd3 18.Kg1 Bc3–+) 0–1. mgriffin (1815) – amikhlin (2055), net–chess.com, 2001.

7.Bb5 Nbd7 8.Ne2 a6 9.Bd7 Bd7 (worse is 9...Kd7 10.d3+=) 10.0–0 Bd6 11.d3 Bh2! 12.Kh2 Ng4 13.Kg1 Qh4 14.Re1?? (better is 14.Be5 Ne5 15.Nf4–+) 14...Qh2 (better is 14...Qf2 15.Kh1 Ne3–+) 15.Kf1 Qh1 16.Ng1 Nh2 17.Ke2 Bg4 18.Nf3 Qg2 (18...Bf3 19.gf3 Qf3 20.Kd2 Qf2 21.Re2 Nf3 22.Kc1 Rc8 23.Nc3=) 19.Kd2 Qf2 (better is 19...Nf3 20.Kc1 Ne5 21.Qd2 Nd3 22.Kc2 Ne1 23.Qe1–+) 20.Kc1 Rc8 (worse is 20...ef3 21.Nd2 Qh4 22.Bg7–+) 21.Nc3 Nf3 22.Rf1 (22.Re2 Qg3 23.de4–+) 22...Qe3 23.Kb1 Be6 (23...Be6 24.Bc1 Qd3 25.Qd3 ed3 26.Rf3 Rc3–+) 0–1. Zaichenko,Andrey (1800) – Denchev,Stanimir (1635), FICGS, 2007.

7.Nc3 Bd6 8.Bb5 Nc6 9.Nge2 0–0 10.Rc1 Bd7 11.Na4 (better is 11.d3!? Be5 12.de4 de4 13.f4 ef3 14.gf3+=) 11...Nb4-/+ 12.ab4 Bb5 13.Nc5 b6 14.Nb7 Qd7 15.Nd6 Ba4 (15...Ba4 16.Ne4 de4–+; 15...Qd6?! 16.Bf6 Be2 17.Qe2 Qf6 18.b5-/+) 0–1. Fournier,Frederic – Mephisto Mondial, Match Thematique, 2000.

7.Nc3 Be6 8.Bb5 Nc6 9.Ba4 a6 10.Bb3 g6 11.Nge2 Bg7= 12.0–0 0–0 13.Rc1 Rc8 14.d3 Ne5 15.de4 de4 16.Qd8 Rfd8= 17.Be6 fe6 18.Nf4? Nd3–/+ 19.Nd3 Rd3?? 20.Na4 Rc1=+ 21.Bc1 Nd5 22.Nc5+= Rc3 23.Nb7 Rc2 24.Nc5 Nc3–/+ 25.a4 0–1. mgriffin (1655) – flskipper, net–chess.com, 2001.

7.Nc3 Be6 8.Bb5 Nc6 9.Nge2 Bd6 10.Qa4 Bd7 11.Bc6 Bc6 12.b5 Bd7 13.Qb3 Be6 14.Nd4 0–0 15.Ne6 fe6 16.0–0 Qc7 17.g3 Rf7 18.Rac1 Qb8 19.Ne2 h5 20.Nd4 Ng4 21.Ne6+/– Qe8 22.Ng7+– Rg7 23.Bg7 Kg7 24.Qd5 Qg6?? 25.Qb7 Kh6 26.Qa8 Be5 27.Rc6 Bf6 28.Qf8 Kh7 29.Rc7 Bg7 30.Rfc1 h4 31.R1c6 Qg5 32.Rg7 Qg7 33.Qg7 Kg7 34.Rc7 Kf6 35.Ra7 hg3 36.hg3 Ke5 37.b6 Kd6 38.a4 Kc6 39.a5 Nf6 40.b7 Kc7 41.a6 Nd7 42.Ra8 Kb6 43.g4 Kc5 44.b8Q Nb8 45.Rb8 Kc6 46.a7 Kc5 47.a8Q Kc4 48.Rd8 Kb3 49.Qc6 Kb4 50.Rb8 Ka3 51.Qa6 (51.Qa8) 1–0. mgriffin – kingcapturer, net–chess.com, 2001.

7.Nc3 Be6 8.Nge2 Be7 9.Nf4 0–0 10.Ne6 fe6 11.Bb5 a6 12.Ba4 b5 13.Bb3 Nc6 14.0–0 Bd6 15.Rc1 Ne5–/+ 16.Ba1 Nd3 17.Rc2 Qb8 18.h3 Qb6 19.Ne2 Bc7 20.Nd4 Qd6 21.Rc6?? Qh2. mgriffin (1615) – nhoj, net–chess.com, 2001.

7.d3 a5 8.ba5 Qa5 9.Bc3 Qb6 10.Ne2 Be7 11.de4 =.

7.d3 a5 8.b5 Nbd7 9.Nc3 Be7 10.de4 de4 11.Nd5 =.

7.d3 a5 8.de4 ab4 9.Bb5 Nc6 10.e5 Ne4 11.Ne2 Bc5 12.0–0 0–0 13.ab4 Ra1 14.Ba1 Bb4 15.Nf4 The isolani on d5 becomes a target 15...Be6 16.Bb2 Qb6 17.Bd3 Nc5 18.Be2 Qa5 19.Bg4 (19.Nd5? Rd8 20.Nbc3 Bc3 21.Bc3 Qa2 (21...Rd5? 22.Ba5 Rd1 23.Rd1+–) 22.Ne7 Kf8–+) 19...Re8 20.Bf3 The pressure on the isolated pawn grows (worse is 20.Nd5 Rd8 21.Be6 fe6 22.Nf6 gf6 23.Qg4 Kf8 24.ef6 Qc7-/+; 20.Ne6?! fe6 21.Bd4 Qd8=) 20...Rc8 21.Qe2 Ne4 (21...Qa2 22.Rc1=) 22.g3 (22.Nd5!? Qd5 23.Rd1+=) 22...Qa2 23.Ne6 fe6 24.Bg4 Re8 25.Rc1 Kf7 26.Kg2 g6 27.Bd4 Ra8 28.Qc2 Be7 29.Be2 Nd4 30.ed4 Bg5 31.f4 Bd8 32.Bd3 Qc2 33.Rc2 Ra4 34.Be4 de4 35.Rb2 g5 36.Kf2 Rd4 37.Ke3 Ra4 38.Nd2 Attacks the isolani on e4 38...b6 39.Ne4 ½–½. Benassi,Aspasio (2130) – Janosi,Ervin (2120), RA–2011–0–00165, 2011.

7.d3 a5 8.de4 (8.ba5 Qa5 9.Bc3 Qb6 10.Ne2 Be7 11.de4=; 8.b5 Nbd7 9.Nc3 Be7 10.de4 de4 11.Nd5=) 8...Ne4 9.b5 a4 10.Nf3 Qa5 11.Nbd2 +=.

7.d3 Bd7 8.de4 de4 9.Ne2 (9.Nd2 Bc6=) 9...Be7 (9...a5 10.ba5 Qa5 11.Bc3=) 10.Ng3 (10.Qc2 0–0=) 10...0–0 (10...a5 11.b5+=) 11.Nc3+= a5 (11...Re8 12.Qc2+=) 12.Nge4 (12.Nce4 Re8+=) 12...Ne4 (12...ab4 13.Nf6 Bf6 14.ab4 Ra1 15.Qa1+=) 13.Ne4+/– ab4 14.Qd4 f6 15.ab4 Ra1 16.Ba1 Nc6 (16...Bc6 17.Nc5 b6 18.Nd3+=) 17.Qc4 Kh8 18.Bc3 Qa8 (18...Bf5 19.Nc5+=) 19.b5 (19.Nc5 Bf5+/–) 19...Ne5+= 20.Qb3 Bf5 21.Be5 (21.Nd2 b6+=) 21...Be4 (21...fe5 22.Bd3=) 22.Bc3+= b6 23.Rg1 (23.Qe6 Bb4 24.Bb4 Qa1 25.Ke2 Qb2 26.Bd2 Qb5 27.Ke1 Qb1 28.Ke2 Rd8+=) 23...Rc8 24.Kd2 (24.f3 Bd5 25.Qb2 Qa4+=) 24...Bd5 25.Qb2 Ba3 26.Qb1 Ba2!? 27.Qf5 (27.Qa2 Bc1) 27...Bc1 (27...Bc1 28.Kc1 Rc3 29.Kd2 Rc5 30.Qc5 bc5–+) 0–1. Moedl,Willi (2200) – Bonetti,Shane (2110), Orangutan Cup, Final, 2005.

7.d3 Bg4 8.Be2 (8.Qc2 Nbd7 9.de4 Ne4 10.Nf3 a5 11.Bd3=) 8...Be2 9.Ne2 Nbd7 10.0–0 Qc7 11.de4 +=.

7.Ne2 Bg4 8.h3 Bh5 9.Qa4 Qd7 10.Qb3 Be7 11.Nf4 Bg6 12.Nc3 d5 seems the pivot of the position 12...0–0 13.Ncd5 Nd5 14.Qd5 Rd8 15.Bc4 Kh8? (15...Qc7 16.Be5 Qb6 17.Ng6 Qg6 18.Qb7+/–) 16.Ng6 fg6 17.Rd1?? (better is 17.Qd7 Nd7 18.f3+–) 17...Qd5–+ 18.Bd5 Rd5 19.0–0 Nd7 20.f4? (20.f3!?–/+) 20...Bf6 21.Bc1? (21.d4–+) 21...a5 22.g4 ab4 23.ab4 Ra4 24.g5 Be7 25.Bb2 Bb4 (25...Rb4?! 26.Ba3 Rd3 27.Ra1–+) 26.Bd4 Kg8 27.d3 ed3 28.Rd3 Bc5 29.Rfd1 Kf7 30.Kf2 Bd4 31.ed4 h6 32.h4 b5 33.Ke3 Nb6 34.Rc1 Ke6 35.Ke4 Kd6 (35...Nc4!? 36.Rg1 Nd6 37.Kf3–+) 36.Rc2? (better is 36.gh6 Nd7 37.hg7 Nf6 38.Kf3–+) 36...hg5 37.hg5 Rf5 38.Rh2 (38.Rdc3 Nc4–+) 38...Nd5 39.Rh4 b4 40.Rf3 Nc3 41.Kd3 Nd5 42.Kc4?? (42.Ke4 Ra3 43.Ra3 ba3 44.Rh8–+) 42...Nb6–+ 43.Kd3 Ra3 44.Ke2 Rf3 45.Kf3 Nd5 0–1. combijack (1820) – waynemo (1770), gameknot.com, 2011.

7.d3 Bd6

8.Nd2!+= 0–0?! 9.de4 Ne4 10.Ne4 de4 11.Qd4+/–.

8.Nd2 0–0 9.de4 Bg4 10.f3+–.

8.Nd2!+= a6?! 9.de4 de4 10.Bf6 (idea Ne4+/–).

8.Nd2 Nbd7 9.de4 de4 10.Bb5 Be7 11.Qb1+=.

8.Nd2 Bf5 9.de4 Be4 10.Ne4 de4 11.Bb5 Nc6 12.Rc1 Rc8 13.Bc6 bc6 (13...Rc6 14.Rc6 bc6 15.Qc2+=) 14.Qa4 Qe7 15.Rc6 Threatening mate... how?. 15...0–0 16.Rc8 (16.Ne2 Ng4+=) 16...Rc8 17.Ne2 h6 (17...Nd5 18.Bd4+=) 18.Bf6= Qf6 19.0–0 Qe7 20.Nd4 Be5 21.Nc6 (21.Rd1 Qc7 22.h3 Rd8+/–) 21...Bh2= 22.Kh2 Decoy theme: h2 22...Qd6 23.Kg1 Qc6 24.Qa7 The passed pawn on b4 will quickly become a dangerous weapon 24...Ra8 25.Qe7 Ra3 26.b5 ½–½. Borrmann,Fritz – Gross,Wilhelm, corr SOK–90–56, 1990.

8.de4 de4 9.Bb5 Nc6 10.Qc2=.

8.de4 de4 9.Nd2 Bf5 10.Qa4 Bd7 11.Qc2+=.

8.de4 de4 9.Nd2 Bf5 10.Nc4 Bc7 11.Qd8 Kd8 12.Ne2 (12.Bf6 gf6 13.Ne2 Nd7+=) 12...Ke7 13.Nd4 Bd7 14.Be2 (14.b5 Rd8+=) 14...Nc6 (14...Rc8 15.b5+=) 15.Nb5 Bb8 16.Rd1 Rd8 17.0–0 (17.Bf6 Kf6 18.Nbd6 Bf5+/–) 17...Be6 (17...Nb4 18.Bf6 gf6 19.Rd7 Rd7 20.ab4+=) 18.Rd8 Nd8 (worse is 18...Kd8 19.Bf6 gf6 20.Ncd6+/–) 19.Nd4 (19.Rd1 Ne8+=) 19...Bd7 20.Rc1 (20.f3 ef3 21.Nf3 Be6+=) 20...Nc6 (20...h6 21.f3+=) 21.Nb3 (21.Nc6 Bc6 22.Na5 Bd5+/–) 21...Bc7 (21...Bf5!?+=) 22.Nc5+/– Rc8?? (better is 22...Bf5+/–) 23.Bf6+– (23.Nd7?! Nd7 24.b5 Nd8 25.Bg7 Be5+/–) 23...gf6 24.Nd7 b5 (24...f5 25.Nc5 Nd8 26.Rd1+–) 25.Nd2 Nb4 26.ab4 Bh2 27.Kh2 Rc1 28.Bb5 a6 29.Ba4 Ra1 (29...f5 30.Nc5+–) 30.Nb6 (30.Nc5 f5+–) 30...f5 31.Bb3 (31.Nb3 Ra2+–) 31...Rc1 (31...a5 32.ba5 Ra5 33.Nd5 Ke6 34.Nc3 Ke7 35.f3+–) 32.Kg3 Re1 (32...Kf6 33.f3 Rc6 34.Nd5 Ke5 35.Nf4+–) 33.Bc4 Ra1 (33...Rd1 34.Nb3+–) 34.Nb3 Rb1 35.Nd4 Kd6 (35...Kf8 36.Nd5 Ra1 37.f3+–) 36.Nf5 Kc6 37.Nd5 Rb2 38.Nf6 Rb4 39.Nd4 Kb7 40.Bf7 a5 (40...h6 41.Kf4+–) 41.Bd5 Ka6 42.Be4 (42.Nh7 a4 43.Nf6 a3+–) 42...h6 43.Nd7 a4 44.Bd3 Kb7 45.Nc2 (45.Nc2 Rb3 46.Nc5 Kc7 47.Nd4 Rd3 48.Nd3+–) 1–0. Brzoza,Miroslaw – Szczesiak,Zenon, corr 2AMM Poland, 1994.

8.de4 de4 9.Nd2 Bg4? (better is 9...Bf5+=) 10.Bf6+– Bd1 (10...Qf6 11.Ne4 Bd1 12.Nf6 gf6 13.Rd1 Be5+–) 11.Bd8 0–0 (11...Ba4 12.Bh4 f5+–) 12.Ne4 (12.Rd1 Rd8 13.Ne4 Bc7+–) 12...Rd8 13.Rd1 Be7 14.Rd8 Bd8 15.Nf3 Nc6 (15...a5 16.b5+–) 16.Bc4 Bc7 17.Ke2 Re8 18.Nc5 b6 19.Na6 Bf4 (19...Bd6 20.Bb5 Rc8 21.Rd1+–) 20.Bb5 Re6 21.Rd1 h6 22.Bc6 1–0. pcmvr (2530) – grazianol (2020), net–chess.com, 2006.

7.d3 Nbd7

8.Qb3 Bd6 9.Nc3 Nb6 10.Nb5 0–0 11.Nd6 =.

8.Qc2 a5 9.ba5 Qa5 10.Bc3 Qc7 11.de4 =.

8.Nc3 a5 9.b5 Be7 10.Qc2 ed3 11.Bd3 +=.

8.Nd2 Be7 9.de4 de4 10.Qc2 a5 11.Ne4 =.

8.de4 de4 9.Qc2 =.

8.de4 de4 9.Nd2 a5 10.Qa4 +=.

8.de4 de4 9.Nd2 Be7 10.g4 0–0 11.g5 +=.

8.de4 de4 9.Nd2 Be7 10.g4 h6 11.Nh3 (11.Bg2 Qb6+=) 11...Nb6= 12.g5 hg5 13.Ng5 Bf5 14.h4 Qd5 15.Bd4 Rc8 16.Bg2 Pawn e4, live or die! 16...Nc4 17.Rc1 b5 (17...Na3? 18.Rc8 Bc8 19.Qc1+–) 18.h5 Nd2 19.Rc8 Bc8 20.Bf6 Bf6 (20...gf6 21.Ne4 Qd3 22.Nd2 Qa3 23.Bc6 Kf8 24.Bb5 Bb4 25.Be2+=) 21.Ne4 Ke7 22.Qd2 Bb7 23.Rg1 Qd2 24.Kd2 Be4 25.Be4 Rh5 26.Rc1 Rh2 27.Ke2 Kd6 28.Rc2 g6 29.Kf1 Bd8 30.Rd2 Kc7 31.Bf3 Be7 32.Rc2 Kb8 33.Bc6 a5 34.ba5 Ba3 35.Bd5 f5 36.Rc6 Rh4 37.Rg6 Bb4 (37...Ra4!?+/–) 38.Rg7 Ba5 39.Rb7 Kc8 40.Rb5 Bc7 41.Be6 Kd8 42.Rf5 Re4 43.Bd5 Re5 44.Re5 Be5 45.Ke2 Ke7 46.Bh1 Kf6 47.f4 Bc7 48.Kf3 Bb6 49.Kf2 Bc7 50.Bb7 Bb6 51.Bd5 Bc7 52.Kf3 Bb6 53.Bb7 Bc5 54.Bc8 Bb6 55.Bg4 Bc5 56.e4 Bd6 57.Bd7 Bc7 58.Bb5 Bd6 59.Kg3 ½–½. Woelfelschneider,Peter – Fischer, 2002.

7.d3 Be7

8.Nd2 0–0 9.Rc1 a5 10.de4 Ne4 11.b5 =.

8.de4 de4

9.Bb5 Nc6 10.Nc3 Qd1 11.Rd1= 0–0 12.Nge2 Ne5 13.0–0?? Be6?? 14.Ng3 Nc4= 15.Bc1 Nd6=+ 16.Be2 Rac8 17.Bb2 Bc4 18.Rc1 Be2 19.Nce2= Nc4 20.Bf6 Bf6= 21.Nc3 Na3 22.Nce4 Bb2 23.Rc8 Rc8 24.Rd1 Kf8 25.Nf5 Rc1 26.Rc1 Bc1 27.Nfd6 b5 28.Kf1 a6 29.Ke2 Nc4 30.Kd3 Ne5 31.Kc2+/– Ba3 32.Kb3 Bc1 33.h3 Nc6 34.g4 g6 35.Nc5 a5 36.ba5+– Na5 37.Kb4 Nc6 38.Kb5 Ne5 39.Nc4 Nc4 40.Kc4 Bd2 41.Kd3 Bb4 42.Ne4 Be7 43.f4 h6 44.Kd4 f5? 45.gf5+– gf5 46.Ng3 1–0. wlittle (2185) – ghorn (2015), net–chess.com, 2004.

9.Nc3 0–0= 10.Nge2 (10.Qc2 Bf5=) 10...Bf5 (10...a5 11.b5 Nbd7 12.Nd4=) 11.Nd4 Bd7 (11...Bg6 12.Rc1=) 12.Qc2 Re8 (12...Qc7 13.g3+=) 13.Bc4= (13.Ne4? Ne4 14.Bd3 Nf6–+) 13...Bd6 (13...Nc6 14.Nc6 (14.Ne4? Ne4 15.Bd5 Nf6 16.Bc6 bc6–+) 14...Bc6 15.Rd1+=) 14.Rd1 White is in command 14...Qe7 15.0–0 (15.Nd5 Nd5 16.Bd5 a5+=) 15...Qe5 Do you see the mate threat? 16.g3 Qe7 (16...Bh3 17.Rfe1 Qh5 18.Qb3=) 17.Nd5+= Nd5 18.Bd5 Bg4 (18...a5 19.b5 Bg4 20.f3 ef3 21.Nf5 Bf5 22.Qf5+–) 19.Rd2+/– Na6 (19...a6!?+/–) 20.Qc3 White threatens Nf5 20...Qd7 (better is 20...Be5!? 21.Be4 Rad8+/–) 21.Nf3! The mate threat is Qxg7 21...Bf8 (21...Bf3 22.Qg7 The nicest combinations are those leading to mate) 22.Ne5 (22.Ng5 Rac8 23.Qd4 Re7 24.Be4 h6 25.Qd7 Rd7 26.Rd7 Bd7+–) 22...Re5 23.Qe5 Bf3 (23...Nc7 24.Rc1 Nd5 25.Rd5+–) 24.Qf4 (24.Be4 Qd2 25.Bf3 Qd7+–) 24...Rc8 25.Be5 Re8 (25...Nc7 26.Be4 (26.Bb7? Qh3 27.Qf3 ef3 28.Bf3 Qf5–+) 26...Qd2 27.Qf3+–) 26.Bc4 Threatening mate... how? 26...Qe7 27.Bd6 Qf6 28.Qf6 gf6 29.Ba6 (29.Bf8 Kf8 30.Rc1 Re7+–) 29...ba6 30.Bf8 Kf8 31.Rc1 Re7 (31...a5 32.b5 Rb8 33.a4+–) 32.Rd6 (32.Rd8 Kg7+–) 32...a5 33.ba5 Kg7 (33...f5 34.h3+–) 34.h3 (34.a6 h6+–) 34...Re5 35.a6 Ra5 36.Rc7 Ra3?! (36...f5+–) 37.g4 (37.Ra7?? Ra1 38.Rd1 Rd1 39.Kh2 Rh1) 37...h5 (37...Ra1 38.Kh2 Kg6 39.Kg3+– (worse is 39.Ra7 h5 40.Kg3 hg4+–)) 38.gh5 (38.Ra7 Ra1 39.Kh2 h4 40.Rf7 Kf7 41.Rd7 Ke6 42.Re7 Ke7 43.g5 Rh1) 38...Ra5 39.Kh2 (39.Ra7?! Rg5 40.Kf1 Rc5 41.h6 Kg6=) 39...Rg5 40.h4 (40.Ra7?! Rg2 41.Kh1 Rg3 42.Kh2 Rg2 43.Kh1 Rg3 44.Kh2 Rg2=) 40...Rg2 (40...Rh5 41.Kg3 (41.Ra7?! Rh4 42.Kg3 Rg4 43.Kh3 Rg5=) 41...Ra5 42.Ra7+–) 41.Kh3 Rg1 42.Rdd7 (42.Ra7?! Rh1 43.Kg3 Rg1 44.Kf4 Rg4 45.Kf5 Rh4 46.Rf7 Kf7 47.Rd7 Kg8+–) 42...Bh5 43.Kh2 (43.Ra7 Rh1 44.Kg3 Bf3+–) 43...Rg4 44.Ra7 Rh4 45.Kg3 Rg4 46.Kh3 Rg5 47.Kh4 Ra5 (47...Kg6 48.Rf7 Kf5+–) 48.Re7 (better is 48.Rac7 Kg6 49.Rf7 Ra6 50.Rg7 Kh6 51.Rh7 Kg6 52.Rcg7 Kf5 53.Rh5 Ke6+–) 48...Be2 (better is 48...Bf3 49.Rf7 Kg6 50.Rg7 Kf5+–) 49.Re4 Ra6 50.Ra6 Ba6 51.Re8 (51.Rd4 Bc8+–) 51...Be2 (51...Kg6 52.Kg3+–) 52.Kg3 Bc4 (52...f5 53.Kf4+–) 53.Kf4 Be6 54.Ke4 (54.e4 Kg6+–) 54...Kg6 55.Rg8 Kh6 56.Kd4 Bf5 (56...Kh5 57.e4+–) 57.Kd5 (57.e4 Bd7+–) 57...Bg6 (57...Be6 58.Kd6+–) 58.Kd6 (58.f4 f5+–) 58...Kg5 (58...Kh7 59.Rd8 Bc2+–) 59.Ke7 f5 (59...Kf5 60.Rd8 Kg4 61.Rd4 Kg5 62.f4 Kg4 63.Kf6+–) 60.f4 (60.f4 Kh6 61.Kf6+–) 1–0. Plonka,T – Glogowski,Z, corr Otrocki mem 3th, 1999.

9.Nd2 0–0 10.Bc4 Bg4 11.Qc2 Nc6 (11...Re8 12.Rc1+= (12.Ne4 Ne4 13.Bf7 Kf7 14.Qe4 Bf6–/+)) 12.h3 Bh5 13.Ne2 Rc8 14.Ng3 Increases the pressure on e4 (14.Rc1 Nb4 15.ab4 Be2 16.Ke2 b5 17.Bf6 Bf6 18.Bf7 Kf7 19.Qe4 g6+/–) 14...Bg6 15.Rd1 (15.Nde4 Nb4 16.ab4 Bb4 17.Kf1 Ne4 18.Ne4 b5 19.Bf7 Rf7–+ (19...Kf7?! 20.Qb3 Rc4 21.Rd1–+; 19...Bf7?! 20.Qb1–+); 15.Nge4 Nb4 16.ab4 Ne4 17.Ne4 Bb4 18.Kf1 b5–+) 15...Qc7 16.Qb1 (16.Rc1 Bd6 17.Bf6 Bg3=) 16...Rfe8 (16...Ne5 17.Rc1 Qb8 18.h4=) 17.Qa1 (better is 17.0–0+=) 17...Bb4?? (better is 17...a6=) 18.ab4+– Nb4 19.0–0 (19.Qa4 Nfd5 20.0–0 Nd3 21.Bd3 ed3+–) 19...a6? (19...Nc2 20.Qa4 Ne3 21.fe3 Qg3 22.Qa7 Bh5 23.Bf6 gf6+–) 20.Bf6+– gf6 21.Qf6 Re6?? (21...Qe7 22.Qf4 Nd3 23.Bd3 ed3+–) 22.Be6 (22.Be6 fe6 23.Qe6 Kh8 24.Nde4+–) 1–0. GuestSTMY – gediminasb, freechess.org, 2017.

9.Qd8 Bd8

10.Bc4 0–0 11.Nc3 Nc6 12.Rc1 Ne5 13.Ne4 Ne4 (better is 13...Nc4!? 14.Rc4 b5 15.Nf6 Bf6+=) 14.Be5+– Bf6 15.Bf6 Nf6 16.Nf3 Bg4 17.Ke2 Rac8 18.h3 Bh5 19.Rhd1 Ne4 20.a4 Rfd8 21.Rd8 Rd8 22.Bd5 Nf6 23.Bb7 h6 24.b5 Rb8 25.Bc6 Kh7 26.a5 Ng8 (26...Bg6+–) 27.b6! ab6 28.a6 Ne7 29.Bb7 1–0. b4_player – manne, casual, 2013.

10.Bc4 Nbd7 11.Nd2 =.

10.Bc4 Bf5 11.Ne2+= 0–0 12.Ng3 Bg6 13.Nd2 a6 14.Rd1 +/–.

10.Bc4 Bf5 (10...Nbd7 11.Nd2=) 11.Ne2+= 0–0 (11...Nc6 12.Nd2+=) 12.Ng3 Bg6 13.Nd2 Nc6 (13...a6 14.Rd1+/–) 14.h4 h5 15.Rc1 (15.b5 Nb8+=) 15...Re8 16.Bb5 (16.0–0 Rc8+=) 16...Rc8 17.Bc6 Rc6 18.Rc6 bc6 19.Ne2 (19.Nc4 Bc7=) 19...Bf5 (19...Nd5 20.Nc4 Bb6 21.Bd4=) 20.Bd4 (20.Nc4 Be7=) 20...a6 21.Nc4 Bc7 22.Bf6 gf6 23.Nd4 Be6 24.Ne6 fe6 25.Ke2 f5 26.Rc1 Rc8 27.Rd1 (27.g3 Rd8+=) 27...Rf8 (27...Rd8 28.Rd8 Bd8 29.g3+=) 28.Rd7 (28.Rd4 e5 29.Rd2 Rf7+=) 28...Rf7 29.Rd2 Rf8 30.Rd1 (30.g3 Kg7+/–) 30...Kg7 (30...Rd8 31.Rd8 Bd8 32.g3+=) 31.Nd2 (31.g3 Kf6+=) 31...e5 32.Nb3 Bb6 33.Rc1 White gets the initiative 33...Rc8 34.Nc5 Bc5 35.Rc5 Kf6 36.Ra5 Ra8 37.a4 Rb8 (37...Ke6 38.b5 Kd6 39.bc6+/–) 38.Ra6 Rb4 39.Rc6 Ke7 40.Rh6 (40.a5!?+/–) 40...Ra4+= 41.g3 Ra1 42.Rh5 Ke6 43.Rh6 Ke7 44.Rg6 Kf7 45.h5 ½–½. Macchiagodena,Maurizio – De Smet,Karl, corr ICCF TT–4–90 SF, 1995.

10.Bc4 Bf5 11.Ne2 0–0 12.Ng3 Bg6 13.Nd2 Nbd7 14.0–0 Bc7 15.Rac1 Bg3 16.hg3 Rac8 17.Bb3 b5 18.Bd4 a6 19.Rfd1 Rfd8 20.Rc8 White fights for the Initiative 20...Rc8 21.Ba1 Kf8 22.Bd4 Ng4 (22...Bf5 23.f3=) 23.Bd5+= Bh5 (23...Ngf6 24.Bb7 Rb8 25.Ba6 Bh5+/–) 24.f3+/– (24.Ne4?! Ne3 25.Bb7 A) worse is 25...Nd1 26.Bc8 Bg6 27.Nc5 Nc5 28.Bc5 (28.bc5?! Ke7+–) 28...Kg8 29.Bd4+/–; B) 25...Rc7=; 24.Be4 Nf2 25.Bb7 Rc7+= (worse is 25...Nd1 26.Bc8 Nb8 27.Ba7+=; 25...Bd1?? 26.Bc8 Nd3 27.Bd7+–)) 24...ef3 25.gf3 Nge5 26.g4 Bg6 27.Bb7 Rc2 28.Nb3 (worse is 28.Ba6 Rd2 29.Rd2 Nf3 30.Kg2 Nd2 31.Bb5 Nf6 32.Bf6 gf6–/+) 28...h5 (28...f6 29.Nc5 Nc5 30.bc5+= (30.Bc5?! Kf7+–)) 29.Nc5+/– hg4 30.f4 g3? (better is 30...Nf3 31.Bf3 Nc5 32.Bc5 Rc5 33.bc5 gf3+/–) 31.fe5+– Bf5 (31...Bh5 32.Nd7 Ke8 33.Rd3 Kd7 34.e4+–) 32.e6 (32.Ba6 Bg4 33.Ra1 Bh3+–) 32...Nf6 (32...Be6 33.Ba6 (33.Na6?! Bg4 34.Ra1 Bf5+–) 33...Bg4 34.Ra1+–) 33.Bf6 (33.Ba6 Bg4 34.Bf6 gf6 35.Rd8 Ke7 36.Rd7 Kf8 37.Rf7 Kg8 38.Rf6 Be2+–) 33...gf6 34.Rd8 Ke7 35.Rd7 Ke8 (35...Kf8 36.Rf7 Kg8 37.Rf6+– (37.Ba6 Bh3 38.Nd3 Rd2 39.Rf8 Kf8 40.e7 Ke7 41.Nf2 gf2 42.Kh2 f1Q 43.Kg3 Qg2 44.Kf4 Qg4)) 36.ef7 (36.ef7 Kf8 37.Rc7+–) 1–0. Bendig,Frank – Nebe,Lutz, corr SOK–88–27, 1989.

10.Bc4 Bf5 11.Ne2+= Nc6 12.Nd2 +=.

10.Nd2 Nbd7 11.Rc1 +=.

7.Bf6 Qf6=+

8.Nc3 White launches an attack 8...Qe5 (8...Be6!?=) 9.d4 Qd6 10.Nge2 Nd7 (10...a5 11.Nf4 ab4 12.ab4 Ra1 13.Qa1+/–) 11.Qb3 (11.Rc1 a6 12.Qa4 Rb8+/–) 11...Nf6 12.Nf4 d5 seems the pivot of the position 12...a6 (12...Be6!?+=) 13.Nfd5+/– Nd5 14.Qd5 Qd5 15.Nd5 Bd6 16.Nb6 (16.Rc1 Rb8+/–) 16...Rb8 17.Bc4 0–0 (17...Bf5 18.Rc1+/–) 18.0–0 Bf5 19.Rac1 Rfd8 (19...Bc7 20.Na4+–) 20.Bd5 (20.f3 ef3 21.Rf3 Bg6+–) 20...Kf8 (20...Bg6+–) 21.f3 ef3 22.Rf3 (22.gf3?! Bh3 23.Rfd1 Be7+–; 22.Bf3?! Be6+/–) 22...Bg6 23.Bf7! Bf7 A pinning theme (23...Be4 24.Rff1 Ke7 25.Bb3+–) 24.Rcf1 Kg8 25.Rf7 Re8 (25...Rf8 26.Rf8 Rf8 27.Rf8 Kf8 28.Nd7 Ke7 29.Nc5+–) 26.Nd5 (26.Rd7 Rbd8 27.Rb7 Re3+–) 26...h6 (26...Rbd8 27.Rb7 Bh2 28.Kh2 Rd5 29.Rff7+–) 27.Rd7 Bf8 28.Rff7 b5 (28...Rbd8 29.Kf2+–) 29.Kf2 Rbc8 (29...Rbd8 30.Kf3+–) 30.Nc7 (30.Nc7 Red8 31.e4+–) 1–0. Trigance,Eric – Randisi,Stephane, corr CDE–Jub50 prelG, 1997.

8.Nc3 Be6

9.Qa4 Bd7 10.Qb3 Be6 11.Rc1 Be7? 12.Nd5+/– Qe5 13.Bc4 Nc6 14.Ne7 Ke7 15.b5 Nd8 16.Ne2 Rc8 17.0–0 b6 18.Ng3 Nb7 19.Be6 Qe6 20.Qa4 Na5 21.Qb4 Kd7 22.Qd4 Ke7 23.Qg7 Rcg8?? 24.Rc7 Kd8 25.Qc3 h5 26.Ra7 Qd5 27.Qc7 Ke8 1–0. zorrik (1735) – whitestone (1720), gameknot.com, 2003.

9.Bb5 Nc6 10.Nge2 a6 11.Qa4 Rc8–/+ 12.Bc6 Rc6 13.Nd4 b5 14.Qa5 Rd6 15.a4 ba4 16.b5 Qd8 17.Ra4 Qa5 18.Ra5 ab5 19.Ncb5 Rb6 20.0–0 Kd7 21.Ra7= Kd8 22.Rc1 Bd7 23.Ra8 Ke7 24.Rc7 g6? 25.Raa7 (25.Raa7 Kf6 26.Rd7+–) 1–0. Psion – Psion, 4 Min/Zug, 1989.

9.Bb5 Nc6 10.Nge2 Bd6=+.

9.Bb5 Nc6 10.Qa4 Bd7= 11.Nge2 Qd6 (11...Qf5 12.Nd4 Nd4 13.ed4=) 12.0–0 (12.Nf4 Rc8=) 12...a6 13.Bc6 Bc6 14.b5 Bd7 15.Nf4 Be7 (15...Qe5!?=) 16.Nfd5+= f5 17.f3 ef3 18.Rf3 (18.Ne7 Qd2 19.Rf3 Qc3–+) 18...0–0 19.Ne7 (19.Qd4 Be6+/–) 19...Qe7 20.Qc4 (20.Qd4 ab5 21.Nb5 Bc6+/–) 20...Be6 21.Qe2 Rfd8 22.ba6 ba6 23.Rf4 (23.e4 Qa7 24.Kh1 fe4 25.Qe4 Re8+/–) 23...Qc5 (23...Rab8 24.Rb4 Qd6 25.Rab1 Rb4 26.ab4+/– (worse is 26.Rb4 Qd2 27.Qd2 Rd2+=)) 24.a4 Qc6 (24...Qd6 25.Rd1+=) 25.Qe1 (25.Rb1 Rac8+/–) 25...Rab8+= 26.e4 (26.Rf2 Rb2+=) 26...g6 (26...Qd6 27.Rf2+=) 27.ef5+/– Bf5 (27...Qb6 28.d4 Rd4 29.a5=) 28.g4 (28.d4 Qc4+/–) 28...Be6 (28...Bd3 29.Qe3+=) 29.Ne4 (29.Qe5 Qd7+=) 29...Rd3 (29...Qc7 30.Qe3 Rb3 31.Nc3+=) 30.Nf6 Kh8 31.Qe5 The mate threat is Nd5 31...Qd6 32.Qd6 Rd6 33.Re4 (33.Re1 g5 34.Rf2 Rb2+/–) 33...Bb3 (33...Bf7 34.g5 Rd2 35.Re7+=) 34.g5 Rd2 35.Re7 Do you see the mate threat? 35...Bg8 36.Ra7 (36.Ne4 Re2 37.Kf1 Bc4–+) 36...Rd6 (36...Rbb2 37.Ra8 Rg2 38.Kf1 Rbf2 39.Ke1 Rf6 40.gf6 Rg1 41.Kd2 Ra1 42.f7 Ra2 43.Kc3 Ra3 44.Kb4 Rb3 45.Ka5 Rb8 46.Rb8 Kg7 47.f8Q Kh8 48.Qg8) 37.Rc1+/– h5 38.Kf1 Rbd8 (38...Rd2 39.a5+= (39.Ra6?? Bc4 40.Kg1 Ba6–+; 39.Ng8 Rbb2=)) 39.Rcc7 The mate threat is Rh7 39...Rd1 40.Kf2?? (better is 40.Ke2 R8d2 41.Ke3 Rd3 42.Kf4 Rd4 43.Ke5 Rd5 44.Nd5 Rd5 45.Kf6 Rd6 46.Ke7 Re6 47.Kf8+–) 40...R8d2+= 41.Ke3 Do you see the mate threat? 41...Rd3 42.Kf4 Rd4 43.Ke5 Rd8 (43...Rd5 44.Nd5 Rd5 45.Kf6 Rd6 46.Ke7 Re6 47.Kf8 Re5+–) 44.Rh7! Bh7 45.Rh7 1–0. Gross,Wilhelm – Psion, 1Min/Zug, 1993.

9.Bb5 Nd7 10.Nge2 Qg5 11.Nf4 a6 12.Bd7 Bd7 13.h4 Qd8 14.Nfd5 Bc6 (14...Rc8!?+=) 15.Qh5+/– 1–0. marekt – matty722, ChessWorld.net, 2013. (=1.c4 Nf6 2.b4 e5 3.a3 d5 4.e3 c6 5.Bb2 e4 6.cd5 cd5 7.Bf6 Qf6 8.Nc3 Be6)

9.Nb5 Na6 10.Rc1 Be7 11.Nc7 (11.d3 0–0=) 11...Nc7+= 12.Rc7 0–0 13.Rb7 a5 14.ba5 Ra5 15.a4 Rfa8 16.Bb5 Bd6 (16...Bd8!? 17.Be8 Kf8–+) 17.Ne2+= Bc8 (17...Be5 18.Rb6+=) 18.Rb6= Qd8 (18...Bg4 19.h3 Be2 20.Qe2=) 19.Rc6 Bb7 (19...Ba6 20.Ba6 R8a6 21.Ra6 Ra6 22.0–0=) 20.Rc1 Ba3 (20...Qg5 21.0–0=) 21.Rc2 (21.Rb1 Bd6=) 21...Bd6 (21...Ba6 22.Nd4=) 22.0–0 (22.Nd4 Qf6=) 22...Qh4 (22...Qb8 23.h3=) 23.Ng3+= Bc8 (23...Ba6 24.Rc6 Bg3 25.fg3+=) 24.d3 Bg4 (24...Ba6 25.de4 Bg3 26.hg3 Qe4 27.Rc5+/–) 25.Qd2+/– Bg3 (25...Bf5 26.de4 Be4 27.Rc6 Bg3 28.hg3+–) 26.hg3 Qe7 27.de4 (27.Bc6 Ra4 28.Rb2 Ra1 29.Ba8 Ra8+–) 27...de4 28.Rfc1 (28.Bc6 Ra4 29.Ba4 Ra4+–) 28...R5a7 29.Qc3 (29.Qd5 Rd8 30.Qc5 Qc5 31.Rc5 Kf8+/–) 29...Rd8 (29...Bd7 30.Qd4 Bb5 31.ab5+/–) 30.a5 (30.Qc5!?+/–) 30...Qg5 31.Qb4 Rb7 (31...Be6 32.Rc5 Qe7 33.Bc6+/–) 32.Rc5 Qe7 (32...Qg6 33.Qd4 Rbb8 34.Qe5+–) 33.a6 (33.Qc3 Bd7 34.Bc4 Re8+/–) 33...Rbb8 (33...Rc7 34.Qc3 Ra7 35.Qe5+–) 34.Qa5 (better is 34.Qc4 Rd2 35.Qc3+–) 34...Rd1?? (34...Rd6 35.Bc6 Qa7 36.Rd5 (36.Be4?! Qa6 37.Qa6 Ra6+/–) 36...Rd5 37.Bd5+– (37.Qd5?! Qa6 38.Qe4 Rc8+/–)) 35.Kh2 (better is 35.Rd1 Bd1 36.Bc6+–) 35...Rc1+/– 36.Rc1 h6? (36...Qg5 37.a7 Ra8 38.Qb6+–) 37.a7 (better is 37.Bc6 Qf8+–) 37...Ra8 38.Rc7 Qe5 39.Rb7 (39.Qb6 Qh5 40.Kg1 Qe5+–) 39...Qh5 (39...Kh7 40.Qb4 Rc8+–) 40.Kg1 Qe5 41.Qb6 (better is 41.Qc7 Qa1 42.Kh2 Bc8+–) 41...Qa1 42.Kh2 Qa2 (42...Kh7 43.Bc6 f5 44.Rg7 Qg7 45.Ba8 h5+–) 43.Rb8 Kh7 44.Ra8 Bf3 45.Rh8! Kh8 Decoy to h8 46.Qd8 Kh7 47.a8Q Qf2 Threatening mate: Qxg2 48.Qg8 Kg6 49.Qa6 f6 50.Be8 Kf5 (50...Kg5 51.Qg7 Kf5 52.Qaf6) 51.Qd5 Kg4 52.Bh5 1–0. Gross,Wilhelm – Psion, 1996.

9.Nb5 Qe7 10.Nd4=.

9.Rc1 Nc6=.

6.cd5 Nd5

7.Nc3 a5 8.ba5 Nf6 9.Qb1 Bf5 10.Nf3 =.

7.d3 Bf5 8.de4 Be4 9.Nc3 Nc3 10.Qd8 Kd8 11.Bc3 +=.

7.d3 Nf6 8.Nc3 Bg4 9.Qc2 ed3 10.Bd3 =.

7.d3 Qh4 =.

6.Bf6 Qf6=+

7.Nc3 a5 8.b5 dc4 9.Bc4 Qg6 10.g3 =.

7.Nc3 Be6 8.cd5 cd5 9.Nb5 Na6 10.Rc1 Qd8 (10...Be7 11.Nd4 Bd7 12.Qh5=) 11.Nd4+= Bd7 (11...Nc7 12.Ne6 Ne6 13.Qa4 Ke7 14.d3+=) 12.Qh5 g5 (12...Nc7 13.Qe5 Ne6 14.Qd5 Nd4 15.Qd4+=) 13.Ba6 (13.h4 Nc7+/–) 13...ba6+= 14.Nge2 (14.h4 a5 15.hg5+=) 14...Qf6? (better is 14...a5!? 15.Nf4 ab4=) 15.Nc3 Bd6 16.Nd5 Qe5 17.Nc3 0–0? (better is 17...a5!? 18.f4 gf4 19.Qe5 Be5 20.Ne4 ab4 21.ab4 fe3 22.de3 a5 23.ba5 Ra5+/–) 18.h4+– g4 19.Qe5 Be5 20.Nb3 (20.Ke2 Rae8+–) 20...Rac8 (20...Bc6 21.Nc5 Rac8 22.Na6+/–) 21.Nc5 (21.Ne4!? Rc1 22.Nc1 Bc6+–) 21...Bc6+/– 22.Na6 Rfd8 23.Nc5 Rd6 24.Rc2 f5 25.g3 (25.Ke2 Rh6+–) 25...Rcd8 26.Ke2 Rd3 (26...h6 27.Rhc1+–) 27.Rb1 (better is 27.Rhc1+–) 27...Rc8? (better is 27...Kf7+–) 28.Nd3 ed3 29.Kd3 Bf3 (29...Bc3 30.dc3 (worse is 30.Kc3 Be4 31.Kd4 Rc2+=; 30.Rc3?! Be4 31.Kd4 Rc3 32.dc3 Bb1+/–) 30...Be4 31.Kd2 Rd8 32.Kc1+–) 30.Rcc1 (30.Rbc1 Rd8 31.Kc4 Be4 32.Ne4 fe4+–) 30...Kf7 (30...Rd8 31.Kc2 Bc3 32.Kc3+–) 31.Kc2 (31.Rb2!? Ke6+–) 31...Be4 (31...Bc3 32.dc3 Be4 33.Kb3 Bb1 34.Rb1+–) 32.Kb3 (32.Kb2 Bb1 33.Kb1 Ke6+–) 32...Bd3 (32...Bc3 33.dc3 (33.Rc3?! Rc3 34.dc3 Bb1+=) 33...Bb1 34.Rb1+–) 33.Nd1 (33.Rb2!? Ke6+–) 33...Rd8 (33...Re8 34.Ka2 Bb1 35.Kb1+–) 34.Rc2 (34.Rb2 Bb2 35.Rc7 Kg6 36.Nb2 a6+–) 34...a5 (34...h6 35.Rbc1 Bc2 36.Kc2 Rc8 37.Nc3+–) 35.Nb2 Be4 (35...Bc2 36.Kc2 ab4 37.ab4 Bb2 38.Rb2+– (38.Kb2?! Rd2 39.Kc3 Rf2+–)) 36.d4 (36.d3 Bd3 37.Nd3 Rd3 38.Ka4 ab4 39.ab4 Rd7+–) 36...Bd6 (36...ab4 37.ab4 Bd6 38.Rbc1 Bc2 39.Rc2+– (39.Kc2?! Rc8 40.Kd1 Rc1 41.Kc1 Bb4+–)) 37.Rbc1 (37.Nc4 a4 38.Kb2 Ke7+–) 37...Bc2 38.Rc2 (38.Kc2?! ab4 39.ab4 Rc8 40.Kd1 Rc1 41.Kc1 Bb4+–) 38...ab4 39.ab4 Rb8 40.Nd3 Ke6 (40...Ke7 41.Kc4+–) 41.Kc4 Rc8 (41...Rb6 42.Nc5 Ke7 43.Ra2+–) 42.Nc5 Ke7 43.Ra2 Kf7 (43...Bb8 44.b5+–) 44.Ra7 Be7 (44...Rc7 45.Ra6 Bc5 46.dc5+–) 45.b5 Ke8 (45...Rb8 46.Nd7 Rc8 47.Kd5+–) 46.b6 Rd8 47.b7 (47.b7 Bd6 48.Ne6+–; 47.Kb5 h5+–) 1–0. Wisniewski,Jan – Szczesiak,Zenon, corr 2AMM Poland, 1994.

7.Nc3 Be6 8.cd5 cd5 9.Nb5 Qd8 10.Nd4= Qb6 (10...Bd6 11.Ne6 fe6 12.Bb5 Kf7 13.Nh3=) 11.Ne6 (11.Rc1 Nd7=) 11...Qe6 12.Bb5 Nc6 13.Ne2 Be7 14.0–0 (14.Rc1 Rc8=) 14...0–0 15.d4 (15.Rc1 Rfc8=) 15...a6 (15...Bd6 16.Qd2+=) 16.Ba4 (16.Nf4 Qd6 17.Bc6 bc6=) 16...b5 (16...Bd6 17.Rc1=) 17.Nf4 Qd6 (better is 17...Qf5!? 18.Bb3 Rfd8=) 18.Bb3+/– a5 19.Bd5 ab4 20.ab4 (20.Qc2 Rac8 21.Bc6 Qc6 22.Qc6 Rc6+/–) 20...Ra1 21.Qa1 g5 22.Bc6 Qc6 23.Rc1 Qb7 (23...Ra8 24.Qb1 (24.Rc6?? Ra1 25.Rc1 Rc1) 24...Qb7 25.Nh5+/–) 24.Nh5 f5 25.d5 (25.Qa2 Rf7+–) 25...Rf7 26.Qe5 Bd8 (26...Qa6 27.Rc7 Bf6 28.Qe8 Rf8 29.Nf6 Qf6 30.Qb5+–) 27.d6 Qa6?? (27...Qd7+–) 28.Ng3 (28.Qe8 Rf8 29.Qd7 Bf6 30.Nf6 Rf6 31.Rc8 Qc8 32.Qc8 Rf8+–) 28...Bf6 (28...f4 29.Nf5 Rf5 30.Qf5 Qd6 31.Qb5+–) 29.Qd5 Bb2 (29...Kf8 30.Qe6 Bd8+–) 30.Rc7 1–0. Wisniewski,Jan – Wantoch_Rekowski,Jacek, corr 2AMM Poland, 1993.

7.Nc3 Be6 8.cd5 cd5 9.Nb5 Qe7 10.Nd4 =.

7.Nc3 Be6 8.cd5 cd5 9.Rc1 Nc6=.

7.Nc3 Be6 8.cd5 cd5 9.f3 Qe5 10.Bb5 Nc6 11.fe4 de4=+ 12.Bc6 bc6 13.Qc2 Bf5 14.Nge2= a5 15.Qa4 Bd7 16.0–0 c5 17.b5= f5 18.Ng3 Bd6 19.Qc4 Be6 20.Qe2 0–0 21.b6 c4 22.Rfb1 Qf6 23.b7 Rab8–/+ 24.Rb5 Qe7 25.Ra5 Qb7 26.Rb5 Qc7 27.Qf2 f4 28.ef4 Rf4 29.Qd4? Rb5–+ 30.Nb5 Bc5 31.Nc7 Bd4 32.Kh1 Ba1 33.Ne6 Rf2 (33...Rf2 34.Nc7 Be5–+) 0–1. Psion – Psion, 4 Min/Zug, 1990.

5.c4 Be6

6.c5 c6 7.Qa4 Be7 8.Bd4 0–0 9.b5 Qc7 10.b6 Qd7 11.ba7 Na6! 12.Ba6 Ra7 13.Qd1 Ra6 14.Nc3 Rfa8 15.Qc1 Ng4 16.h3 Nh6 17.g4 f6 18.Nge2 Nf7 19.Ng3 Ng5 20.Nce2 Nf3 21.Kf1 Nd4 22.ed4 f5 23.Nf4 fg4 24.Ne6 Qe6 25.h4 Qf7 26.h5 Qf3 27.Rh2 Ra3 28.Ra3 Ra3 29.Qb2 Rb3 30.Qc2 Bg5 31.Nf5 Qd3 32.Qd3 Rd3 33.Ke2 Rd2 34.Kf1 e3! 35.Ke1 Bf4 36.Rg2 g3! 37.Ng3 Bg3 38.Rg3 Rf2 39.Re3 Rh2 40.Re7 Rb2 41.Kd1? Kf8 42.Rc7 Rb4 43.Kc2 Rd4 44.Rb7 Rc4 45.Kb3 Rc5 46.Kb4 Rb5! 47.Rb5 cb5 48.Kb5 Ke7 49.Kc5 Ke6 50.Kd4 g6 51.hg6 hg6 52.Ke3 Ke5 53.Kd3 g5 54.Ke3 g4 55.Kf2 Ke4 56.Kg3 d4 57.Kg4 d3 58.Kg3 d2 59.Kf2 d1Q 60.Kg2 Qf3 61.Kg1 Ke3 62.Kh2 Qf5 63.Kg1 Qg4 64.Kf1 Kf3 65.Ke1 Qb4 66.Kf1 Qb1# 0–1. riverborne – Jo90, Live Game Caissa's Web, 2006.

6.c5 c6 7.Nc3 Be7 8.d3 0–0 9.de4 Ne4 10.Ne4 de4 11.Qc2=.

6.c5 c6 7.Nc3 Be7 8.h3 Nbd7 9.Nge2 0–0 10.Nd4 a6 11.Be2 Re8 12.Ne6 fe6 13.0–0 Nf8 14.d3 ed3 15.Bd3 e5 16.Nb1 e4 17.Be2 Ne6 18.Nd2 Rf8 19.Nb3 Nd7 20.Bg4 Nc7 21.Nd4 Bf6 22.Ne6 Ne6 23.Be6 Kh8 24.Bf6 Nf6 25.Bg4 Ng4 26.Qg4 Qe7 ½–½. hal1958 – Sirius, playchess.de, 2003.

6.c5 c6 7.Nc3 g6 8.d3= ed3 9.Bd3 Bg7 10.Nf3 0–0 11.0–0 Nbd7 12.Ne2 Re8 13.Ned4 Bg4 14.h3 Bf3 15.Nf3 Qc7 16.Qc2 Ne4 17.Bg7 Kg7 18.Nd4 Ne5 (better is 18...Ndf6!?+=) 19.Be4+/– de4 20.Qe4 Qd7 21.Rad1 f5 22.Qf4 Nf7 (22...Qf7 23.Qg3+–) 23.Nb5! Qd1? (23...cb5 24.Qd4 (24.Rd7)) 24.Rd1 cb5 25.Rd7 Rab8 (25...Rad8 26.Rb7 Rd1 27.Kh2 a6+–) 26.Qc7 Rf8 27.Rf7! Rf7 28.Qb8 a6 29.Qe5 Rf6 (29...Kg8 30.Kf1+–) 30.g4 fg4 31.hg4 h6 32.f4 g5 33.f5 Kf7 (33...a5 34.Qc7 Rf7 35.Qa5+–) 34.Qd5 (34.Qd5 Ke7 35.Qb7 Kd8 36.Qd5 Ke7 37.Qe5 Kf7 38.c6+–) 1–0. pierred – silverback41948, ChessWorld.net, 2005.

6.c5 Be7 7.d3+=.

6.cd5 Qd5 7.Bf6 gf6 8.Nc3+/–.

6.cd5 Nd5 7.Nc3 f5 (7...Nc3 8.Bc3 Bf5 9.Ne2=) 8.Nd5 (8.Qh5 g6 9.Qe2 Rg8+=) 8...Qd5+= 9.Nh3 (9.Ne2 Qd7=) 9...Nd7 (9...Qb3 10.Qb3 Bb3 11.d3+=) 10.Nf4+= Qb3 11.Ne6 Qe6 12.Rc1 c6 13.Bc4 (13.d3 Rd8+=) 13...Qg6= 14.Kf1 (14.0–0 Bd6=) 14...Bd6 (14...Be7 15.Kg1=) 15.d4 (better is 15.d3 Ne5 16.Be5 Be5 17.d4=) 15...Nf6 (better is 15...Nb6!?+=) 16.d5+/– Rd8 (16...cd5 17.Bd5 Nd5 18.Qd5+/–) 17.dc6+= bc6 18.Qa4 f4 (18...Ke7!?+/–) 19.ef4 Bf4 20.Qc6 Ke7 21.Re1 e3 (better is 21...Rhe8 22.Bf6 gf6 23.Re4 Kf8 24.Re8 Re8+–) 22.Qc5 Ke8 23.Bd4 Ne4 (23...Nd7 24.Bb5 Bd6 25.Qa7+–) 24.Bb5 Kf7 25.Qa7 Kf8 26.Be3 Qf5 (26...Be5+–) 27.Bc5 Bd6 28.Bd6 Rd6 29.Qa8 Kf7 Do you see the mate threat? 30.Bc4 (30.Bc4 Kf6 31.Qe4 Qe4 32.Re4 Rd1 33.Re1 Re1 34.Ke1+–; 30.Qb7!? Kg6 31.Qe4 Qe4 32.Re4 Rb8+–) 1–0. Busch,K – Ranby,Hans, corr SOK–90–59, 1990.

6.cd5 Nd5 7.d3 ed3 A) 8.Nf3 a5 (8...Bf5 9.Nd4 Be4 10.Bd3 Bg2 11.Rg1 Bh3+=) 9.b5 Nd7 10.Bd3 Nc5 11.Be2 Nb6=; B) 8.Bd3 B1) 8...a5 9.ba5 (9.b5 Nd7 10.Nf3 Nc5= 11.Be2 Nb6=) 9...Nd7 (9...Na6 10.Nf3 Nc5 11.Bc2 Ra5=) 10.Nf3 Nc5 11.Bc2 Ra5=; B2) 8...Nd7 9.Nf3 c5 10.bc5 Nc5 11.Bb5 Bd7=.

6.cd5 Nd5 7.d3 Bf5=.

6.cd5 Nd5 7.Ne2 Qg5 (7...Qh4 8.Nbc3=) 8.Nd4+= Bd7 (8...Bd6 9.Ne6 fe6 10.Nc3 Nc3 11.dc3+=) 9.Qc2 (9.d3 ed3 10.Qd3 Nc6+=) 9...f5 (9...Qg6 10.d3 ed3 11.Bd3 Qg2 12.Be4 Ne3 13.Qd3+–) 10.f3 (10.d3 ed3 11.Qd3 Nb6+=) 10...ef3 (10...a5!? 11.Qb3 Ne7=) 11.Nf3+= (11.gf3?! Nc6+=) 11...Qh6 (11...Qg6 12.Nc3 Nc3 13.Qc3+/–) 12.Nc3+/– Nc3 13.Qc3 (worse is 13.dc3 Qe3 14.Qe2 Qe7+=; 13.Bc3?! Bd6+=) 13...Qc6 (better is 13...Nc6!?+/–) 14.Qe5+– Qe6 15.Qc7 Nc6 16.Qb7 Rb8 17.Qa6 f4 (17...Rb6 18.Qd3+–) 18.Bc4 Qg6 19.0–0 Rb6 20.Qa4 fe3 21.Rae1 Be7 22.Re3 a6 23.Rfe1 Kd8 24.Rd3 Rf8 25.Rd7! (25.Rd7 Kd7 26.Ne5 Kd8 27.Ng6 hg6 28.Qc2+–; 25.Ba6?! Rf3 26.Rf3 Ne5=) 1–0. Valenta,Vit jr – Taborska,V, Tatry Open Tatranske Zruby SVK, 2006.

6.Bf6 Qf6+= 7.Nc3 dc4 8.Ne4 Qg6 9.Nc3 (9.Nc5 Bd5+=) 9...Bd6 (9...a5 10.b5+=) 10.Nf3 (10.d3 cd3 11.Bd3 f5+= (11...Qg2? 12.Be4 Qg5 13.Bb7+–)) 10...Nd7 (10...0–0 11.d4+=) 11.Nb5 (11.d3 cd3 12.Bd3 Qg2=) 11...0–0 (11...a5 12.d3 c3 13.Qc1=) 12.Rc1 Ne5 13.Nd6 cd6 14.Ne5 (14.d4 Nf3 15.Qf3 d5+=) 14...de5+= 15.Qf3 (15.Qc2 Qf6+=) 15...e4 16.Qf4 b5 17.g4 (17.h4!?–/+) 17...Qg4–+ 18.Qg4 Bg4 19.a4 (19.Bg2 f5–+) 19...a6 20.Be2 (20.Rg1 Be6–+) 20...Be2 21.Ke2 Rad8 (21...ba4?! 22.Rc4 f5 23.Ra1+=) 22.Rc3 (22.Rhd1 Rd3–+ (22...ba4?! 23.Rc4 f5 24.Ra1+=)) 22...Rd5 (22...Rd6 23.ab5 ab5 24.Ra1–+) 23.Ra1 Rfd8 24.Rc2 g6 25.ab5 ab5 26.Ra7 Rd3 (26...Kf8 27.Rca2–+) 27.Re7 (27.Rb7 R8d5–+) 27...Rb3 28.Ra2 Rd5 (28...Rb4 29.Re4 Kf8 30.Rf4–+) 29.Raa7 (29.Re4 Kf8–/+) 29...Rf5 (29...Rb4!? 30.Ra8 Kg7 31.Ra2–+) 30.Re4–/+ Rb4 31.Rb7 (31.Rd4 Kg7–/+) 31...g5 (31...Kg7 32.Re8–/+) 32.h4 h6 33.h5 (33.Rg4 Rb3–/+) 33...Kg7 34.Re6 Rf6 (34...Rb2 35.Rc6–+) 35.Re5 Rb1 36.Reb5 Rh1 37.R7b6 (37.R5b6 Rh5 38.Rf6 Kf6 39.Rb6 Kg7–/+) 37...Rh5 38.Rf6 Kf6 39.Rc5 Rh4 40.f3 (40.Kf3!?+=) 40...Rh2–/+ 41.Ke1 (41.Kd1 Rh1 42.Kc2 Rf1–/+) 41...Rh1 42.Kf2 (42.Ke2 Rc1–/+) 42...Rd1 43.Kg3 (43.Ke2 Rc1–/+) 43...Rd2–+ 44.Rc4 Re2 45.Rc6 Kg7 46.e4 h5 47.Rc3 Kg6 48.Rc5 (48.Rc6 f6–/+) 48...h4 49.Kh3 Rf2 50.Rf5 f6 51.Kg4 Rh2 52.f4 Rg2 53.Kh3 Rg3 54.Kh2 g4 55.Rd5 Rf3 (55...Rf3 56.Rd2 Rf4–+) 0–1. Bulcourf,Carlos (2280) – Quiroga,Facundo (2340), Buenos Aires FMD tt, 1993.

6.cd5 Bd5

7.Nc3 a5 8.Nd5 Qd5 9.Bf6 gf6 10.b5 c6+=.

7.Nc3 Be6 8.Bb5 c6+= 9.Ba4 (9.Be2+=) 9...b5 (9...a5!? 10.b5 Bc4=) 10.Bc2+= a5 (10...Bf5 11.Qb1+=) 11.ba5 (11.Ne4 Nbd7+=) 11...Ra5 (11...Bf5!?=) 12.Ne4+= Ne4 (12...Nbd7 13.Nf3+=) 13.Be4+/– Ra4 14.Bc2 Ra8 (14...Rg4 15.Qf3+=) 15.Nf3+/– Nd7 (15...Bd6 16.Qb1+/–) 16.0–0 (16.Nd4 Nc5+–) 16...Nf6 (16...Nc5 17.Nd4 Qd7 18.Ne6 Qe6 19.Qf3+–) 17.Nd4 Bd5 (17...Bd6 18.Nc6 Bh2 19.Kh2 Qd6 20.Ne5 Ng4 21.Kh1 Ne5 22.Qh5 Qd2 23.Be5 Qc2 24.Bg7+–) 18.Re1 (18.e4 Bc4 19.d3 Be6+–) 18...Ne4 (18...Qd7 19.a4+–) 19.d3 Nf2 (better is 19...Nc5+–) 20.Kf2 Qh4 21.Kg1 Bg2 (21...Bd6 22.h3 Qg3+–) 22.Kg2 Bd6 23.Rh1 (23.Nf3 Qe7+–) 23...0–0 (23...Qg5 24.Kf2 Qh4 25.Ke2+–) 24.Qf3 Rae8 (24...Qg5 25.Kf1 Be5+–) 25.Nf5 Qg5 26.Kf2 Be5 27.Rag1 Qf6 (27...Qg6 28.Rg6 fg6 29.Be5 Re5 30.Ne7 Re7 31.Bb3 Rff7 32.Kg2+–) 28.Rg7 Kh8 29.Rh7! 1–0. Da Silva Junior,M A (1710) – Weibull,OFT, 3rd Floripa Chess Open, 2017.

7.Nc3 Be6 8.Qc2 a5 9.Ne4 ab4 10.Nf6 gf6+=.

7.Nc3 Be6 8.Qc2 Bf5 9.Nge2 Bd6 10.Ng3 The pressure on e4 grows (10.Nd4 Bg6=) 10...Bg3= 11.hg3 0–0 12.g4 Ng4 (worse is 12...Bg4 13.Ne4 Bf5 14.Bf6 gf6 15.d4+–) 13.Ne4 Qd5? (better is 13...Re8!? 14.d3 a5+=) 14.Qc3+– Threatening mate... how? 14...Qe5 15.Qe5 Ne5 16.Be5 (16.Nc5 b6 17.Be5 bc5 18.bc5 Nd7+–) 16...Be4 17.Bc7 Rc8 (17...Nc6 18.d4+–) 18.Be5 (18.Bf4 a5 19.b5 Nd7+–) 18...Nd7 (18...a5 19.Rh4 f5 20.d3+–) 19.Bc3 (19.Bd4 a5 20.f3 Bc2+–) 19...Rc7 20.f3 Bd5 21.Bd3 h6 22.Kf2 (22.Bd4 Rac8+–) 22...Nb6 (22...Rac8 23.Rh5 Be6 24.Be4+–) 23.Be5 Re7 (23...Rc6 24.b5 Rcc8 25.Bd4+–) 24.Bd4 Nc4 25.Rhd1 (25.Rh5 Be6 26.g4 f6 27.Bc4 Bc4+–) 25...b6 (25...b5 26.a4 ba4 27.Ra4+–) 26.Be2 f5 (better is 26...Rae8+–) 27.d3?? (better is 27.Rac1 b5 28.a4+–) 27...Ne3= 28.Rd2 (28.Be3 Rae8) 28...f4+= 29.Rc1 Kf7 30.Bb2 (30.Bf1 Rae8+=) 30...g5 31.Rh1 Kg6 (better is 31...Re6+=) 32.g4?? (better is 32.d4+=) 32...Ng4!–+ 33.Kg2 (33.fg4 Exploits the pin 33...Bh1) 33...Rae8 34.Re1 Ne5 (34...h5 35.Bd4–+) 35.Kf2 (35.Be5 Re5 36.Kf2–+) 35...g4! 36.Rg1 (36.fg4 Ng4) 36...g3 37.Kg2 (37.Rg3 fg3 38.Kg3 Nf3 39.Bf3 Re3–+) 37...Nf3! (37...Nf3 38.Bf3 Re2 39.Kh3 Bf3–+) 0–1. Agrest,Roman (2050) – Hallerod,Ralph (2210), sen.SWE–ch Senioren, 2005.

7.Nc3 Be6 8.Qc2 Bf5 9.Nf3 ef3 (9...Be7!? 10.Ng5 0–0+/–) 10.Qf5+– fg2 11.Bg2 c6 12.Ne4 Ne4 13.Be4 Nd7 14.b5 cb5 (14...Qa5 15.Bd3 Nc5+–) 15.Bb7 Rb8 16.Bc6 Qe7 (16...Rb6 17.Rc1 Qc7+–) 17.Bd7 (17.Bb5?! Qe6 18.Bd7 Kd7+–) 17...Qd7 (17...Kd8 18.Bb5 a6 19.Ba6+–) 18.Qe5 (18.Qe5 Be7 19.Qb8 Qd8 20.Qb5 Qd7 21.Qb8 Qd8 22.Qd8 Kd8 23.Rg1+–) 1–0. pierre – oppotiefz, internet, 2010.

7.Nc3 Be7 8.Nge2 (8.d3 0–0 9.de4 Be4 10.Ne4 Ne4+=) 8...a5 9.Nf4 (9.b5 0–0 10.d3 ed3=) 9...ab4 10.Ncd5 Nd5 11.Bg7 Rg8 12.Nd5 Qd5 (worse is 12...Rg7 13.ab4 (13.Nb4?! c6=) 13...Ra1 14.Qa1+/–) 13.ab4 Ra1 14.Qa1 Bb4 15.Qe5 (15.Qa4 Nc6 16.Bc3 Bc3 17.dc3 Qe5 18.Qa8 Nd8 19.Qa4 c6=) 15...Qe5+= 16.Be5 Kd7 17.g3 c6 (17...f5 18.Bc4 Re8 19.Bc3=) 18.Bh3= Ke7 19.Bf5 h6 (19...Rg5!? 20.g4 Nd7+=) 20.Be4+/– Nd7 21.Bd4 c5 22.Ba1 Ra8 23.Ke2 Rb8 (23...Ra2 24.Rd1+/–) 24.Bg7 h5 25.Ra1 Rd8 (better is 25...Ke6+–) 26.Bb7 Nb6 27.Ra2 Nc4 28.d3 Nd6 29.Bf3 Nf5 (29...Rg8 30.Bb2+–) 30.Bb2 h4 31.Ra7 Rd7 (31...Kf8 32.g4 Nd6+–) 32.Rd7 Kd7 33.Bg4 (33.Bg4 Kc6 34.Bf5 hg3 35.fg3+–) 1–0. pierre – yessmate, internet, 2008.

7.d3 a5 8.b5=.

7.d3 c5 8.de4 Be4 (8...Ne4!? 9.bc5 Nc6=) 9.Qd8+= Kd8 10.bc5 Bc5 11.Nc3 Bc2 12.Rc1 Bb3 13.Nf3 Nbd7 14.Bd3 h6 15.0–0 Ke8 16.Ne4 Be7 17.Nf6 Nf6 18.Bb5 Kf8 19.Rc3 b6?? (better is 19...Bd5+=) 20.Rb3+– 1–0. Fournier,Frederic – pepitopalo, Active (5/0), 2005.

7.d3 Nc6 8.de4 (8.Nc3 ed3 9.Nd5 Qd5 10.Qd3 Qe6+=) 8...Ne4= 9.Nf3 Be6 (9...Qd7 10.b5 Ne7 11.Nbd2=) 10.Bd3+= Nf6 11.0–0 Bg4 12.Be2 Be7 13.h3 Bh5 14.Nbd2 0–0 15.Qc2 h6 (15...a6 16.Rfd1+=) 16.Bd3 (16.Rfd1 Bg6 17.Qc3 Bd6+/–) 16...Qd5 (16...a6 17.g4 Bg6 18.Bg6 fg6 19.g5+/–) 17.e4 (17.Rac1 Rad8 18.Bf6 Bf6 19.Bh7 Kh8+/–) 17...Qd7 18.e5 Nd5 19.Bh7 Kh8 20.Bf5 Qe8 21.e6 (better is 21.Rfd1+=) 21...f6?? (better is 21...fe6 22.Be6 Bg6=) 22.g4+– a6 (22...Nf4 23.gh5 Qh5 24.Qe4 Nh3 25.Kg2+–) 23.gh5 Qh5 24.Qe4 Nb6 (24...Rad8 25.Nc4+–) 25.Nh4 (better is 25.Bg4 f5 26.Bh5 fe4 27.Ne4+–) 25...g6 (25...Rfd8 26.Ng6 Kg8+–) 26.Ng6 Kg7 27.Kh1 Rfd8 (27...Bb4 28.ab4 Nc8 29.Nf4+–) 28.Rg1 1–0. Zaichenko,Andrey – Plantu,Thierry, FICGS, 2008.

7.d3 Nbd7 8.de4 (8.Nc3 ed3 9.Nd5 Nd5 10.Bd3 c6+=) 8...Be4= 9.Nf3 Bd6 (9...a5 10.ba5 Bd6 11.Nbd2=) 10.Bc4 (10.Nc3 0–0=) 10...Bf3 (10...Nb6 11.Bb3=) 11.Qf3 Ne5 (better is 11...c6!?=) 12.Qb7+/– Rb8 13.Qa6 Rb6 (better is 13...Nc4 14.Qc4 c5+/–) 14.Bb5?? (better is 14.Qa4 Nfd7 15.Nd2+–) 14...c6–+ 15.Bc6 Rc6 16.Qa7?? (better is 16.Qa4 Qc7 17.0–0–+) 16...Nd3 (16...Nd3 17.Kf1 Nb2–+) 0–1. Zaichenko,Andrey – Plantu,Thierry, FICGS, 2008.

7.Bf6 Qf6 8.Nc3 Qe6 9.Qc2 (9.Nd5 Qd5 10.d4 Bd6 11.Qc2 0–0 12.Bc4=; 9.d4 Bd6 10.Nd5 Qd5 11.Qc2 0–0 12.Bc4=; 9.Nge2 Bd6 10.Nd5 Qd5 11.Nc3 Qe5 12.Qc2=; 9.d3 a5 10.de4 Be4= 11.Nf3 Bf3 12.Qf3=; 9.Nh3 Bd6 10.Qc2 f5 11.Nd5 Qd5 12.Bc4=) 9...c5 10.Bb5 Bc6 11.bc5 f5 12.Bc6+=.

5.c4 Be7

6.Nc3 c6 7.Nge2 0–0 8.Ng3 Bg4 9.Be2 Be2 10.Qe2 Nbd7 11.0–0 Ne5 12.Rad1?? Nc4–+ 13.Bc1 Ne5 14.Nf5 Nd3 15.f3 Re8 16.fe4 Ne4?? 17.Qd3+– Nc3 18.Ne7 Qe7 19.Qc3 Rad8 20.Bb2 f6 21.Rf3 Qd6 22.Qc5 Qd7? 23.a4 a6 24.h3 Re4 25.d3 Re6 26.Bd4 Rde8 27.Rb1 Rd8 28.b5 ab5 29.ab5 Rc8 30.bc6 Rec6 31.Qa3 Qc7 32.Rff1 Qd7 33.Qb3 h6 34.Qb7 R6c7 35.Qb3 Kh7 36.Qd1 Rc2 37.Qg4 Qg4 38.hg4 Rd2 39.Rbd1 Ra2 40.Rf2 Ra4 41.Kh2 Ra3 42.Rfd2 Rb3 43.Kg3 Rb5 44.Kf4 Rb7 45.e4 de4 46.de4 Rb4 47.Be3 Rcc4 48.Rd4 Rd4 49.Rd4 Rb7 50.g3 Rf7 51.Ra4 Rc7 52.Ra7 Rc2 53.e5 fe5 54.Ke5 Rb2 55.Bd4 Re2 56.Kf4 Kg8 57.Rg7 Kf8 58.Rh7 Ra2 59.Rh6 Kf7 60.Ke4 Re2 61.Be3 Ra2 62.g5 Ra4 63.Bd4 Ra8 64.Rf6 Ke7 65.g4 Ra2 66.Rf5 Re2 67.Be3 Re1 68.g6 Ke6 69.Re5 Kf6 0–1. bratek55 (1610) – roberta12 (1665), kurnik, 2011.

6.d4 0–0 7.Nc3+=.

6.d4 ed3 7.Qd3 (7.cd5 a5=) 7...Be6 (7...0–0 8.cd5 a5 9.b5=) 8.Nd2 (8.cd5 Qd5 9.Qd5 Bd5+=) 8...0–0 (8...a5 9.cd5 Qd5 10.b5=) 9.Ngf3 dc4 (9...Nbd7 10.Ng5=) 10.Nc4 (10.Qd8 Rd8 11.Bc4 c5 12.bc5 Bc4 13.Nc4 Nbd7=) 10...Qd3 (10...Nbd7 11.Ng5=) 11.Bd3 Nbd7 (11...c5 12.bc5 Nbd7 13.Nd4 Nc5 14.Be2=) 12.0–0 (12.Nd4 Bd5+=) 12...h6 (12...c5 13.b5=) 13.h3 (13.Rfd1 c5 14.b5 a6=) 13...Nd5 (13...c5 14.b5=) 14.Nd4 c5 15.Ne6 (15.Nf5 cb4 16.Ne7 Ne7 17.ab4 Nd5=) 15...fe6= 16.b5 b6 (16...a6 17.a4=) 17.Rfd1+= Rad8 (17...Bf6 18.Bf5 Kf7 19.e4 ef5 20.Rd5 Bb2 21.Rd7 Ke6 22.Rd6 Ke7 23.Rad1+=) 18.Be2 (18.Be4 N7f6 19.Bf3 g5+=) 18...Bf6 19.Rac1 Bb2 20.Nb2 Ne5 (20...N7f6 21.Bd3=) 21.Nc4 Nc4 22.Bc4 Kf7 23.e4 (23.Rd3 Ke7+=) 23...Nc7 (23...Nf4 24.h4+=) 24.f3 Kf6 25.Kf2 e5 26.Ke3 (26.Rd8 Rd8 27.Ke3 Rd4=) 26...Ne6 (26...Rd4 27.Rf1=) 27.Be6 (27.Rd8 Rd8 28.g3 Nd4=) 27...Ke6 ½–½. Schuchardt,Wolfgang (1690) – Zapnik,Gordon (1605), Germany, 2006.

6.cd5 Qd5 7.Nc3 Qc6?? 8.Bb5+– Bg4 9.Bc6 Nc6 10.f3 ef3 11.gf3 Bh5 12.Qe2 0–0 13.0–0–0 Rfe8 14.Qg2 a6 15.Nge2 Bg6 16.Rhg1 Bd6 17.f4 Ne7. thedesertfox (1920) – winston (1875), net–chess.com, 2004.

6.cd5= Qd5 7.Nc3 Qd8 8.Rc1 0–0 9.f3 Bf5 10.fe4 Be4 11.Ne4 Ne4 12.d3 Ng5 13.Nf3 Nf3 14.Qf3 Nc6 15.Be2 Ne5?? 16.Be5+– 1–0. maaxa – Patzer, Live Game Caissa's Web, 2004.

6.cd5 Qd5 7.Nc3 Qe6 8.Rc1 Nbd7 9.Nb5 Nd5 10.Bc4 N7b6?? (better is 10...Bd8 11.Qh5 N5f6 12.Be6 Nh5+–) 11.Nc7!+– Nc7 12.Be6 Ne6 13.f4 0–0 (13...f6 14.Nh3+–) 14.f5 Nc7 (14...Ng5 15.h4 Bf5 16.hg5+–) 15.Rc7 (15.Rc7 Bh4 16.g3+–) 1–0. marekt – 810609, internet, 2013.

6.cd5= Qd5 7.Nc3 Qe6 8.d3=.

6.cd5 Qd5 7.Nc3 Qf5 8.Nge2+=.

6.cd5 Qd5 7.Nc3 Qg5 8.Qc2+= Bf5 9.Nh3 Bh3 (better is 9...Qh6!?+=) 10.gh3+/– 0–0 (10...Nc6 11.Ne4 Ne4 12.Qe4+/–) 11.Ne4+– Ne4 12.Qe4 c6?? (better is 12...Bf6 13.Qb7 Bb2+–) 13.h4! Qh4 (13...Qd5 14.Qe7 Qh1 15.Qb7+–) 14.Rg1 Qe4 15.Rg7 Kh8 16.Rf7 Kg8 (16...Bf6 17.Bf6 Kg8 18.Rg7 Kh8+–) 17.Rg7 Kh8 18.Re7 Kg8 19.Rg7 Kh8 20.Rg5 1–0. pereira – kwigcu, internet, 2009.

6.cd5 0–0

7.Qc2 a5!? =.

7.Qc2 c6 8.dc6+= Nc6 9.d4 (9.Nc3 Re8+=) 9...ed3 10.Bd3 (10.Qd3 Qd3 11.Bd3+=) 10...h6 (10...Bb4 11.Nd2=) 11.Nf3 (11.b5 Na5+/–) 11...Bg4 (11...Bb4 12.Nbd2= (worse is 12.ab4 Nb4 13.Bh7 Nh7–/+)) 12.Be2 (12.b5 Bf3 13.gf3 Na5+/–) 12...Rc8 13.Nc3 Qc7 14.0–0 (14.Rd1 a5 15.Ne4 Ne4 16.Qe4 Bf3 17.gf3 Rfe8+/–) 14...a6 (14...Ne5 15.Nd4+/–) 15.Rac1+/– Rfd8 16.Rfd1 (16.Ne4 Nd5+/–) 16...Qb8 (16...Rd1 17.Nd1 Qd6 18.h3+/–) 17.Rd8 Nd8 (17...Rd8 18.Ne4+/–) 18.Qd1 (18.h3 Bd7+/–) 18...Ne6 (18...Bd6 19.h3 Be6 20.b5+/–) 19.Nd5 (19.h3 Bf5+/–) 19...Nd5 20.Qd5 Rc1 21.Bc1 Bf6 22.Qd2 (22.h3 Qc8 23.Bd2 Nc7+/–) 22...Bf5 (22...b5 23.h3 Bf5 24.Bb2 Bb2 25.Qb2+/–) 23.Bb2 (23.b5+/–) 23...Bd8 (23...Bb2 24.Qb2 b5 25.Qc3+/–) 24.Nd4 (24.Qd5!? Bb1+–) 24...Qd6+/– 25.Bf3 Bc7 26.g3 (26.Bb7?! Qh2 27.Kf1 Qh1 28.Ke2 Bg4 29.Nf3 Qg2=) 26...Ng5 (better is 26...b5!?+/–) 27.Bb7+– Ne4?? (27...Qb6 28.Bg2 Be4+–) 28.Qe2 (28.Qc2!? Ng3 29.Nf5 Nf5 30.Qf5 Qh2 31.Kf1 Qd6+–) 28...Bg6 29.Qa6 Qe5 (29...Qe7 30.Be4 Be4 31.Qc8 Qd8 32.Qg4+–) 30.a4 (30.f4 Qh5 31.Qa8 Kh7 32.Be4 Qd1 33.Kg2 Qd2 34.Kh3 Qb2+–) 30...Kh7 31.Qb5 (31.a5 Qe7 32.Nc6 Qg5+–) 31...Qf6 ½–½. Eisenhauer,Erik – Jost,Horst, SBRhH–ch H GER, 2001.

7.Nc3 c6 8.dc6 Nc6 9.Bb5 a6 10.Ba4 b5 11.Nb5?? ab5–/+ 12.Bb5 Na7 13.Be2 Bd6 14.f3 Nh5 15.f4?? Qh4–+ 16.Kf1 Ng3! 17.hg3 Qh1 18.Qc2 Bb7 19.Kf2 Qh6 20.Nh3 Rac8 21.Qa4 Nc6 22.Rc1 Kh8 23.Bg4? Rcd8 24.b5? Ra8 25.Qc4? Na5 26.Qa2 f5 27.Be2 Be7 28.Rc7 Rfe8?? 29.Ng5= Bg5 30.Bg7 Qg7 31.Rg7 Bf6?? 32.Rc7+– Bd8?? 33.Rh7! Kh7 34.Qf7 Kh6 35.Qe8 Bf6 36.Qh5 Kg7 37.Qf5 Rf8 38.b6 Bd4 39.Qd7 Kg8 40.Qd4 Rf7 41.Qd8 Kg7 42.Qg5 Kf8 43.Qa5 Rd7 44.Qf5 Rf7 45.Qf7! Kf7 1–0. thedesertfox (2170) – winston (1910), net–chess.com, 2004.

7.Nc3+= Bf5 8.d3 Nbd7 (8...a5 9.de4 Ne4 10.Ne4 Be4 11.Qd4=) 9.de4+/– Ne4 10.Bd3 Nc3 (10...Bf6 11.Qc2 Re8 12.Nge2+/–) 11.Bc3 Bd3 (11...Bf6 12.Ne2 Bd3 13.Qd3+/–) 12.Qd3 Nb6 (12...Bf6 13.Rd1+/–) 13.Rd1 Qd6 14.e4 (14.Qf5 Nc4 15.Qg4 Ne5+/–) 14...Rfe8 (14...Rad8 15.Ne2+/–) 15.Ne2 Bf6 (15...Rad8 16.Bd4+/–) 16.Bf6 Qf6 17.0–0 Na4 (17...a5 18.b5+/–) 18.Rc1+– Rac8 (18...Re7 19.Ng3+–) 19.Qb5 Qa6 (19...Nb6 20.Rc7! Qe5 21.Rc8 Nc8 22.Ng3+–) 20.Qa6 ba6 21.f3 Red8 (21...a5 22.b5+–) 22.Nd4 c5 (22...Rd7 23.Rc6 Nb6 24.Rfc1+–) 23.bc5 (better is 23.Nc6!? Rc6 24.dc6 Kf8 25.bc5 Ke7+–) 23...Rc5 24.Nc6 (24.Rc5 Nc5 25.Rc1 Nd3+–) 24...Rd7 25.Rc5 Nc5 26.Rc1 (26.Rc1 Nd3 27.Rd1+–) 1–0. Khayman,Daniel – Marques,Joao (1700), FICGS, 2006.

7.Nc3 Bg4 8.Qc2 a5 +=.

5.c4 Bg4

6.Qb3 c6 7.d3 dc4 8.dc4 (8.Qc4 Be6 9.Qc2 Bf5 10.Bf6 Qf6=) 8...Nbd7 (8...Bd6 9.f3 Be6 10.Nd2+=) 9.Ne2 (9.Be2 Be6=) 9...Qb6 (9...Bd6 10.h3 Bh5 11.c5=) 10.Nd2= Be6 (10...c5!? 11.Qc2 cb4 12.Ne4 ba3 13.Ba3 Bf5 14.Nf6 Qf6=) 11.Nd4 Ke7? (better is 11...Bg4!?+=) 12.Ne6+– Ke6?? (better is 12...fe6 13.c5 Qc7+–) 13.c5 Ke7 14.cb6 Nb6 15.Bf6 gf6 16.Ne4 Nd5 17.Rd1 Rg8 18.Nc5 (18.Rd5 cd5 19.Qd5 Rd8 20.Qc5 Kd7 21.Bb5 Ke6 22.Bc4 Rd5 23.Qd5 Ke7 24.Qd6 Ke8 25.Nf6) 18...Rb8 19.Bc4 Rg2 20.Bd5 cd5 21.Qd5 Rg1 22.Rg1 Bg7 23.Qd7 (23.Rg7 Rd8 24.Qd8) 23...Kf8 24.Qd6 Ke8 25.Qb8 Ke7 26.Rd7 1–0. van den Braak,Jelle – Lindberg,Rune, corr 3GMM–16, 1995.

6.Qb3 Nc6 7.d4 =+.

6.Qc2=.

6.f3 ef3 7.Nf3 Nc6 8.Nc3 dc4 9.Bc4 Ne5 10.0–0?? Nc4–+ (10...Nc4 11.Na4 Nb2 12.Nb2 a5–+) 0–1. thedesertfox (1990) – nibaldov (1955), net–chess.com, 2004.

6.Bf6?? Bd1?? 7.Bd8+– Kd8 (7...Bb3 8.Bc7 dc4 9.Nc3+–) 8.Kd1 dc4 9.Bc4 f6 (9...f5 10.d3 ed3 11.Nf3+–) 10.Kc2 (10.Bd5 c6 11.Be4 a5+–) 10...Nc6 (10...c6 11.Nc3+–) 11.Ne2 (11.Bd5 f5+–) 11...Kd7 (11...f5 12.Bd5+–) 12.Nbc3 (12.Ng3 f5 13.Nf5 g6+–) 12...Rd8 (12...f5 13.d3 Ne5 14.Rad1+–) 13.Rhd1 (13.Ne4 a5+–) 13...Kc8 (13...a5 14.Ne4 ab4 15.ab4 Bb4 16.d4+–) 14.Ng3 (14.Ne4 Re8 15.N2g3 a5+–) 14...Ne5 (14...a5 15.b5 (worse is 15.Nce4 ab4 16.ab4 Nb4 17.Kb3 c6+–; worse is 15.Nge4 ab4 16.ab4 Bb4+–) 15...Ne5 16.Be6 Kb8 17.Nce4+–) 15.Be6 Kb8 (15...Nd7 16.Nce4 Re8 17.Bf5+–) 16.Bf5 (16.Nge4 Re8 17.Bh3 Nf7+–) 16...Nd3 (16...g6 17.Be4 f5 18.Bf3+–) 17.Be4 (better is 17.Rf1!? c5 18.bc5 Nc5 19.Nge4 g6+–) 17...Nf2 18.Rf1 Ng4 (18...Ne4 19.Nce4 h5 20.h4+–) 19.h3 Ne5 (19...Nh6 20.d4+–) 20.Nf5 (20.d4 Nc4 21.Rf3 a5 22.ba5 Na5+–) 20...Nc4 (20...g6 21.Nd4 f5 22.Ne6+–) 21.d3 Nd6 22.Nd6 (22.Nd4 Ne4 23.Ne4 Bd6+–) 22...Bd6 23.g4 (23.Nb5 c6 24.Nd6 Rd6+–) 23...h6 (23...h5 24.gh5 Rh5 25.Rf3+–) 24.Nb5 a6 (24...Rhe8 25.Nd6 cd6 26.Kd2+–) 25.Nd6 Rd6 26.d4 (better is 26.Rac1 Rhd8+–) 26...Re8 27.Kd3 (27.Bf3 Re3 28.d5 c6 29.dc6 bc6+–) 27...Rde6 28.Rf4 g5 29.Raf1 (better is 29.d5 Re5 30.Rf6 Re4 31.Re1+–) 29...gf4= 30.Rf4 b5 (30...c6 31.a4=) 31.d5 Re5 (31...Rd6 32.Ke2+=) 32.Kd4 Ka7 (32...R8e7 33.h4+=) 33.Bg6 Rd8 34.Bf7 (34.e4 Rd6+=) 34...Rd6 (34...Re7 35.Bh5 (worse is 35.Rf6 Rf8–/+) 35...Rd6 36.e4=) 35.e4 (35.Rf2 Kb6=) 35...Kb6 36.Bh5 (36.Rf1 c6=) 36...a5 37.Rf6? (better is 37.Rf5!? Rf5 38.gf5 (worse is 38.ef5 ab4 39.ab4 Rd7–+) 38...ab4 39.ab4=) 37...Re4! 38.Ke4 Rf6 39.Ke5 (better is 39.h4 Rf1 40.Bg6–/+) 39...Rd6?? (better is 39...Rf3 40.ba5 Ka5–+) 40.Bf7 (40.h4 Rd7=) 40...ab4 (40...Rd7 41.Ke6 Rd8 42.h4+/–) 41.ab4 Kb7 (41...Rd8!? 42.h4 c5 43.dc6 Kc6+=) 42.Be6 (42.h4 Ra6 43.g5 hg5 44.hg5+–) 42...Ra6+= 43.Kd4 (43.h4 Ra2 44.g5 hg5 45.hg5 Re2 46.Kf6 Rf2 47.Bf5+–) 43...Kb6+= 44.h4 Ra1 (44...Ra4 45.g5 Rb4 46.Ke5+=) 45.Ke4 (45.Ke5!?=) 45...Ra4 46.g5 Rb4 47.Kf5 (47.Ke5 hg5 48.hg5 Rb1+=) 47...hg5 (47...Rh4 48.g6 Rh5 49.Kf6 Kc5+=) 48.hg5+= Rb1 49.g6 Rg1 50.Kf6 Kc5 51.g7 Kd6 52.g8Q Do you see the mate threat? 52...Rg8 53.Bg8 b4 54.Bh7?? (better is 54.Be6–/+) 54...Kd5–+ 55.Bg8 (55.Kg5 c5–+) 55...Kd4 56.Kg5 c5 57.Kf4 c4 58.Bh7 Kc3 59.Ke3 Kb2 60.Kd4 c3 61.Kc4 (61.Bg8 c2 62.Bd5 c1Q–+) 61...b3 Black plans c2 62.Bd3 c2 (62...c2 63.Kd4 c1Q–+) 0–1. Trkn – odinthor, itsyourturn.com, 2000.

6.Bf6?? Qf6 7.Qg4 Qa1 8.Qc8 Ke7+=.

5.d3 a5

6.b5 Bd6 7.de4 de4 8.Nd2 =+.

6.b5 Nbd7 7.Nd2 (7.de4 de4 8.Nd2 Bd6=+) 7...Be7 (7...Bd6 8.de4 de4 9.Nc4=+) 8.c4 (8.de4 de4 9.f3 Bc5=+) 8...ed3 (8...Nc5 9.cd5 ed3 10.Qf3=+) 9.Bd3 Nc5 10.Be2 0–0 (10...Bf5 11.Nb3 Nb3 12.Qb3=) 11.Ngf3 (11.cd5 Qd5 12.Ndf3 Rd8=+) 11...Bf5 (11...dc4 12.0–0=) 12.0–0= Qd7 (12...Nd3 13.Bd4=) 13.Nb3 (13.cd5 Nd5 14.Nd4 Bf6=) 13...Na4 (13...Nb3 14.Qb3 Rfd8 15.Rfd1=) 14.Bd4 c5 (14...dc4 15.Bc4 Be6 16.Be6 Qe6 17.Qc2+=) 15.bc6 bc6 16.cd5 Nd5 17.Bc4 (17.Qd2 c5 18.Be5 Rfd8=) unclear. Haertig,Manfred – Djuric,Mirko, PCM–2003–G4 TSC, 2003.

6.de4 ab4 7.ed5 ba3 =.

6.de4 Ne4 7.b5 c6 8.Nf3 f6 9.Nbd2 Nc5 10.Bd4 Ne6 11.c4 Nd4 12.Nd4 Bc5 13.N4b3 Be7 14.Bd3 d4 15.Qh5 Kf8 16.Bg6 de3 17.fe3 Bd6 18.Ne4 Be5 19.Rd1 Qe7 20.0–0 (20.Bh7 cb5 21.cb5 Be6 22.Qe5 fe5 23.0–0 Bf7=) 20...Kg8 (20...cb5!? 21.cb5 Bd7=) 21.Bf7+/– Kf8 22.Ng5 Bc7 (22...fg5?? 23.Be6 Bf6 24.Rd8 Qd8 25.Qf7) 23.Rf6?? (better is 23.Rd3 cb5 24.Nd4+/–) 23...Qf6=+ 24.Rf1 Be5 25.Rf6 Bf6 26.Be6 Be6 27.Ne6 Ke7 28.Nc7 Nd7 29.Na8 Ra8 30.Qh7 Kd6 31.Qc2 Kc7 32.Nd4 Ne5 33.c5 Re8 34.Qa4 Ra8 35.b6 Kd7 36.Nf5 Ke6 37.Nd6 Rb8 38.Qa5 g6 39.Qa7 Rf8 40.Ne4 Rf7 41.Qb8 Rd7 (41...Be7 42.Qb7 Kd5 43.Nc3 Kc4 44.Nd1 Bc5 45.Qa8+–) 42.Qg8 Ke7 43.g4 Nf7 44.Qg6 Be5 45.h4 Rd8 46.g5 Bb2 47.h5 Ba1 48.Nd6 Nd6 49.cd6 1–0. Blankenberg,Bruno – Luzuriaga,Norberto Horacio, 3. 1.b4 Thementurnier, 2000.

6.de4 Ne4 7.b5 Be6 =.

5.d3 ed3

6.cd3 Be7 7.Be2 0–0 8.Nf3 b6 9.0–0 Bb7 10.Nbd2 Nbd7 11.Nd4 c5 12.bc5 Qc7 (12...bc5 13.Nf5+=) 13.c6 (13.cb6 ab6 14.Nf5 Nc5+/–) 13...Bc6 14.Rc1 Nb8 15.Nc6 (15.Bf3 Qd6+/–) 15...Nc6+– 16.Nf3 (16.Bf6 Bf6 17.Qa4+–) 16...Rad8? (better is 16...Qd6+=) 17.Nd4+– Rd6 18.Nf5 (better is 18.Nb5 Qd7 19.Nd6 Qd6 20.Qa4+–) 18...Re6+/– 19.Ne7 Qe7 20.Bf3 (20.Qa4 Qd6+/–) 20...Rd8 (20...Ne5 21.Be5 Re5 22.d4+=) 21.Qa4 Ne5 22.Be5 Re5 23.d4 Re6 24.Rc2 Rdd6 (24...Ne4 25.Rfc1+/–) 25.Rc8 Ne8? (25...Rd8 26.Rd8 Qd8 27.Qa7+/–) 26.Rfc1 (better is 26.Bg4!?+–) 26...Rg6?? (better is 26...f5+/–) 27.Re8 1–0. Trigance,Emile – Gresham,Jonathan, FICGS, 2012.

6.Bd3= Be7 7.Nf3 Bg4 8.Be2 (8.0–0 a5=) 8...0–0 9.0–0 Ne4 (9...a5 10.b5=) 10.Nbd2 (10.Nc3 Bf6 11.Qd3 Nd7 12.Nd5 Bb2 13.Qe4 Bf3 14.Bf3 Re8+=) 10...Bf6 11.Nd4 Be2 12.Qe2 Re8 (12...Nd2 13.Qd2 Re8 14.Rfc1=) 13.Rab1 (13.Rfd1 Bd4 14.Bd4 Nc6+=) 13...Nd6 (13...Bd4 14.Bd4 Nc6 15.Bb2=) 14.c4 dc4 (14...Bd4 15.Bd4 Nc6 16.Ba1 Nc4 17.Nc4 dc4 18.Qc4+=) 15.Nc4 Nc4 (15...Bd4 16.Bd4 Nc6 17.Bb2+=) 16.Qc4+= Nd7 17.Rfd1 Nb6 (17...Ne5 18.Qc5 Qe7 19.Qe7 Re7 20.Nf5+=) 18.Qc2 Qc8 (18...Qe7 19.Nf5 Qe6 20.Bf6 Qf6 21.Rd4+=) 19.Nb5 (19.Rd2 Be5+=) 19...Bb2 20.Rb2 Re7 (20...Rd8 21.Rbb1+=) 21.Qe2 (21.Qc5 Qf8 22.Rbd2 c6+=) 21...a6 (21...a5 22.ba5 Ra5 23.Rbd2+=) 22.Nc3 (22.Nd4 Qe8+=) 22...Qe6= 23.Rbd2 Rae8 24.Rd4 Qf6 (24...c6 25.Qd3+=) 25.Qd3 c6 (25...Qe5 26.a4+=) 26.Ne4+/– Qe6 27.Ng5 (27.Nc5 Qe5+/–) 27...Qh6+= 28.Ne4 (28.Nf3 Qf6+=) 28...Nd5 (28...Qe6 29.Nc5 Qe5 30.Rd8+/–) 29.Ng3 Qf6 30.Rg4 (better is 30.e4 Nf4 31.Qd2+=) 30...Ne3?? (better is 30...Re5=) 31.fe3+– Re3 32.Qf1 (better is 32.Ne4 Qh6 33.Qd4+–) 32...Qe6? (32...Qf1 33.Kf1 g6 34.Rd7+–) 33.Rf4 (better is 33.Nf5!?+–) 33...Qb3 (33...Ra3 34.Re4 Qc8+/–) 34.Rc1 (better is 34.Ne4! h6 35.Rd7+–) 34...Qa3+= 35.Qc4 (35.Rf7 Qc1 36.Qc1 Kf7 37.Qc4 Kf8+/–) 35...Re1 36.Re1 Re1 37.Nf1 Threatening mate: Qxf7 37...Qe3 38.Kh1 (38.Rf2 Qe8+=) 38...Qe8 (38...Qe7 39.Qd3+=) 39.h3 (39.Rd4 Kf8+=) 39...Re7 (39...Qe6 40.Qd4=) 40.Ng3+= Re6 (40...Qb8 41.Qd3+=) 41.Re4 (41.Nf5 Qb8+=) 41...Re4 42.Qe4 (42.Ne4 Qe7+=) 42...Qe4= 43.Ne4 b6 44.Kg1 Kf8 45.Kf2 Ke7 46.Ke3 (46.g4 a5 47.ba5 ba5=) 46...f5 47.Nc3 g5 (47...a5 48.ba5 ba5 49.Kd4=) 48.g4 (48.Kd4 Kd6=) 48...Ke6 (48...f4 49.Kf3+=) 49.gf5 (49.Na4 f4 50.Ke4 a5 51.ba5 ba5 52.Nc5 Kf6 53.Nd7 Kg7+=) 49...Kf5+= 50.Kf3 (50.Ne2!? g4 51.Nd4 Kg5 52.Nc6 gh3 53.Kf3=) 50...h5–/+ 51.Ne2 (51.Ke3 a5 52.Ne2 c5 53.Ng3 Kg6 54.ba5 ba5+=) 51...Ke5 (51...g4 52.Kf2–/+) 52.Ke3–/+ Kd5 (better is 52...a5!?–/+) 53.Kd3= a5 Black fights for the Initiative 54.ba5 ba5 55.Nc3 (better is 55.Ng3!?=) 55...Ke5–/+ 56.Ke3 c5 57.Na4 (57.Ne4 g4 58.h4 a4 59.Nc5 a3–/+) 57...c4 (better is 57...Kd5!?–/+) 58.Nc3 (58.Nb6 c3 59.Nc4 Kd5 60.Na5 g4–/+) 58...Kf5 59.Kf3?? (better is 59.Ne4+=) 59...g4–+ 60.hg4 hg4 ½–½. Reimer,Karl – Schramm,Stefan, PF–op Eisenberg, 1993.

6.Bd3 Be7 7.h3 0–0 8.Nf3 a5 9.b5 c5 10.0–0 b6 (10...Nbd7 11.a4=) 11.c4+= Bb7 12.Nbd2 Nbd7 13.Qc2 Re8? (better is 13...g6+=) 14.cd5+– Nd5 15.Bh7 Kf8 16.Bd3 (better is 16.Nc4!?+–) 16...Bf6+/– 17.Nc4 Bb2 18.Qb2 Re6? (better is 18...Qf6!?+/–) 19.Bf5+– Rf6 20.Bd7 (20.Qc2!? Qe7+–) 20...Qd7+/– 21.Nfe5 Qf5? (21...Qc7 22.Rad1 Re6 23.f4+/–) 22.Qb1 (better is 22.f3 Qe6 23.e4+–) 22...Qg5 23.Nd7?? (better is 23.Qe4 Re6 24.f4+/–) 23...Ke7–+ 24.Nf6?? (24.Qe4 Kd7 25.f4–/+) 24...Nc3 25.g4 (25.Ng4 Nb1 26.Nb6–+) 25...Nb1 26.Rab1 gf6 (26...gf6 27.e4 Rh8–+) 0–1. Sapareva,Magdalena (1620) – Metev,M (2025), 133rd MGU Open, 2015.

6.Bd3= Bg4 7.Nf3 =.

5.d3 Bd6

6.c4 dc4 7.de4 Bb4?? 8.ab4+– Qd1 9.Kd1 0–0? (9...Ne4 10.Ke1 Nc6+–) 10.Bf6 gf6 11.Bc4 Be6 12.Nd2 Bc4 13.Nc4 Nc6 14.b5 Rad8 (14...Ne5 15.Ne5 fe5+–) 15.Ke2 Ne5 16.Ne5 fe5 17.Nf3 (17.Ra7 Ra8 18.Rb7 Rfb8 19.Rb8 Rb8+–) 17...c6 (17...Ra8 18.Rhc1 Rfc8 19.Ne5+–) 18.bc6 bc6 19.Ne5 c5 (19...Ra8 20.Nc6 Rfe8 21.f3+–) 20.Ra7 Ra8 21.Ra8 Ra8 22.Rc1 Ra5 23.Nd3 Ra2 24.Kf3 Rd2 25.Nf4 Kg7 26.Rc5 f5 (26...Rb2 27.Nh5 Kf8 28.Rc8 Ke7 29.Rh8+–) 27.Rf5 (better is 27.ef5 Rd7 28.e4+–) 27...Rd7 (27...h6 28.e5 Ra2 29.e6+–) 28.e5 (better is 28.Ne6 Kg6 29.Nf8 Kg7 30.Nd7 h5+–) 28...Rf7 (28...Re7 29.Nh5 Kg8 30.Nf6 Kg7 31.Rg5 Kf8 32.Rg8 Kf7 33.Ke4+–) 29.Rf7 Kf7 30.Kg4 h5 31.Kh5 Kg7 32.g4 Kh7 33.e6 Kg7 34.Kg5 Kf8 35.Kf6 Ke8 36.Nd5 White prepares e7 36...Kf8 (36...Kd8 37.e7 Kd7 38.g5 Kd6 39.e4 Kc6 40.e8Q Kd6 41.Qb8 Kc5 42.Qb4 Kc6 43.Qb6 Kd7 44.Qc7 Ke8 45.Qe7) 37.Nc7 Kg8 38.e7 Kh8 (38...Kh7 39.e8Q Kh6 40.Qg6) 39.e8Q (39.Kg6 Kg8 40.e8Q) 39...Kh7 40.Qg6 Kh8 41.Qg7 1–0. Nikel,Bogdan (2250) – Vecsei,Miklos (2000), remoteschach.de, 2007.

6.c4 dc4 7.de4 Ne4 8.Nc3 Nc3 9.Bc3 =.

6.c4 dc4 7.de4 Ne4 8.Bg7 Bb4–/+ 9.ab4 Qd1 10.Kd1 Rg8 11.Ke1 Rg7 12.Bc4 Rg2 (12...Be6+=) 13.Bd5 f5 14.Nd2 c6 15.Ne4 cd5 16.Nd6 (16.Nf6!? Kd8 17.Ne2+= (worse is 17.Nh7 Na6=)) 16...Kd8 17.Ne2 Rg6 (17...Nc6 18.Nf4 Rg4 19.b5=) 18.Nc8+= Kc8 19.Nf4 Rd6 20.Rc1 Rc6 21.Ke2 Kd8 22.Nd5 Nd7 23.Rc6 bc6 24.Rg1 Nf8 25.Nf6 Ke7 26.Nh7! Ne6 (26...Nh7 27.Rg7) 27.Ng5 Rb8 28.Ne6 Ke6 29.Rc1 Kd6 30.Ra1 (better is 30.Rc4!?+/–) 30...Rb4= 31.Ra7 Rh4 32.Ra5 c5 33.Ra6 Kd5 ½–½. marekt – alexapple, gameknot.com, 2001.

6.c4 c6 7.de4= de4 8.c5 Be7 9.Nc3 0–0 10.Qc2 (10.Nge2 b6=) 10...Bf5 11.Rd1 (11.Nge2 Qd7+=) 11...Qc7 (11...Qc8 12.Nge2+=) 12.Nge2+= Rd8 (12...a5 13.Ng3 Bg4 14.Rd4+=) 13.Ng3 (13.Rd8 Qd8 14.Ng3 Bg6 15.Nce4 a5+/–) 13...Rd1+= 14.Qd1 Bg6 15.Qc2 (15.Qd4 a5+=) 15...a5 16.Bc4 (16.Nce4!? ab4 17.ab4+=) 16...ab4= 17.ab4 Na6 18.Ba6 Ra6 19.0–0 Nd5 (19...b6!?=) 20.b5 Ra5 (better is 20...Ra8!? 21.b6 Qd8+=) 21.b6+– (21.Nge4?! Qd8+=) 21...Qd8 22.Nd5 (22.Nge4 Rc5 23.Qb3 Be4 24.Ne4 Rb5=+) 22...Qd5?? (22...cd5 23.Qc3 Bf6 24.Qa5 Bb2+–) 23.Qc3 1–0. Baluch,Wieslaw – Weber,Krzysztof, corr 2. AMM, Poland, 1993.

6.c4 c6 7.de4 de4 8.c5 Be7 9.Nc3 Qd1 (9...Be6 10.Qc2=) 10.Rd1 0–0 11.Rd4 Bf5 12.Nge2 Rd8 (12...Bg6 13.Ng3 Rd8 14.Rd8 Bd8 15.f3+=) 13.Ng3 Will e4 fall? (13.Rd8!? Bd8 14.Nd4+/–) 13...Rd4= 14.ed4 Bg6 15.Bc4 Nbd7 16.0–0 (16.b5 Rd8=) 16...Re8 (16...b5 17.Bb3 a5 18.d5+=) 17.Bb3 (17.Re1 b5 18.cb6 Nb6=) 17...Bd8 (17...b6 18.Re1=) 18.d5+= cd5 19.Nd5 Ne5 20.Ba4 Re6 21.Nf4 Re7 (21...Ra6 22.Bb5 (22.Be5?! Ra4 23.Re1 Ng4 24.Ng6 hg6 25.Re4 Ne5 26.Re5 Bf6 27.Re8 Kh7+–; 22.Ng6?! Ng6 23.Bc2 Re6+/–) 22...Bc7 23.Ba6 ba6 24.Ng6 hg6 25.h3+–) 22.Ng6 (22.Re1 Neg4+/–) 22...hg6 23.Re1 Nc4 24.Bc1 (better is 24.Bf6 gf6 25.Ne4+/–) 24...Kf8? (better is 24...Bc7!?+=) 25.Bb5+– Ne5 26.Rd1 (26.Rd1 Bc7 27.Be3+/–; better is 26.Ne4!? Ne4 27.Re4+–) 1–0. Kuperski,Marek – Garbacki,Michal, corr 1AMM Poland, 1991.

6.c4 c6 7.de4= de4 8.c5 Be7 9.Qd8 Bd8 10.Nd2 Nbd7 +=.

6.c4 c6 7.h3 0–0 8.Nd2 Qe7 (8...Bf5 9.cd5 cd5 10.de4 de4 11.g4=) 9.Bf6 Qf6 (worse is 9...gf6 10.cd5 cd5 11.de4 de4 12.Ne4 Bb4 13.ab4 Qe4 14.Qb1+=) 10.de4 dc4 11.Ngf3? (better is 11.Nc4!? Rd8 12.Qc1=) 11...b5–/+ 12.e5 Be5 13.Ne5 Qe5 14.Be2 Rd8 15.0–0 Bf5 16.Nc4 Qf6 (16...Rd1?! 17.Ne5 Ra1 18.Ra1+=) 17.Nd2 Nd7 (17...a5 18.g4 Bg6 19.ba5 Ra5 20.Qc1–/+) 18.Qc1 Ne5 19.Ra2 (19.Nf3 Bd3 20.Ne5 Be2= (worse is 20...Qe5 21.Bd3 Rd3 22.Qc6+/–)) 19...Qg6–/+ 20.Rd1 (20.Kh1!?–/+) 20...Bh3–+ 21.Bf1?? (better is 21.g3–+) 21...Bg2 (better is 21...Rd2 22.Qc6 Nc6 23.Rad2 Rc8–+) 22.Bg2+= Exerts pressure on the backward pawn 22...Rd6 23.Qc2 (23.f4 Nd3 24.Qb1 Re8+=) 23...Qg4 (23...Rd2!? 24.Rd2 Nf3 25.Kf1 Nh2 26.Kg1 Nf3 27.Kf1 Nh2 28.Kg1 Nf3=) 24.f3+= Qg3 25.Kf1 (25.Rf1!? Rg6 26.Rf2+=) 25...Rad8= 26.Qf5?? (better is 26.Raa1=) 26...Nc4–+ 27.Qc5 (27.Qh3 Ne3 28.Kg1 Qh3 29.Bh3 Nd1 30.Ne4–+) 27...Nd2 28.Rdd2 (28.Rad2 Rd2 29.Rd2 Rd2 30.Qf8 Kf8 31.a4 Qf2) 28...Rd2 0–1. Turcot,Jean – Gago,Nelson (1850), Charlesbourg Millenium op, 2004.

6.Nd2 0–0 7.de4 Ne4 8.Ne4 de4 9.Qd4 Qg5 10.Qe4 Nc6 11.Nf3 Qh5 12.Bd3 Bg4 (12...Rd8 13.Rd1+/–) 13.Ng5 (13.h3!? Bf3 14.Qf3 Qf3 15.gf3+/–) 13...g6 14.Bf6 h6 15.h4?? (better is 15.b5 Bf5 16.Qa4 Bd3 17.cd3+=) 15...hg5–/+ 16.hg5?? (better is 16.Qd5–/+) 16...Qh1–+ 17.Kd2 Qa1 18.Ba1 Bf5 19.Qh4 Be5 20.Be5 Ne5 21.Bf5 gf5 22.Qf4 Rfe8 23.Qf5 Rad8 24.Kc3 Ng6 0–1. Pietrzak,Wojciech – Jalowiec,W, Mielec POL, 2000.

6.Nd2 Nbd7 7.c4 ed3 8.cd5 Be5 9.Qb3 Nd5 10.Ngf3 Bb2 11.Qb2 a5 12.Qg7 Qf6 13.Qf6 N5f6 14.b5 Nc5 15.Rc1 (15.Ne5 Bf5 16.Rc1 b6 17.Rc4 Nfd7 18.Nc6 Rg8+=; 15.e4 Be6 (15...b6 16.Ne5 Bb7 17.f3 Rd8 18.Rd1 0–0+=; 15...Bg4 16.Rc1 b6 17.Ne5 Bd7 18.Nd3 Nfe4+=) 16.Rc1 b6 17.e5 Nd5 18.Nd4 Nf4=) 15...b6 16.Ne5 Bf5 17.Rc4 Bg6 (17...Nfd7 18.Nc6 Rg8+=) 18.g4 (18.g3 0–0+=) 18...Rd8 19.Bg2 Rd6 20.Bc6 Kf8 21.f4 h5 22.g5 Ng4 23.Rc5 bc5 24.Nec4 Re6 25.e4 h4 26.h3 Be4 27.Ne4 (27.Be4?! f5 28.hg4 fe4+–) 27...f5 28.hg4 (28.Na5?! fe4 29.hg4 e3+–) 28...fe4 29.Kd2 (29.Na5?! e3+–) 29...h3 30.f5 (30.f5 Rc6 31.bc6+–) 1–0. Geissler,Walter – Kirstein,Hans, BdF, 2004.

6.Nd2 Nbd7 7.c4 ed3 8.Ngf3 0–0 9.Bd3 a5 10.ba5 Qe7 (10...Nc5 11.Bc2 (11.Be2 Be6 12.cd5 Bd5 13.Nc4 Bc4 14.Bc4 Ra5=) 11...Be6 12.Ng5 g6 13.Ne6 fe6 14.cd5 ed5=) 11.Qc2 (11.cd5 Ra5 (11...Nd5 12.Nc4 N7f6 13.0–0 Rd8 14.Rb1 Bc5+/–) 12.0–0 Rd5 13.Qc2 Ne5 14.Ne5 Be5=; 11.0–0 Nc5 12.Qc2 Nd3 13.Qd3 dc4 14.Nc4 Rd8+=) 11...Ra5 (11...Nc5 12.cd5 Nd3 13.Qd3 Ra5 14.Bf6 Qf6+=; 11...Ne5 12.cd5 Nd3 13.Qd3 Ra5 14.Bf6 Qf6+=) 12.Nb3 Ra8 13.cd5 h6 14.Nbd4 Nb6 (14...Nd5? 15.Nf5 Qd8 16.Nh6 Kh8 17.Nf5+–; 14...Ne5=) 15.Nh4 Nbd5 16.Nhf5 Bf5 17.Nf5 (worse is 17.Bf5 Ba3 18.Ra3 Ra3 19.Ba3 Qa3+=) 17...Qe6 18.0–0 Rfd8 19.Nd6 Qd6 (worse is 19...cd6 20.Bc4 Ra5 21.Qd2+/–) 20.Rfe1 Ng4 21.g3 Ne5 22.Bh7 Kh8 23.Bf5?? (better is 23.Red1=) 23...Nf3–/+ 24.Kg2 (24.Kg2 Ne1 25.Re1–/+). Kazimierski,Tomasz (1740) – Lyew,Merrill, IECC, 1999.

6.Nd2 Bg4 7.Be2 Be2 8.Ne2 ed3 9.cd3 Nbd7 10.0–0 0–0 11.Nd4 Ne5 12.N2f3 Qd7 13.Ne5 Be5 14.f4 Bd6 15.Qf3 a5 (15...Rfe8 16.Rac1=) 16.b5 (16.Nb3 a4 17.Na5 Be7 18.Nb7 Qc6+/–) 16...Rfe8 17.Rac1 Re7 18.h3 (18.Qg3=) 18...Rc8 (18...Rae8 19.Rfe1=) 19.g4 (19.Nc2!? Qf5 20.Bf6 gf6 21.Nd4+/–) 19...c6 20.Nf5 Re6 21.Ng7 (worse is 21.Nd6 Qd6 22.f5 Re7=) 21...Kg7 22.g5 cb5 (22...Kg8 23.gf6 Kh8 24.Kh1+=) 23.Rc8+/– Qc8 24.gf6 Kh8 25.Rc1 The mate threat is Rxc8 (25.Rc1 Qe8 26.Qd5+/–; 25.Qd5 Re3 26.Qf7 Rg3 27.Kf2 Rg8+=) 1–0. Pommerel,Wim – Roggensack Hanspach,Peter, corr SOK–91–73, 1991.

6.Be2 0–0 7.c4 c6 (7...dc4 8.de4 Qe7 9.Nc3+=) 8.Nd2 a5 (8...Bf5 9.de4 de4 10.g4=) 9.b5 (better is 9.de4!? Ne4 10.Ne4 de4 11.Qd4+=) 9...Bf5+= 10.cd5 cd5 (10...ed3!? 11.Qb1 Nd5 12.Bd3 Bd3 13.Qd3 Nd7+=) 11.de4= de4 12.Nc4 Bc5 13.Qd8 Rd8 14.Ne5 (14.Bf6!? gf6 15.f3=) 14...Nbd7+= 15.Bc4 (15.Nd7 Nd7 16.g4 Be6+=) 15...Ne5–/+ 16.Be5 Ng4 (16...Rac8 17.Ne2–/+) 17.Bc3 (17.Bf4!?+=) 17...Be3 18.fe3 Ne3 19.Bb3 (better is 19.Be2!? Nc2 20.Kf2–/+) 19...Rd3–+ (19...Ng2?! 20.Kf2 Nf4 21.Rd1+=) 20.Ne2 Bg4 (20...Ng2?! 21.Kf2 Nf4 22.Nf4 Rc3 23.Bd1+=) 21.Rc1 Ng2 22.Kf2 Be2 23.Ke2? (better is 23.Bc4 Nf4 24.Bd3 Bd3 25.Be5–+) 23...Nf4–+ 24.Kf2 Rf3 (24...Rf3 25.Ke1 Rc8–+) 0–1. Ehrlich,Hans Georg (1905) – Geisensetter,Franz (2025), Wesel Undeloh op, 2005.

6.de4 de4 7.Bb5 c6 8.Bc4 =+.

6.de4 de4 7.Nd2 Nbd7 =+.

6.de4 de4 7.Nd2 Bf5 8.c4 c5 9.b5 Nbd7+= 10.Qc2 Ne5 11.f3 (11.Ngf3!? Qe7 (11...Nd3 12.Bd3 ed3 13.Qb3 0–0=) 12.Ne5 Be5 13.Be2= Bb2=) 11...Qe7 12.0–0–0 Bg6 (12...Nd3 13.Bd3 ed3+=) 13.Qc3 (13.Ne4 Be4+=) 13...a6 (13...0–0–/+) 14.Nh3 ab5 15.cb5 c4 16.Nb1? (better is 16.Nc4 Nc4 17.Bc4 Ba3 18.Nf4–/+) 16...0–0?? (better is 16...Nd3 17.Bd3 cd3–+ (17...ed3?! 18.e4–/+)) 17.Rd6+= Nd3 (17...Qd6!? 18.Qe5 Qb6+=) 18.Bd3+/– cd3 19.Rd4?? (better is 19.Rf6 gf6 20.Qf6 Rfc8 21.Kd1 Qf6 22.Bf6+=) 19...ef3 20.Re1? (20.Kd1 fg2 21.Re1–+) 20...Bf5 (20...fg2?! 21.Rc4 Rfe8 22.Nd2+=). Williams,Barry M – Phillips,Rod S, corr NZCCA TT res, 1999.

5.d3 Bg4

6.Be2 Qd7 7.Bf6+/– Be2 8.Ne2 (worse is 8.Ke2 Qg4 9.Kd2 Qg2+=) 8...gf6 9.de4 de4 10.Nbc3 Qd1 (10...f5!?+=) 11.Rd1+/– f5 12.Nd4 Bg7 13.Nd5 Kd8?? (better is 13...Be5+–) 14.Nf5 Be5 (14...Nd7 15.Ng7 Kc8 16.Rd4+–) 15.Nb6 Bd6 (15...Ke8 16.Na8 Rg8 17.f4 ef3 18.gf3+–) 16.Na8 Nd7 17.Rd4 Kc8 18.Ke2 Re8 19.Rhd1 Re6 (19...Nf8 20.Rd6 cd6 21.Nd6 Kd8 22.Ne8 Ke8 23.Nc7 Ke7 24.Nb5+–) 20.Nc7! Kc7 (20...Kc7 21.Rc4 Double attack (21.Rc4 Decoy; 21.Rd6 Remove defender); 20...Bc7 21.Nd6 Double attack (21.Rd7 Pinning; 21.Rd7 Deflection)) 21.Nd6 Rd6 (21...Ne5 22.Ne4 Rc6 23.c3+–) 22.Rd6 Ne5 23.Rf6 1–0. pcmvr (2530) – grazianol (2020), net–chess.com, 2006.

6.Be2 Be2 7.Ne2 c6 8.de4 Ne4 9.0–0 Nd7 10.Nd2 Nd2 11.Qd2 Nb6 12.Qd3 Nc4 13.Bd4 Qh4 14.Ng3 Nd6 15.Rae1 Qh6 16.Bc5 Qg6 17.e4 de4 18.Ne4 0–0–0 19.Ba7 f5 20.Nd6 Bd6 21.Qc3 Bc7 22.Bc5 Rd7 23.f4 Rhd8 24.a4 Rd2 25.g3 h5 26.Re7 h4 27.Qg7 Qg7 28.Rg7 hg3 29.hg3 Rc2 30.Rf2 Rc1 31.Kg2 b6 32.Be7 Rd5 33.Bf6 Re1 34.Rc2 Re6 35.Rf7 Rd7 36.Rf8 Kb7 37.Bg7?? (better is 37.Bc3 Rd5 38.Rf7+/–) 0–1. Reuter,Alfred (1710) – Zoechling,Herbert (1745), KO–011 VCC, 2001.

6.Be2 Be2 7.Ne2 Bd6 8.de4 de4 9.Nd2 Nbd7 10.Ng3 Bg3 11.hg3 c6 (better is 11...Qe7=) 12.g4+/- g5? (better is 12...Rg8 13.g5 Nd5+–) 13.Ne4!+– 0–0 (13...Ne4 14.Qd4 Double attack (14.Bh8 Pinning; 14.Bh8 Deflection; 14.Qd4 Decoy)) 14.Qf3 Ne4 15.Qe4 f5 (15...Re8 16.Qh7 Kf8+–) 16.Qe6 (16.Qe6 Rf7 17.Rh7 Ne5 18.Be5 Qd2 19.Kf1 Qf2 20.Kf2 Kh7 21.Qf7 Kh6 22.Rh1) 1–0. Yarmolyuk,Yury (2150) – Corona,Jose, BI–2011–P–00014, 2011.

6.Be2 Be2 7.Ne2 Nbd7 8.de4 de4 9.Ng3 c5 10.bc5 Qc8 (10...Qe7 11.Nd2=) 11.Bf6+= Nf6 12.Nc3 Bc5 13.Nce4 Be7 14.0–0 Ne4 15.Ne4 0–0 16.Ng3 b6 17.Qe2 Rd8 18.c4 Qe6 19.Rfc1 Rac8 20.a4 Rc5 21.Nf1 Bd6 22.Ra2 Bc7 23.g3 Ra5 24.Rd1 Qe8 25.Rd8 Bd8 26.Qc2 h6 27.Nd2 Qd7 28.Nf3 Bf6 ½–½. Glowatzky,Tihomir – Luzuriaga,Norberto Horacio, email SOK–99–134, 2001.

4.a3 Qh4

5.Nc3 c6 6.d3 Bg4 7.Be2 Be2 8.Nge2 Nf6 9.de4 de4 10.Ng3 Nbd7 11.Qd4 c5 12.bc5 Bc5 13.Qc4 0–0 14.Nce4 Ne4 15.Qe4 Qe4 16.Ne4 Rac8 17.0–0–0+– Rfd8 18.Rd3 Be7+/– 19.Rhd1 Nf8 20.Ng3 g6 21.Rd8 Rd8 22.Rd8 Bd8 23.Ne4 Nd7 24.Nd6 b6 25.Nc8 a6 26.e4 b5 27.f4 f5 28.e5 Kf7 29.Bd4 Bc7 30.Kd2 g5 31.g3 h5 32.Kd3+– h4 33.c4 bc4 34.Kc4 Ke6 35.a4 h3 36.Bc3 gf4 37.gf4 Nf8 38.Kc5 Ng6 39.Nd6 Nf4 40.Kc6 Bb8 41.Kb7 Bd6 42.ed6 Kd6 43.Ka6 Kc6 44.Ka7 Nd3 45.a5 f4 46.a6 Kb5 47.Bf6 f3 48.Bh4 Nc5 49.Kb8 Ka6 50.Kc7 Ne4 51.Kc6 f2 52.Bf2 Nf2 53.Kd5 Ng4 54.Ke4 Nh2 55.Ke3 Ka5 56.Kf2 Ng4 57.Kg3 h2 58.Kg2 Kb5 59.Kh1 Kc5 60.Kg2 Kd4 61.Kh1 Ke4 62.Kg2 Kf4 63.Kh1 Kg5 64.Kg2 Kf5 65.Kh1 Kf4 66.Kg2 Kg5 67.Kh1 Kf5 68.Kg2 Kg6 69.Kh1 Kf6 70.Kg2 Kf7 71.Kh1 Ke6 72.Kg2 Kf6 73.Kh1 Ke5 74.Kg2 Kd6 75.Kh1 Ke7 ½–½. COMP – COMP, 10 minutes, 2002.

5.Nc3 c6 6.d3 Bg4 7.Nge2 ed3 8.Qd3 Nf6 9.Ng3 Nbd7 10.Qd4 Qh6 11.Be2 Be6 12.0–0 Bd6 13.f4 Ng4 14.h3 Ngf6 15.Nce4 Bc7 16.Ng5 Qh4 17.Ne6 fe6 18.Rf3 0–0 19.c4 Nb6 20.cd5 Rad8 21.Ne4 Rd5 22.Nf6 gf6 23.Qe4 Re8 24.Bd4 f5 25.Qc2 Red8 26.Rd1 a6 27.Kh2 Kf7 28.g3 Qh6 29.Rf2 R5d7 30.Bf3 Nd5 31.Rfd2 Qg6 32.Rd3 Kg8 33.Qe2 Nf6 34.R3d2 Nd5 35.Bb2 Bd6 36.Rd3 Qh6 37.e4+/– Nf4 38.gf4 Bf4 39.Kg2 Rd3 40.Rd3 Rd3 41.Qd3 Qh4 42.ef5 Qg3 43.Kf1 Qh3 44.Ke1 Qf5 45.Qd8 Qf8 46.Qd7 e5 47.Be2 Qf7 48.Qd8 Kg7 49.Be5! Be5 50.Qg5 Qg6 51.Qe5 Qf6 52.Qg3 Qg6 53.Bg4 b6 54.Qc7+– Kh6 55.Bf3 c5 56.Qf4 Kg7 57.Be4 Qe6 58.Qc7 Kf6 59.Qh7 cb4 60.ab4 a5 61.ba5 ba5 62.Qh4 Ke5 63.Bd3 Qa2 64.Qe4 Kd6 65.Qd4 Qd5 66.Qb6 Ke7 67.Qc7 Qd7 68.Qc5 Qd6 69.Qg5 Kd7 70.Bb5 Kc7 71.Ke2 Qe6 72.Kd2 Qa2 73.Kc3 Qa3 74.Kc2 Qa2 75.Kd3 Qa3 76.Kd4 Qd6 77.Ke4 Qb4 78.Kf3 Qc3 79.Ke2 Qb2 80.Ke1 Qc3 81.Kf1 Qf3?? 82.Kg1+– Kb6 83.Bf1 Qc6 84.Qd8 Qc7 85.Qf6 Qc6 86.Qb2 Kc7 87.Bb5 Qe4 88.Qc3+– Kb6 89.Bc4 Qe7 90.Qc2 Qe3 91.Kg2 Kc5 92.Bb3 Kb6 93.Ba4 Qg5= 94.Kf3 Qd5 95.Kf4 Qd4 96.Kg3 Qe3 97.Kg4 Qd4 98.Kh3 Qe3 99.Kh4 Qd4 100.Kg3 Qe3 101.Kh2 Qe5 ½–½. COMP – COMP, 2002.

5.Bd4 Nc6=+ 6.Bb5 Nge7 7.Bb2 Qg5 8.Bf1 Bg4 9.f3 Be6 10.Nc3 Bf5 11.fe4 de4 12.Nge2 0–0–0 13.Ng3 Qh4 14.Qe2 Bg6 15.Qf2 Nd5 16.Nge4 Qf2 17.Nf2 Nc3 18.Bc3 Bc2 19.Bc4 Bg6 20.b5 Ne7 21.h4 h5 22.e4 Ng8 23.d3 Nf6 24.Nh3 Bd6 25.Ng5 Rhf8 26.Ra2 Rde8 27.0–0 Kb8 28.Bf6+/– gf6 29.Rf6 Re7 30.Kf1 Bg3 31.Nf3 Rd8 32.Re2 Ree8 33.a4 Rd6 34.Rd6 cd6 35.Bd5 Rc8 36.Rb2 f5 37.Ke2 Bf4 38.a5 fe4 39.de4 Rc5 40.a6 b6 41.Bc6 Rc3 42.Kf2 Bf7 43.Bd7 Kc7+= 44.Bf5 Bc1 45.Rb4 Ba3 46.Rb1 Ba2 47.Rh1 Bc4 48.Bg6 Bb5 49.Bh5 Ba6 50.Bg6+= Kd7 51.h5+/– Rc2 52.Kg3 Rc1 53.Rh2 Ke7 54.h6 Rc8 55.h7 Rh8 56.Rh1 b5 57.Bf5+– Kf8 58.Rh6 Kg7 59.Re6 b4 60.Rd6 Bb5 61.Nd4 a6 62.Rg6 Kf8 63.Ne6 Ke7 64.Nf4 Bb2 65.e5! Bc4 66.Rc6 Bf7 67.e6 Be8 68.Nd5 Kf8 69.Ra6 Kg7 70.Kg4 Bd4 71.Nb4 Bb5 72.Ra5 Bc4 73.Nd5 Be5 74.Kg5 Bd5 75.Rd5 Bf6 76.Kh5 Rd8 77.Rb5 Be7 78.Rb7 Kf6 79.g4 Re8 80.g5 Kf5 81.Re7! Rd8 82.g6 Rd1 83.Rf7 Ke6 84.Rf3 Rh1 1–0. COMP – COMP, 10 minutes, 2002.

4.b5 a6

5.a4 ab5 6.ab5 Ra1 7.Ba1 c6 8.c4 (8.Ne2 Nd7=) 8...Qa5 (8...dc4 9.Bc4 Qg5 10.Bf1=+) 9.Nc3 Bb4 (better is 9...Nf6=+) 10.Nd5?? (better is 10.Ne4 f6 11.cd5 cd5 12.Nc3+/–) 10...Bd2!–+ 11.Ke2 cd5 12.Bg7 Bc3 13.Bh8 Qa2 (13...Qa2 14.Qc2 Qc2; 13...Bh8?! 14.Qd5 Qa2 15.Qd2 Qc4 16.Ke1–+) 0–1. Dumontelle,Joe – Van Rappard, June, 1978.

5.a4 ab5 6.ab5 Ra1 7.Ba1 Bd7 8.c4 c6 9.Qb3 dc4 10.Bc4+= cb5?? 11.Bf7+– Ke7 12.Bg8 1–0. pereira – johanz, internet, 2009.

5.a4 ab5 6.ab5 Ra1 7.Ba1 Nf6 8.c4 c6 9.bc6 bc6 10.cd5 (10.Bf6 Qf6 11.cd5 cd5=) 10...cd5 (10...Nd5 11.Nc3 Nf6 12.Qb1=) 11.Qa4 Bd7 12.Bb5 (12.Qb3 Bc6=) 12...Be7 13.Bf6 Bf6 (worse is 13...gf6 14.Nc3+/–) 1–0. GuestWXQN – pawnsarequeens, freechess.org, 2017.

5.a4 Bd7 6.c4 dc4 7.Bc4 ab5 8.ab5 Ra1–/+ 9.Ba1 Nf6 10.Qb3 Be6? 11.Be6+– fe6 12.Qe6 Qe7 13.Qc8 Qd8 14.Qb7 Be7 15.Bf6 gf6 16.Qe4 Nd7 17.Nf3 Nc5 18.Qf5 Nd3 19.Ke2 Nc5 20.Rc1 Qd7 21.Qh5 Kd8 22.Nc3 Rg8 23.Ra1 Qg4 24.Qd5 Bd6 25.Ra8 Ke7 26.Rg8 (26.Rg8 Qe6 27.Qa8 Qc4 28.Kd1 Qb3 29.Ke1 Qg8 30.Qg8+–) 1–0. valpa – googleforu, playchess.de, 2002.

5.ba6 Na6 6.Ne2 c6 7.Nbc3 Nf6 8.d3 Bf5 9.Ng3 Bg4 10.Be2 Be2 11.Nce2 ed3 12.cd3 Bb4 13.Kf1 0–0 14.Nf5 Ng4?? (better is 14...Ne8=) 15.Bg7+– Re8 16.Neg3 Ne5 (16...Qg5 17.h3 Nf2 18.Kf2 Bd6+–) 17.Be5 Re5 (17...Re6+–) 18.Qg4 Kf8 19.Qg7 Ke8 20.Qe5 (20...Kd7 21.a3+–) 1–0. Trkn – guest1872, ICC, 2004.

4.b5 b6

5.a4 Bb7 6.d3 ed3 7.Bd3 Nf6 8.Nf3 Be7 9.Ng5 Nbd7 10.Qf3 h6 11.Nf7?? (better is 11.Nh3=) 11...Kf7–+ 12.Qg3 Bb4 13.Nc3 d4 14.Qg6 Kf8 15.0–0?? (better is 15.ed4 Nd5 16.Be4 Nc3 17.Bb7 Qe7 18.Kd2–+) 15...Bc3 (< 15...dc3 16.Ba3 Ba3 17.Ra3–+) 16.Ba3 Nc5 17.Bc4 (17.Rad1 Qd5–+) 17...Bd5 (17...Qe8!? 18.Qe8 Ke8 19.Rad1 Na4 20.ed4–+) 18.Bd5 Qd5 19.Rad1 Qg5 (better is 19...Kg8 20.ed4 Na4–+) 20.Qg5 hg5 21.ed4 Kf7 22.d5?? Nce4 23.Rd3 Ba5 24.f3 Nc3 25.Re1 Ncd5 26.c4 Be1 27.cd5 Rh6 28.Bc1 Rah8 29.h3 Rg6 30.Re3 Bb4 31.Re5 Bd6 0–1. CHALY2 – 011jhb, Live Game Caissa's Web, 2004.

5.c4= dc4 6.Qc2 Bf5 7.Ne2+=.

5.c4 dc4 6.Bc4 Qg5 7.Bf1=.

5.c4 Be6 6.cd5+= Qd5 (6...Bd5 7.Nc3+=) 7.f3 (better is 7.Nc3 Qb7 8.Nge2+=) 7...Bb4?? (better is 7...a6+=) 8.Bg7+– f6 (8...Nf6 9.Bh8 Qe5 10.Nc3 Bc3 11.Bf6 Qf6 12.dc3 Qc3 13.Kf2 Qb2 14.Be2+–) 9.Bh8 Qe5 10.Nc3! Bc3 11.dc3 Qc3 12.Kf2 Kf7 (12...Qb2 13.Be2+–) 13.Rc1 Qb2 14.Rc2 Qa3 (14...Qe5 15.fe4 Nh6 16.Nf3 Ng4 17.Ke1+–) 15.fe4 c5 (15...Ke7 16.Nf3 Nd7 17.Nd4+–) 16.Rd2 (better is 16.bc6!? Qa4 17.e5 Ke8+–) 16...Ke7 17.Qh5 (better is 17.e5 Qc3+–) 17...Qb4 (17...h6 18.Nf3 Nd7 19.Be2+–) 18.Qh7 Bf7 19.Nf3 Nd7 (19...c4+–) 20.Rd7! Kd7 21.Qf7 Ne7 22.Bf6 c4 23.Bc4 Rc8 (23...a6 24.Rd1 Kc7 25.Be5 Qd6 26.Bd6 Kb7 27.Qe7 Kc8 28.Be6) 24.Rd1 Kc7 25.Be5 Kb7 (25...Qd6 26.Bd6 Kb7 27.Qe7 Rc7 28.Qc7 Ka8 29.Qc6) 26.Bd5 Rc6 27.Bc6 Kc8 28.Qe6 1–0. marre – popov, internet, 2010.

5.c4 f5 6.Nh3 Be7?? 7.Bg7+– Nf6 8.Bh8 Kf7 9.Bf6 Bf6 10.Nf4 Ba1 11.Nd5 Kg6 12.h4 Be5 13.h5 Kf7 14.Be2 Ke6 15.d4 Bg7 16.g4 Bb7 17.gf5 Kf5 18.Bg4 Kg5 19.f4 Kh6 20.f5 Bd5 21.cd5 Qd5 22.Rf1 Qa2 23.f6 Bf6? 24.Rf6 Kg7 25.Rc6 Nc6+/– 26.bc6 Qa5 27.Nd2 Qb5 28.Bd7 h6 29.Qg4 Qg5 30.Qg5 Kh7?? 31.Qg6 Kh8 32.Be6 a5 33.Qh6 1–0. yannigator (1920) – yeatond, net–chess.com, 2010.

5.c4 Nf6

6.d4 a6 7.cd5 Qd5 8.Ba3+=.

6.d4 Bg4 7.Be2 (7.Qa4 a5=) 7...h5 (7...Be2 8.Ne2 dc4 9.Qa4+=) 8.Nd2 (8.cd5 a6+=) 8...Bb4= 9.Rc1 (9.f3 Be6 10.Rc1 a6 11.ba6 Na6 12.cd5 Qd5+=) 9...dc4 (9...a6 10.a3 Be2 11.Ne2 Bd2 12.Qd2 dc4 13.Qb4=) 10.Rc4 Qd6 (better is 10...Bd2 11.Qd2 a6+=) 11.Ngf3?? (better is 11.Bc3 Bc3 12.Rc3+=) 11...ef3–+ 12.Bf3 Ne4 (12...a6 13.Qa4 Bf3 14.Qb4 Qb4 15.Rb4 Bg2 16.Rg1–+) 13.Be4? (better is 13.Bc1 a6 14.Bg4 hg4 15.Qg4 Nd2 16.Bd2 Bd2 17.Kd2–+) 13...Bd1 14.Ba8? (14.Kd1 Bd2 15.Ba8–+) 14...Ba4 15.a3 (15.Bc3 Bc3 16.Rc3 Bb5–+) 15...Bd2 16.Kd2 Bb5 17.Rhc1 (17.Rc2 c6 18.f3 Nd7–+) 17...Bc4 (17...Bc4 18.Rc4 Qh2–+). Zimmer – Paulitschke, corr, 1980.

6.cd5 Qd5 7.Bf6+= gf6 8.Nc3 Qe5 9.Nge2 (9.Rc1 Ba3 10.Rb1 Bc5+=) 9...Nd7 (9...a6 10.ba6 f5 11.Nf4+=) 10.Ng3 (10.Nf4 a6+=) 10...Nc5 11.Qc2 e4 becomes the focus of attention (11.Bc4 Bb7+=) 11...f5 (11...Bb7 12.Be2+=) 12.Be2 (12.d4 ed3 13.Bd3 Bg7+=) 12...Bb7 13.Nh5 (13.0–0 f4 14.ef4 Qf4+=) 13...0–0–0 14.a4 (14.f3!?=) 14...Nd3–/+ Black plans f4 15.Kf1 Bh6 Black prepares f4 (15...f4 16.Nf4 Nf4 17.ef4 Qf4 18.Ke1–/+) 16.a5 (16.Bd3 ed3 17.Qd1 Rhg8–/+) 16...f4+= 17.g4 (17.ef4 Nf4 18.Nf4 Bf4+=) 17...fg3 (better is 17...f5!?–/+) 18.hg3= Qf5 Threatening mate... how? 19.Rh2 Rhg8 20.ab6 (20.Bd3 ed3 21.Qa4 Rg4=) 20...ab6 21.Ra4 Bd5?? (better is 21...Bg5=) 22.Nd5+– Qd5 23.Nf6 Qc5 (23...Qb7 24.Ng8 Bg5 25.Qa2+–) 24.Bd3 Qc2 (24...Rd3 25.Qc5 bc5 26.Ra8 Kb7 27.Rg8 (27.Rh6?! Ra8 28.Ne4 Rd5+=) 27...Rd2 28.Rh6+–) 25.Bc2 Rg6 (25...c5 26.Ng8 Bg5 27.Rh7+–) 26.Ra8 Kb7 27.Be4 c6 28.bc6 Kc7 29.Ra7 (29.Ra7 Kd6 30.Bg6 hg6 31.Rd7 Kc6 32.Rd8+–) 1–0. Mroz,Antoni – Raszke, corr Poland, 1986.

6.cd5 Nd5!? 7.d3 Bb4 8.Nd2 ed3=.

6.cd5 Nd5!? 7.d3 ed3 8.Qd3 a6=.

6.cd5 Bd6 7.Nc3+/– Bf5 8.f3 (8.Nge2 0–0+=) 8...Qe7 (8...0–0 9.fe4 Ne4 10.Ne4 Be4 11.Qg4+/–) 9.fe4 (9.Bc4 Nbd7+/–) 9...Ne4 10.Nf3 (10.Qf3 Bg6+/–) 10...0–0 11.Be2 (11.Bc4 a6+/–) 11...Nd7 (11...Nc3 12.Bc3 (12.dc3?! Qe3 13.Qd2 Qe4=) 12...a6 13.0–0+=) 12.0–0+/– Ndf6 (12...Nc3 13.Bc3 (worse is 13.dc3 Qe3 14.Kh1 Rae8+=) 13...Be4 14.Qb3+/–) 13.Nd4 (13.Nh4 Bd7 14.Ne4 Ne4+/–) 13...Bg6 (13...Qe5 14.Rf4 Bg6+=) 14.Nf3 (better is 14.Nc6 Qd7 15.Ne4 Ne4 16.Bc4+–) 14...Nc3= 15.Bc3 (worse is 15.dc3 Qe3 16.Kh1 Ne4–/+) 15...Nd5 16.Bd4 (16.Bb2 a6=) 16...Be4 (16...a6 17.ba6 Nb4 18.Qb3=) 17.a4 (17.d3 Bf5 18.e4 Nf4=) 17...Qe6 (17...c5 18.bc6 Nb4 19.d3 Bc6 20.a5=) 18.h3 Qg6 (18...f6+=) 19.Qe1 (better is 19.d3 Bf3 20.Bf3+/–) 19...Nb4+= 20.Nh4 (20.Qd1 Nc2 21.d3 Nd4 (21...Na1 22.de4 Rac8 23.e5+–) 22.de4 Ne2 23.Qe2 Qe4–/+) 20...Qg5 (20...Qe6!?–/+) 21.Nf3= Qd5 22.Qh4 Rae8 (22...Nc2!? 23.Rac1 Ba3+=) 23.Qg4 (23.Ng5 h6 24.Ne4 Re4+=) 23...Bg6 0–1. GuestKVTS – GuestDMPF, freechess.org, 2016.

6.Bf6 gf6 7.Nc3+/–.

6.Bf6 Qf6 7.Nc3 dc4 8.Ne4 Qe5+=.

4.b5 c6

5.a4 Nf6 6.f4 ef3 7.Nf3 Bg4 8.d3 (8.Be2!?=) 8...Be7 (8...Bc5 9.Qd2=+) 9.g3 (9.Be2 Qb6=+) 9...Qa5 10.Nbd2 (10.Qd2 Bb4 11.c3 Bc5=+) 10...Qb6 (10...cb5 11.h3 Bf3 12.Qf3 ba4 13.c4–/+) 11.Bd4 c5 12.Be5 Nbd7 13.Bg2?? (better is 13.Bf4–/+) 13...Ne5–+ 14.0–0 0–0 15.Qe1 Nf3 16.Bf3 Bf3 17.Nf3 d4 (17...Rae8 18.Qd2–+) 18.e4 (18.ed4 Rfe8–+) 18...Rac8 (18...Ng4 19.c3–+) 19.e5 (19.Rb1 Rfe8–+) 19...Nd5 20.Qe4 Ne3 21.Rf2 Qg6 22.Qb7 Bg5 23.Qa7 h5 24.h4?? Bh6 25.Kh2 Ng4 26.Kg2 Nf2 27.Kf2 Be3 28.Kg2 Rfe8 29.b6 Bf4 30.Ng5 Bg5 31.e6 Re6 32.b7 Rce8 33.b8Q Re2 34.Kh1 Rb8 35.Qb8–+ Kh7 36.Rg1 Be3 37.Rg2 Re1 38.Kh2 Qg4 39.a5 Qd1 40.g4 Rh1 41.Kg3 Qg4 0–1. MasterofDisaster – spybraz4, Live Game Caissa's Web, 2004.

5.bc6 Nc6 6.Bb5 (6.Ne2 Nf6+=) 6...Bd7 (6...a6 7.Be2+=) 7.Ne2 a6 (7...Nf6 8.0–0+=) 8.Ba4 b5 (8...Nf6 9.Bb3 Na5 10.Nf4 Nb3 11.ab3=) 9.Bb3= Be6 (9...Qg5 10.Ng3 Nge7 11.Qh5=) 10.Nf4 h6 (10...Qd7 11.Ne6 fe6 12.Qh5 Qf7 13.Qf7 Kf7 14.0–0=) 11.Ne6 fe6 12.Qh5 Ke7 13.0–0 (13.f3 ef3 14.Qf3 Nf6+=) 13...Nf6 14.Qg6 (14.Qe2 Ke8+=) 14...Kd7 (14...Qd6 15.a4 b4 16.a5=) 15.a4 Nb4 (15...Qe8!? 16.Qg3 b4+=) 16.ab5+/– ab5 17.Ra8 (17.Nc3 Qe8 18.Qg3 Nh5+–) 17...Qa8 18.Qf7 Kd6 (better is 18...Be7!? 19.Qg7 Qf8+/–) 19.Bf6 gf6 20.Nc3 (20.Qf6?! Be7 21.Qg7 Qf8+/–) 20...Qb8? (20...Qd8 21.Nb5 Kc5+–) 21.Ne4! (21.Qf6?! Be7 22.Nb5 Kd7+–) 21...de4 22.Qf6 (22.Qe6?! Kc7 23.Qf7 Kb6 24.Qf6 Bd6 25.Qd4 Kc7+–) 22...Qe8 (22...Rh7 23.Qf4 e5 24.Qe4 Ra7 25.Qb4 Kd7 26.Qg4 Kd8+–) 23.Qh8 1–0. Wall,Bill – Titov, internet, 2001.

5.bc6 Nc6 6.Nc3 Nge7 7.Nge2 Rb8 8.Nf4 Qb6 9.Rb1 Qd8 10.Bb5 a6 11.Ba4 Bf5 12.g4 (12.Qh5 d4 13.ed4 g6+=) 12...Bc8 13.Bb3 Ne5 14.h3 (14.Ne4 f6 (14...de4? 15.Be5 Ra8 16.Nh5+/–; < 14...Bg4 15.Be5 Bd1 16.Nd6 Kd7 17.Rd1=) 15.Ng5 Qd6=) 14...Nf3–/+ 15.Kf1 Be6 (better is 15...h5!? 16.Kg2 Qd7 17.Nh5 f5=+) 16.d3= Ng5? (better is 16...h5!?=) 17.h4 (17.de4 h5 18.ed5+– (18.Ncd5?! hg4 19.Ne7 Bb3 20.Qd8 Rd8 21.cb3 Ke7+=; 18.Ne6?! fe6 19.ed5 ed5+–)) 17...Nf3 (better is 17...d4 18.ed4 Bb3 19.hg5 Nd5 20.Nfd5 Bd5 21.Nd5 Qd5+/–) 18.Ne6+– fe6 19.de4 de4 20.Ne4 Qd1 21.Rd1 Ng6 22.h5 Ngh4 23.Be6 b6 24.h6 Rb7 25.hg7 Bg7 26.Nd6 Kf8 27.Nb7 Bb2 28.Bd5 Bf6 29.Bf3 Nf3 30.Rd6 Bc3 31.Rb6 Ne5 32.Ra6 Ng4 33.Ra8 Kg7 34.Ra3 Bb2 35.Ra4 h5 36.c4 Rf8 37.Kg1 Rf2 38.Rh5 Bf6 39.e4 Rb2 40.Rb5?? Bd4 41.Kf1 Rf2 42.Ke1 Bc3 43.Kd1 Ne3 44.Kc1 Rf1# 0–1. Mychess – ChessFiz, #002–#226, 1998.

5.d3 Nf6 6.de4 de4 (better is 6...Ne4 7.Nf3 Bg4=+) 7.Qd8+/– Kd8 8.a4 cb5 9.Bf6 (better is 9.ab5!? Bb4 10.Nd2 Bd2 11.Kd2+=) 9...gf6= 10.ab5 Bb4 11.c3 Bd6 12.Bc4 Be6 13.Ba2 (13.Nd2 f5+/–) 13...Rg8 14.g3 Ba2 15.Ra2 Be5 16.Ne2 Nd7 17.c4 f5 18.0–0 h5 19.Nf4 Bf4 20.ef4 h4 21.Rd1 hg3? 22.fg3 e3 23.Nc3+– Rc8 24.Ra4 Re8 25.Nd5 e2 26.Re1 Re4 27.Kf2 Rcc4? 28.Rc4 Rc4+= 29.Re2 Nc5 30.Nf6 Nd3 31.Ke3 Nc5 32.Rd2 Kc7 33.Nd5 Kb8 34.Ne7?? a6?? 35.Nf5 Rc3 36.Kd4 Rc1 37.Nd6?? Nb3–/+ 38.Kd3 Nd2 39.Kd2 Rc8?? (40.Nc8 Kc8+–; better is 39...Rc7 40.Ke3 Rd7–/+) 0–1. bashful – lovedog, Live Game Caissa's Web, 2004.

5.Ne2 Bd7 6.Nf4 a6 7.c4 ab5 8.cd5 cd5 9.Nd5= Bc6 10.Nf4 Bd6?? 11.Bg7+– Nf6 12.Bh8 Bf4 13.ef4 Nd5 14.Be5 Nd7 15.Qh5 Ne5 16.Qe5 Qe7 17.Qe7 Ne7 18.Be2 0–0–0 19.0–0 f5 20.Rd1 Nd5 21.Nc3 Nf4 22.Bb5 Bb5 23.Nb5 b6 24.Kf1 Nd3 25.a4 Rd5 26.Rdb1 Kb7 27.Nc3 Rc5 28.a5 Ne5 29.a6 Ka7 30.Nb5 Kb8 31.a7 Ka8 32.Ke2 Nc6 33.d4 Rc2 34.Ke3 f4 35.Ke4 Rf2 36.Nc7 (36.Nc7 Kb7 37.a8Q Kc7 38.Rc1 Re2 39.Kf3 Rf2 40.Kf2 Kd6 41.Qc6 Ke7 42.Ra7 Kd8 43.Qd7) 1–0. gtate (1715) – guillermomoad (1745), net–chess.com, 2002.

5.Qh5 Nf6 6.Qe5 Be6 7.h3 Nbd7 8.Qc3 Qb6 9.a4 a5 10.Ne2?? (better is 10.ba6 Bb4 11.Qb3–/+) 10...Bb4–+ (10...cb5?! 11.ab5 Qb5 12.Nd4–/+) 11.Qd4 c5 (11...cb5?! 12.Qb6 Nb6 13.ab5=+) 12.Nf4 (12.Qf6 Nf6 13.Bf6 gf6 14.c3–+) 12...cd4 13.Bd4 Qc7 14.c3 Be7 15.Ne6 fe6 16.Be2 (16.Bf6 Nf6 17.Be2 0–0–+) 16...0–0 (16...e5 17.0–0–+) 17.d3 (17.Bf6 Rf6 18.0–0 Raf8–+) 17...ed3 18.Bd3 Ne4 (18...e5 19.0–0–+) 19.0–0 (19.Be4 de4 20.c4 Bb4 21.Bc3 Qc4 22.Bb4 Qb4 23.Nd2 Nc5–+) 19...Rf7 (better is 19...e5 20.Ra2–+) 20.Be4 de4 21.Nd2 Nc5 (better is 21...e5 22.Ne4 ed4 23.cd4–+) 22.Bc5 Qc5 23.Ne4 Qc4 24.f3 Raf8 0–1. Nylson – ERIK, playchess.de, 2003.

4.b5 Bd7

5.a4 Bc5?? 6.Bg7+– Ne7 7.Bh8 1–0. GuestXZJW – guestfighter, freechess.org, 2017.

5.a4 c6 6.c4 Be6 7.g3 (7.cd5 Bd5 8.d3 Nf6+=) 7...Nh6 (7...dc4 8.Qc2 cb5 9.Qe4–/+) 8.Bg2 Bg4 9.Qc2 Be7?? (9...Bf5 10.cd5 cd5 11.Nc3+=) 10.Nh3?? (better is 10.Bg7 Bf6 11.Bh8 Bh8 12.Nc3+–) 10...Bf6+= 11.0–0 (11.cd5!? cd5 12.0–0+=) 11...Be2–/+ 12.Re1 Bd3 13.Qc1 Bc4 14.Na3 Bd3 (14...Bb3 15.f3 ef3 16.Bf3 Ba4 17.bc6 Bc6 18.Nf4–/+) 15.Bf6 (15.Nf4 0–0–/+) 15...Qf6–/+ (15...gf6 16.Nf4 Qe7 17.Nd3 ed3 18.Qc3+/–) 16.Nf4 Ng4 17.Bh3 (better is 17.Nd3!? ed3 18.f3–/+) 17...Ne5–+ 18.Bg2 0–0 19.Qc3 Nbd7 20.bc6 Rac8 (20...bc6 21.Rec1–+) 21.Qa5 (21.Nd5 Qd6 22.Nb4 Nc6 23.Nd3 ed3=) 21...bc6 22.Qa7 Ra8 23.Qd4 g6 24.Rec1+= Kg7 25.f3 Kh6?? 26.Nc2?? Qd6?? 27.fe4+– Nc5 28.ed5 Nb3 29.Qb2?? Nc1 30.Qc1 g5? 31.Nd3+/– Nd3 32.Qf1 Ne5 33.Be4 cd5 34.Qh3 Kg7 35.Qh7 Kf6 36.Qf5 Ke7+/– 37.Qg5?? f6–/+ 38.Qf5 de4 39.Nd4? Qd5–+ 40.Qh7 Rf7 41.Nf5 Kd7 42.Qh5 Nf3 43.Kh1 Ke6 44.Rb1 Ra6 45.Rb5 Qd2 46.Nd4!+– Nd4 47.Qd5 Ke7 48.Rb7 0–1. Neffgen,Dieter (1740) – Bitterling,Erik (1760), remoteschach.de, 2004.

5.a4 Nf6 6.Ne2 a6 7.Nd4 Bc5 8.Be2= ab5 9.Nb5 c6 10.Bf6 gf6 11.N5c3 f5 12.g3 Na6 13.0–0 Qg5 14.Re1 h5 15.h4 Qg6 16.d4 ed3 17.Bd3= Nb4 18.Qf3 Nd3 19.cd3= 0–0–0 20.d4+= Bb4 21.Rc1+/– Bd6 22.Ne2 Be7 23.Nf4 Qg8? 24.Nd5+– Bh4?? 25.Nb6 Kc7+– 26.Nd5 Kc8 27.Kf1 Bg5+/– 28.Nb6 Kc7 29.Nd7 Rd7 30.Qf5 Rd5?? 31.Qc2 h4+/– 32.Nc3 Rd7 33.d5 c5? 34.Nb5+– Kd8 35.Qc5 hg3 36.Qb6 Ke8 37.Rc8 Bd8 38.Nc7 Ke7 39.Qc5 Rd6 40.Nb5 g2 41.Ke2 Qg4 42.Kd2?? Ba5–+ 43.Kd3 Qf5?? 44.Kc4?? Qc2 45.Kd4 Rh4 (45...Rh4 46.f4 Bb6 47.Nd6 Bc5 48.Rc5 Qb2 49.Rc3 Qa1 50.Nf5 Kd7 51.Nh4 g1Q–+; 45...Rc8?! 46.Qd6 Ke8 47.Qe5 Kd7 48.Qd6 Ke8 49.Qe5 Kd7 50.Qd6 Ke8=) 0–1. mic (2110) – cruciverbalist (2045), net–chess.com, 2008.

5.Nc3 c6 6.d3 Nf6=+ 7.de4 Ne4 (7...de4 8.Qd4 Qe7 9.a4=) 8.Ne4 (8.bc6 bc6 9.Ne4 de4=) 8...de4 9.Bc4 (9.Qd4 Qe7 10.a4 Qb4 11.Bc3 Qd4 12.ed4 Bd6=) 9...cb5 (9...Qe7 10.bc6 Nc6 11.a3=+) 10.Bf7=+ Kf7 11.Qh5 Kg8?? (better is 11...g6 12.Qd5 Be6 13.Qd8 Bb4 14.Qd2 Bd2 15.Kd2 Rd8 16.Bd4 Nc6=+) 12.Qd5 1–0. Wall,Bill – Corvette, internet, 2002.

5.Nc3 c6 6.Nge2 a6 7.bc6 bc6 8.Nd4 Be7 9.Be2 Nf6 10.0–0 (10.d3 c5 11.Nb3 a5 12.de4 de4+=) 10...Bd6 11.Rb1 a5 (11...Qc7 12.h3=+) 12.d3 c5? (better is 12...Qc7=) 13.Ndb5+– d4?? (better is 13...Be7 14.de4 de4 15.Nd6 Bd6 16.Qd6 Qe7+–) 14.Nd6 Ke7 (14...Kf8 15.Nce4 Bc6 16.Bf3+–) 15.Ncb5 (15.Nce4 Kf8 16.Nc5 Bc6+–) 15...de3 (15...Ne8 16.Ne8 Re8 17.de4+–) 16.fe3 Nd5 (16...Bb5 17.Bf6 gf6 18.Nf5 Kf8 19.Rb5 Nc6+–) 17.de4 Ne3 18.Rf7 Ke6 19.Bg4 Ng4 20.Qg4 1–0. 28qaz – RAPTOR, Live Game Caissa's Web, 2004.

5.Nc3 c6 6.Nge2 Nf6 7.a4 =.

5.Nc3 Nf6 6.Nge2 Be7 (6...Bd6 7.Ng3+=) 7.Nf4= Bg4 (7...c6 8.bc6 bc6 9.Be2=) 8.Be2 Be2 9.Nce2 (9.Qe2 Bd6=) 9...0–0 10.0–0 Nbd7 11.Nd4 (11.f3 a6 12.a4 ab5 13.ab5 Ra1 14.Qa1 Nc5=) 11...a6+= 12.ba6 (12.a4 Bd6+=) 12...Ra6 13.Nf5 Ba3 14.Ba3 (14.Qc1 Bc5=) 14...Ra3+= 15.Qb1 b6 (15...Nb6 16.Qb2 Ra5 17.d3+=) 16.Qb2 (better is 16.Qb4 Ra8 17.Ne7 Kh8 18.Ned5 (worse is 18.Nfd5 Re8=) 18...Nd5 19.Nd5+=) 16...Qa8?? (better is 16...Ra5=) 17.Nd5!+– c6 (17...Qd5 18.Ne7 Double attack (18.Qa3 Deflection; 18.Ne7 Decoy; 18.Qa3 Overloading); 17...Nd5 18.Qg7 Mate attack) 18.Nf6 Nf6 19.f3 g6?? (19...Rd8 20.Nh6! gh6 21.Qf6 Kf8 22.fe4 Rd7+–) 20.Ne7 Kg7 21.fe4 (21.Qb6 Re8 22.Qc5 Ra5 23.Qc6 Re7+=) 21...Ra6 (21...h5+–) 22.Qf6 Kh6 23.Nf5 Kh5 24.Qh4 1–0. pcmvr (2100) – gdraper (2010), net–chess.com, 2006.

4.b5 Be7

5.Nc3?? Bf6 6.Nh3 Bh3–/+ 7.gh3 Bc3 8.Bc3 Nf6 9.Bg2 Nbd7 10.0–0 a6 11.ba6 ba6 12.d3 0–0 13.de4 Ne4 14.Be4 de4 15.Kh1? Nc5–/+ 16.Rg1 g6 17.Qh5=+ Ne6?? 18.Qe5+– Re8 19.Qh8# 1–0. 31qaz – DANH, Live Game Caissa's Web, 2004.

5.c4?? dc4?? 6.Bc4?? a6?? 7.a4?? ab5 8.ab5 Ra1 9.Ba1 Bf6 10.Bc3 Bc3 11.Nc3 Nf6 12.Qc2 0–0 13.Nge2 c6 14.bc6 Nc6 15.0–0 Re8 16.Ng3 Qc7 17.Nd5 Nd5 18.Bd5 Bd7 19.Ne4 Rc8? 20.Ng5+– g6 21.Bf7 Kf8 22.Be6 Qd6 23.Bd7 Qd7 24.Rd1 Nd8? 25.Qb2 Kg8 26.Ne4 Qc6 27.Nc3 Ne6 28.Rc1 Rf8 29.Ne2 Qa6 30.Ng3 Ng5 31.h3 h5 32.Rc7 Qf6 33.Qf6 Rf6 34.Rb7 h4 35.Nh1 Ne4 36.d4 g5 37.Rb1 Kf7 38.Rf1 Ke6 39.Ra1 Kf5 40.f3 Nd2 41.Ra5 Kg6 42.Nf2 Nc4 43.Ng4?? Na5+= 44.Nf6 Kf6 45.Kf2 Nc4 46.e4 Ke6 47.Ke2 Nd6 48.Ke3 Nc4 49.Kd3 Nd6 50.Kc3 Nb5 51.Kc4 Na3 52.Kc5 Nc2 53.d5 Kd7 54.d6 Ne3 55.e5? Ng2–+ 56.e6 Ke6 57.Kc6 Nf4 58.d7 Ke7 59.Kc7 Ne6 60.Kc6 Kd8 61.Kd6 Nf4 0–1. valpa – MIGUEL_A, playchess.de, 2003.

5.c4?? Nf6 6.cd5 Qd5 7.Nc3 =.

5.Bg7 Bf6 6.Bh8 Bh8 7.d4 +–.

4.b5 f5

5.c4 c6 6.a4 Nf6 7.Nh3 Bd6 8.Qc2 0–0 9.Be2 Nbd7 10.0–0 (10.d3+=) 10...Ne5 (10...Qc7!?–/+) 11.c5= Bc7 12.f4 Neg4 (12...ef3 13.gf3 Qe8 14.Rf2=) 13.Bd4 h6 14.Nf2 (14.Nc3 Qe7+=) 14...Nf2= 15.Rf2 Bd7 16.Qb3 (16.Nc3 Ng4 17.Rff1 Qh4+=) 16...Kh7 (16...Ba5 17.Nc3=) 17.Nc3 Rg8 18.bc6 (18.d3 ed3 19.Bd3 Ne4 20.Ne4 fe4=) 18...bc6= 19.Qb7 a5 20.Be5 Rc8 21.Rb1 g5 (21...Be6 22.Qc6 Be5 23.Qe6 Bc3 24.dc3=) 22.Qa7 gf4 23.ef4 Be5 (23...Ne8!?+=) 24.fe5+/– Ng4? (better is 24...d4 25.ef6 Ra8+/–) 25.Bg4+– Rg4 26.Rb7 Rg7 27.e6 Ra8 28.Rd7 Qd7 (28...Ra7 29.Rd8 Rae7+–) 29.ed7 (29.ed7 Ra7 30.d8Q+–) 1–0. GuestZNVQ – GuestJPKN, freechess.org, 2017.

5.c4 c6 6.Qh5 g6 7.Qd1 Nf6 8.f3 Bg7 9.fe4 (9.cd5 cd5 10.Nc3 0–0=) 9...fe4 10.cd5 cd5 11.Ne2 Bg4 12.h3 Bd7 13.Nf4? (13.Qb3 0–0+=) 13...Nh5 (13...Ng4 14.hg4 Bb2 15.Nc3 Ba1 16.Qa1+=) 14.Bg7 (14.Qc2!? Bb2 15.Qb2+=) 14...Qh4–/+ 15.Ke2 Ng3 (better is 15...Bb5!? 16.d3 ed3 17.Kd2 Ng7–/+) 16.Kf2+= Nh1 17.Kg1 Nf2 18.Qe2 Rg8 19.Bd4 Nd3 (better is 19...Rf8!? 20.Qf2 Qf2 21.Kf2 g5=) 20.Nd5+/– (20.Nd3?! ed3 21.Qf3 Be6 (21...Bb5? 22.Qd5 Rf8 23.Qb5 Nd7 24.Nc3+–) 22.Bd3 Rf8+=) 20...Rf8? (20...Bb5 21.Nc7 Kd7 22.Nb5 Nc6+/–) 21.Nbc3?? (better is 21.Nc7 Ke7 22.Nc3= (worse is 22.Na8 Rf2 23.Nc3 Re2 24.Be2 Qf2 25.Kh2 Ne1 26.Re1 Qe1–/+)) 21...Rf2= 22.Qd1 (22.Bf6 g5 23.Nc7 Kf8 24.Bg5 Qg5 25.Ne4 Re2 26.Ng5 Rd2 27.Na8 Nb4 28.Nh7 Kg7+–) 22...Bh3+= 23.Ne4? (23.gh3 Qg3 Mate attack) 23...Qe4–+ 24.Nf6 (24.Nc7 Kd8 25.gh3 Rf1 (25...Kc7 26.Qc2 Kd8 27.Qd3 Qd3 28.Bd3+=) 26.Qf1 Kc7–+) 24...Rf6! 25.Bf6 Bf5 0–1. GuestKHNR – jhhhGuestZBFM, freechess.org, 2017.

5.f4 Nf6 6.Ne2 c5 7.bc6 Nc6 8.Nd4 Bd7 (8...Qb6 9.Nb5+=) 9.Be2 (9.Nc6 bc6 10.Be2 Be7+=) 9...Nd4 (9...Be7 10.Bh5 Nh5 11.Qh5 g6 12.Qh6=) 10.Bd4= (worse is 10.ed4 Bd6–/+) 10...Be7 11.0–0 0–0 12.Nc3 Bc6 13.Qe1 a6 14.a4 Rc8 (14...b6 15.Qg3=) 15.Rb1 (better is 15.Qg3=) 15...Qa5?? (better is 15...Qd7=) 16.Bb6+– Bb5 (16...Qb4 17.Rb4 Bb4+–) 17.Ba5 (17.Nb5?! Qb6 18.Nd4 Qc7+=; 17.Bb5?! Qb6 18.Bd7 Nd7 19.Rb6 Nb6+/–; 17.ab5?! Qb6 18.ba6 Qd8 19.ab7 Rb8+–) 17...Be2 (17...Bc6 18.Qg3+–) 18.Qe2 b5 19.ab5 ab5 20.Qb5 Rc5 21.Qb6 Rfc8 22.Qe6 Kf8 23.Rb7 Re8 24.Bb4 Rc3 25.Be7 Re7 26.Qe7 (26.dc3?! Re6 27.Ra1 Re7 28.Re7 Ke7 29.Ra7 Ke6 30.Rg7 h5+–; 26.Re7 Rc2 27.Qf7) 26...Kg8 27.Qg7 1–0. pereira – mngbobo, chesshere.com, 2007.

5.f4 Nf6+= 6.Ne2 Be7+=.

5.f4 Nf6+= 6.h3 Nbd7 (6...Be7 7.Nc3+=) 7.Ne2 (7.g4 h6+=) 7...c5 (7...Nb6 8.Ng3+=) 8.c4 (8.bc6!? bc6 9.Nd4=) 8...dc4–/+ 9.Ng3 (9.a4 a5–/+) 9...Nb6 10.a4 Be6 11.Na3 Qd7 (11...Be7 12.a5 c3 13.dc3+=) 12.Qc2 Now all is on c4 (12.Bf6 gf6 13.a5 Nd5 14.Qh5 Kd8 15.Bc4 Rg8+=) 12...Be7 (12...Nfd5 13.a5 c3 14.Bc3 Nc3 15.ab6+=) 13.Nc4+= Nc4 14.Bc4 Rd8 (14...Bc4 15.Qc4 Rd8 16.Rd1+=) 15.Rd1 b6 (15...Nd5 16.Bd5 (16.Bg7? Bh4 17.Bh8 Ne3–+) 16...Bd5 17.Nh5+= (worse is 17.Bg7 Rg8 18.Nh5 Bh4 19.g3 Qf7 20.gh4 Qh5–+)) 16.d4 (16.d3 Bc4 17.dc4 Qe6=) 16...cd4+= 17.Rd4 (worse is 17.ed4 Bc4 18.Qc4 Nd5–/+) 17...Qc8 18.Rd8 Bd8 19.Bb3 Qc2 20.Bc2 0–0 (20...Kf7 21.Kf2=) 21.Kf2 (21.Ne2 Be7=) 21...Be7 (21...Nd5 22.Nh5 g6 23.Ng7–/+) 22.Ne2 Rc8 (22...Bc5 23.Bf6 Rf6 24.g4=) 23.Rc1 (better is 23.Nd4=) 23...Nd7? (better is 23...Bc5=) 24.Bb3! Nc5?? (24...Bb3 25.Rc3 Double attack (25.Rc8 Discovered attack; 25.Rc3 Decoy)) 25.Be6 (25.Be6 Ne6 26.Rc8 Kf7 27.Bd4+–) 1–0. Luettig,Hendrik – Stritzel,Reinhard, 2000.

5.f4 Nf6 6.Nh3 c5 7.d4 (7.Be2!?=) 7...c4+= 8.Nc3 Bd7 9.a4 Bb4 10.Be2 Qa5 11.Qd2 a6 12.ba6 (12.Nf2 0–0–/+) 12...Ra6 13.Kd1 (13.Nf2 0–0–/+) 13...h6 (13...0–0 14.Nf2–+) 14.Nf2 Be6 (14...b5 15.Rg1–+) 15.Kc1 Nbd7 16.Nfd1 Nb6 (16...0–0 17.Ba3 Ba3 18.Ra3–/+) 17.Qe1 (17.Ba3 Ba3 18.Ra3 Bd7–/+) 17...Bd7 (17...Na4 18.Ra4 Qa4 19.Na4 Be1 20.Nc5–+) 18.Qg3 (18.Ba3 A) 18...Na4?! 19.Bb4 Qb4 20.Ne4+=; B) 18...Ba4?! 19.Bb4 Qb4 20.Ne4 Qe1 21.Nf6 (21.Re1?? Ne4 22.Bf3 Bd7–+) 21...Kf7 22.Re1 Kf6 23.Kd2+=; C) 18...Ba3 19.Ra3 Na4 (19...Ba4?! 20.Ra2+=) 20.Na4 b5–+ (20...Ba4?! 21.Qa5 Ra5 22.Nc3+=)) 18...Kf7 19.h4 h5 (19...Rha8 20.Nb1–+) 20.Qg5 g6 21.Qg3 Na4 22.Qg5? (22.Na4 Bd2 23.Kb1 Ba4–+) 22...Qb6 (better is 22...Nh7 23.Ra4 Ba4 24.Qg3–+) 23.Rh3?? (better is 23.Na4 Ba4 24.Nc3–+) 23...Nb2 24.Ra6 Qa6 25.Kb2 Qa3 26.Kb1 Ra8 0–1. Fischer,A – Merkl,M, corr SOK–89–30, 1989.

5.Nh3 Nf6=.

4.b5 Qh4

5.Ne2 Nf6 6.Be5 c6 7.Nbc3 Nbd7 8.Bg3 Qh6 9.bc6 bc6 10.Rb1 Nh5 11.Bc7 Ba6 12.Nd4 Bf1 13.Rf1 Qg6 14.Na4 c5=+ 15.Nb5 a6 16.Nbc3 d4 17.Nd5 Nhf6 18.Nf6 Nf6 19.Rg1 Rc8 20.Be5 de3 21.de3 Rd8 22.Rb8 Rb8=+ 23.Bb8 Qf5 24.Nc3 Be7 25.Bd6 Qe6–/+ 26.Be7 Qe7 27.Nd5 Nd5 28.Qd5 0–0 29.Ke2 Rd8 30.Qc6 Qh4 31.Re1 Qh5=+ 32.Kf1 Qh2 33.Qe4 h6 34.a4?? Rd2 35.Qe8 Kh7 36.Qe4 g6 37.Qh4 Qh4 38.Kg1 Qf2 39.Kh2 Qg2# 0–1. COMP – COMP, 2002.

5.Ne2 Bg4 6.c4 dc4 7.Qc2 =.

5.Be5 c5 6.Nc3= Be6 7.Nh3 Qe7 8.b6 ab6 9.Nb5 Na6 10.Nd6 Kd8 11.Nf4 Nb4 12.Bb5 Nc6 13.Ne6 fe6 14.Bc6 bc6 15.d4 ed3 16.cd3 Qd7 17.Qg4 Nf6 18.Qf4 Bd6 19.Bd6 Ra3 20.Rb1= Ne8 21.Qg5 Kc8 22.Be5 Qa7 23.Rb3 Rb3 24.ab3 Qa5 25.b4 Qb4 26.Ke2 c4 27.Ra1 cd3 28.Kd3 Rf8 29.f3 Rg8 30.Ke2 h6 31.Qg6+– Qc4 32.Kf2 Qh4 33.Kf1 Qe7 34.Ra8 Kb7 35.Qd3 Nc7 36.Rg8 Ne8 37.Qg6 Qa3 1–0. COMP – COMP, 2002.

4.c4 Bb4??

5.Bg7 dc4 6.Bc4 Be6 7.Qa4 Nc6 8.Be6 fe6 9.Bh8 Qg5 10.Ne2 Qg2 (10...Nf6 11.Bf6 Qf6 12.Nbc3+–) 11.Rg1 Qh2 12.a3 Ba5 (12...Nge7 13.ab4 Kd7+–) 13.Rg8 Ke7 14.Rg7 (14.Ra8?! Qh1 15.Ng1 Qg1 16.Ke2 Qg4 17.Kf1 Qh3 18.Kg1 Qg4 19.Kh2 Qh4 20.Kg2 Qg4 21.Kh1 Qh5 22.Kg1 Qg4 23.Kh2 Qh4 24.Kg1 Qg4=) 14...Kf8 (14...Kd6 15.Ng3 Qg1 16.Ke2 Qg3 17.fg3 Rh8 18.Qe4 a6+–) 15.Qe4 Rd8 16.Qf3 Ke8 (16...Qf4 17.Qf4 Ke8 18.Qf7) 17.Qf7 1–0. Janek – Larry, internet free game, 2017.

5.Bg7 dc4 6.Bc4 Nf6 7.Bh8 Bg4 (7...Qe7 8.Nc3 Nbd7 9.Rb1+–) 8.Qa4 (8.Bf6!? Qf6 9.Qg4 Qa1 10.Qe4 Kf8+–) 8...c6 (8...Nc6 9.Bb5 Kd7 10.Qb4 Qh8 11.Qd4 Kc8 12.Bc6 bc6+–) 9.Qb4 (9.Qb4 b6 10.Qc3+–) 1–0. GuestFJQJ – GuestQLMP, freechess.org, 2016.

5.Bg7 dc4 6.Bh8 +–.

5.Bg7 Nc6 6.cd5 (6.Bh8 dc4 7.Bc4 Qg5 8.Ne2 b5 9.Bb3+–; 6.a3 Be7 7.Bh8 d4 8.ed4 Nd4 9.d3+–; 6.Qc2 Be7 7.Bh8 Nb4 8.Qa4 Bd7 9.Qd1+–) 6...Qd5 7.Nc3 (7.Bh8 Bf5 8.Nc3 Qe6 9.f3+–) 7...Qc5 (7...Qd6 8.Bh8 Bf5 9.Nge2+–) 8.Ne4 (8.Ne4 Qe7 9.Nc3+–; 8.Bh8 Bf5 9.a3+–) 1–0. Eisenhauer,Erik – Martin,Mike, Woerrstadt, 1999.

5.Bg7 Bd2 6.Nd2 Be6 7.Ne2 (7.Bh8 Nc6 (7...Nd7 8.Rb1 Ngf6 9.Rb7 Kf8 10.Qa4 Kg8 11.Bf6 Qf6 12.Qc2 Nc5; 7...Nf6 8.Rb1 Nbd7 9.Rb7 Kf8 10.Qa1 Kg8 11.Bf6 Nf6 12.Qe5 Ng4) 8.Ne2 Nf6 9.cd5 Nd5 10.Ne4 Qe7 11.Nd4 Nd4 12.Bd4 0–0–0; 7.cd5 Qd5 8.Bh8 Nc6 9.Qa4 0–0–0 10.Rd1 Qa2 11.Qa2 Ba2 12.Ne4 Bd5; 7.Qb1 Nf6 (7...Nd7 8.Bh8 Ngf6 9.Qb7 Rb8 10.Qa7 Kf8 11.cd5 Bd5 12.Ne2 c5) 8.Bh8 Nbd7 9.Qb7 Kf8 10.Bf6 Nf6 11.Rb1 Qc8 12.Qb2 Qd8; 7.Qb3 dc4 8.Bc4 Qg5 9.Bh8 Qg2 10.0–0–0 Bc4 11.Qb7 Bd3 12.Qa8 Ke7; 7.Nh3 Nf6 (7...Ne7 8.Bh8 Ng6 9.cd5 Bh3 10.Bc3 Qd5 11.gh3 Nd7 12.Qb3 Qb3; 7...Qd6 8.cd5 Bd5 9.Bh8 Nd7 10.Bd4 0–0–0 11.Nf4 Ngf6 12.Rc1 c5; 7...Nc6 8.Bh8 Qd6 9.Ng5 0–0–0 10.cd5 Bd5 11.Nge4 Be4 12.Ne4 Qb4) 8.Bh8 dc4 9.Bf6 Qf6 10.Ne4 Qe5 11.Nhg5 Nd7 12.f4 Qa5) 7...Nf6 (7...Nd7 8.Bh8 Ngf6 9.Nf4 Qe7 10.Bf6 Nf6 11.cd5 Nd5 12.Ne6 Qe6; 7...Qe7 8.cd5 Bd5 9.Nc3 Bc6 10.Bh8 Nd7 11.Bb5 Bb5 12.Nb5 Nc5; 7...Qd6 8.Bh8 Nd7 9.Qa4 Qc6 10.Qc6 bc6 11.Rb1 Ne7 12.Nf4 Ng6; 7...dc4 8.Bh8 Nf6 9.Nc3 Nbd7 10.Bc4 Bc4 11.Nc4 Qe7 12.Bf6 Nf6) 8.Bh8 Nbd7 9.Nf4 Qe7 10.Bf6 Nf6 11.cd5 Nd5 12.Ne6 Qe6 1–0. pereira – MarceloLipienski, internet, 2011.

5.Bg7 d4 6.ed4 Nf6 7.Qa4 (7.Bh8?! Qd4 8.Bf6 Qf6+–) 7...Nc6 8.d5+– (8.Bh8?! Qd4 9.Bf6 Qf6+=).

5.Bg7 d4 6.Bh8 Nf6+–.

5.Bg7 Qe7 6.Bh8 f6 7.Qh5 Kd8 8.cd5 (better is 8.Qd5 Nd7 9.Qg8 Qe8 10.Qe8 Ke8+–) 8...Bd7 9.Bc4 (9.Nc3 Be8 10.Qd1 Nd7+–) 9...Be8 10.Qh3 (better is 10.Qf5 Bd7 11.Qf4 Bd6+–) 10...Qe5 11.Ne2 (better is 11.Nc3!? Bc3 12.Rb1 Ne7+–) 11...Qa1 12.0–0 Bf7 (12...Ne7 13.Nd4 Nd7+–) 13.Qh7 Qe5 (13...Ke8 14.Qe4 Qe5 15.Qe5 fe5 16.Be5 Nd7+–) 14.Qf7 Qg5 (14...Qe8 15.Qe8 Ke8+–) 15.Nf4 (better is 15.Nd4 Ne7 16.d6 cd6 17.Ne6 Kd7 18.Ng5 d5 19.Bb5 Nbc6 20.Bf6 Re8+–) 15...Bd6 16.Ne6 1–0. GuestGVSR – GuestFNDH, freechess.org, 2017.

5.Bg7 Be7 6.Bh8 f6 (6...Be6+– 7.Qb3 Na6 (7...Nc6 8.Nc3 Nb4 9.cd5 Bd5 10.Nd5 Qd5+–) 8.Bd4 c5 9.Bc3 Qd7 10.cd5 Bd5+–; 6...c6 7.Nc3 Nf6 (7...dc4 8.Qh5 Be6 9.Qh7 Nf6 10.Bf6 Bf6+–) 8.f3 dc4 9.Bc4 b5 10.Bb3 Bf5+–; 6...Nf6 7.Nc3 c6 8.cd5 cd5 9.Rc1 Nbd7 10.Bb5 Kf8+–) 7.Qh5 Kd7 (7...Kf8 8.Qh7 Be6 9.Nc3+– c6 10.cd5 cd5+–) 8.Qd5 Bd6 9.Qf5 Ke8 10.Qh7 Be6 11.Qe4 Kd7 12.Qb7 Nc6 13.Nc3 (better is 13.d4!? Rb8 14.Qa6 Bb4 15.Nd2 Nh6+–) 13...Rb8 14.Qa6 Nb4 (14...Rb6 15.Qa4 Nh6 16.c5 Bc5 17.Bc4+–) 15.Qa4 (15.Qa4 Nc6 16.Nb5+–) 1–0. Buss,Michael – McNeill,James, USCF86CB37, 1986.

5.Bg7 f6 6.Qh5 Ke7 7.Bh8 Qe8 (7...h6 8.cd5 f5 9.Nc3+–) 8.Qh7 Kd8 (8...Qf7 9.Qf7 Kf7 10.a3+–) 9.cd5 a6 (9...Nd7 10.Nc3 Ne7 11.Ne4 Nd5 12.Bc4+–) 10.Be2 Bf8 (10...Qf8 11.Qe4 Nd7 12.Qh7+–) 11.Qg8 Nd7 12.Nc3 Qe5 13.Bg4 Ke7 14.Qh7 (better is 14.Be6 Qh5+–) 14...Kd6 15.Bd7 Bd7 16.Qe4 (better is 16.Ne4 Qe4 17.Qe4 Re8 18.Qb4 Kd5 19.Qd4 Ke6 20.Qf6 Kd5 21.Qd4 Ke6+–) 16...a5 17.Qb1 b6 18.Bf6! (18.Bf6 Qf6 19.Ne4 Ke7 20.Nf6 Kf6 21.Qh7+–) 1–0. Fischer,Detlev – Charisse,F, corr FRG–ch I2021, 1982.

5.Bg7 f6 6.Bh8 d4 7.Qh5 Kd7 (7...Kf8 8.Qh7 Qe7 9.Qg6 de3 10.fe3+–) 8.Qh7 Ne7 9.Bf6 d3 (9...de3 10.fe3 Qf8 11.Bc3+–) 10.Nc3 (10.Qe4 Qf8 11.Qf3 Na6+–) 10...Bc3 11.dc3 (11.Bc3 Ke8 12.Qe4 Bf5+–) 11...c6 (11...Qf8 12.Bg5+–) 12.Rd1 Qf8 13.Bh4 Kd8 (13...Ke8 14.Qe4 Bf5 15.Be7 Be4 16.Bf8 Kf8 17.h4+–) 14.Qe4 Bf5 (14...Ke8 15.Bd3 Bf5 16.Qd4 Bd3 17.Qd3+–) 15.Be7 Qe7 16.Qf5 Nd7 17.Rd3 Kc7 18.Nf3 (18.Qf4 Kb6 19.Qd6 Qd6 20.Rd6 Kc7+–) 18...Rd8 19.Qf4 Kc8 20.Be2 (20.Qd6!? Qe8+–) 20...Rf8 21.Qg4 Kc7 22.Rd7! Qd7 23.Qd7 Kd7 24.0–0 (24.h4!? b6+–) 24...Kd6 25.Rd1 Kc5 26.Ne5 Re8 27.Nd7 1–0. DEFFM – GuestDBBL, freechess.org, 2017.

5.Bg7 f6 6.Bh8 Be6 7.a3 Ba5 8.Qh5 Bf7 9.Qh7+–.

5.Bg7 f6 6.Bh8 Qe7 7.Qh5 Kd7 (7...Qf7 8.Qd5 Qd5 9.cd5 Ne7+–) 8.Qd5 Ke8 (8...Bd6 9.Qg8 Na6 10.Nc3+–) 9.Qg8 (9.Qg8 Kd7 10.a3+–) 1–0. DEFFM – GuestZSFL, freechess.org, 2016.

5.Bg7 f6 6.Bh8 Kf7 7.Qh5 Ke6 (7...Kf8 8.Qh7 Qd7 9.Qg6+–) 8.Ne2 (8.cd5 Kd6 9.Qh7 Qe8+–) 8...dc4 (8...Ne7 9.Nf4 Kd7 10.Bf6+–) 9.Nf4 Kd6 (9...Kd7 10.Qh7 Ne7 11.Bf6+–) 10.Qd5 Ke7 11.Qe4 (11.Qe4 Kd6 12.Bc4+–) 1–0. jaddwarrior (2030) – jo3977, ChessWorld.net, 2012.

5.Bg7 f6 6.Bh8 Nh6 7.Qh5 Nf7 8.Qh7 Be6 (8...Ke7 9.Bg7+–) 9.Qg8 Bf8 (9...Ke7 10.Qd8 Nd8 11.a3+–) 10.cd5 Qd5 11.Bf6 Nd7 12.Be7! Ke7 13.Nc3 Qf5 14.Qg3 Nfe5 15.Nh3 (15.f3 ef3 16.Nf3 Ke8+–) 15...Re8 (15...Nc5 16.Nf4+–) 16.Nf4 (better is 16.Qg5 Qg5 17.Ng5 Nd3 18.Ke2 Bg7 19.Nge4 Bc4+–) 16...Bf7 (16...Nc5 17.Nb5 Kd7 18.Rc1 (18.Na7?! c6+–; 18.Ne6?! Re6 19.Kd1 Rg6+–) 18...Ba2 19.Ra1+–) 17.Rb1 (better is 17.Qh4 Nf6 18.Rb1 b6 19.Ncd5 Bd5 20.Nd5 Kf7 21.Nf6 Qf6 22.Qe4 Re7+–) 17...Nc5 18.Bb5 (18.Be2 Bh6+–) 18...c6 19.Ncd5 Bd5 (19...cd5 20.Be8 Decoy; 19...Bd5 20.Nd5 Combination) 20.Nd5+/– cd5 (20...Kd8 21.Bc6! bc6 22.Qh4 Kc8 23.Nf4+=) 21.Be8 Ke8 22.0–0 b6 23.f3 Bd6? (better is 23...Qe6+–) 24.Qg8 Kd7 25.fe4 Qe4 26.Qg7 Be7 27.Rbc1 (better is 27.d4!? Qe3 28.Kh1 Ned3 29.dc5 Nf2 30.Rf2 Qf2 31.c6 Kc6 32.Qe7 Qa2 33.Qe8 Kc5 34.Qc8 Kd6+–) 27...Ne6 28.Qh8 Bc5 (28...Nc6 29.Qh3+–) 29.Qb8 Nf4? (29...a5+–) 30.Qa7 (30.Rf4?! Be3 31.de3 Qe3 32.Rf2 Qc1 33.Rf1 Qe3 34.Kh1 a5+–) 30...Ke6 (30...Kd8 31.Rf2 Ned3 32.Rc5 (32.Rf4?! Nf4 33.Qb8 Kd7 34.Qb7 Kd8 35.Qb8 Kd7 36.Qb7 Kd8 37.Qb8=) 32...bc5 33.Rf3+– (33.ef4?! Qd4 34.Qb8 Kd7 35.Qb7 Kd8 36.Qb6 Kd7 37.Qb5 Ke7 38.Qb7 Kd8 39.Qa8 Kd7 40.Qa7 Kd8 41.Qa5 Kd7 42.Qb5 Kd8 43.Qb8 Kd7 44.Qb7 Kd8=)) 31.Qg7 1–0. GuestPPCJ – GuestKVTF, freechess.org, 2017.

5.Bg7 Nf6 6.Bh8 d4 7.Qa4 (better is 7.Ne2 de3 8.fe3+–) 7...c6 (7...Nc6+–) 8.Qb4 Na6 (8...de3 9.de3 Qe7 10.Qe7 Ke7 11.Ne2+–) 9.Qa3 (9.Qb2 Kf8+–) 9...Be6 (9...c5 10.Qb2+–) 10.Be2 (better is 10.ed4!? Kd7 11.Bg7 Ne8+–) 10...Kd7 (10...d3 11.Qb2 Nd7 12.Bd1 Bc4 13.Qd4+–) 11.Bf6 (11.Bg7 d3 12.Bd3 ed3 13.Qd3 Ke7 14.Bf6 Kf6 15.Qh7 Ke7+–) 11...Qf6 12.Qb3 (12.Qb2 Kc7+–) 12...Nc5 (12...de3 13.Qb7 Nc7 14.de3 Qa1 15.a3+–) 13.Qb4 (13.Qb2 Rg8+–) 13...b6 (13...de3 14.Qc3 Qf2 15.Kd1 Qg2 16.Qd4 Kc7 17.Qe5 Kd7 18.Qc5 Rg8 19.Qa7 Qh1 20.Qb7 Kd6 21.Qb4 Kd7+–) 14.ed4 (14.Qb2 Nd3 15.Bd3 ed3+–) 14...Nd3 (14...Qd4 15.Qc3 Nd3 16.Bd3 Qd3 17.Qd3 ed3 18.Na3+–) 15.Bd3 ed3 (15...Qd4 16.Be4! Qe4 17.Ne2 Qg2 18.Rg1 Qh2 19.Qa4+–) 16.Nc3 (16.Nf3 c5 17.Qa3 cd4 18.Qd3 Rg8 19.Nd4 Rg2 20.Ne6 Ke6 21.Qd5 Ke7 22.Qg2 Qa1 23.Qe4 Kd6 24.Qd3 Kc7 25.Qh7 Qe5 26.Kd1 Qf6+–) 16...Re8 (16...Qd4 17.Nf3 Qf4 18.0–0–0+–) 17.0–0–0 (17.Nf3 Kc8 18.0–0–0 Rd8+–) 17...Bg4 (17...Qd4 18.Nf3 a5 19.Qb1 Qf2 20.Qd3 Kc7 21.Nd4 Qg2 22.Rdg1+–) 18.Nf3! Bf3 19.gf3 Qf3 (19...Qd4 20.Rde1 a5 21.Qb3+–) 20.d5 c5 (20...Rc8 21.Rde1 Qf6 22.dc6 Rc6 23.Re3+–) 21.Qb5 (21.Qa4!? Kd8 22.Rde1 Re2+–) 21...Kd8 22.Rhe1 Re1 23.Re1 Qe2 24.Ne2 de2 (24...f6 25.Nf4 h6 26.Re8 Kc7 27.Qc6) 25.Re2 Kc7 (25...f5 26.Re8 Kc7 27.Qc6) 26.Qc6 Kd8 27.Re8 1–0. GuestSJSZ – GuestTYTT, freechess.org, 2016.

5.Bg7 Nf6 6.Bh8 Be6 7.cd5 (7.Qb3 Nc6+–) 7...Bd5 (7...Nd5 8.a3 Bd6 9.d3 ed3 10.Nf3+–) 8.Qa4 (8.Nc3 Bc6+–) 8...Nc6 9.Bb5 Qd7 (9...Qd6 10.a3 Bc5+–) 10.Bf6 Be6 (10...Qd6 11.Bc3 Bc5 12.Ne2+–) 11.Bc6 (better is 11.a3 Be7 12.Be7 Ke7 13.Qe4 Rg8+–) 11...Bd2 (11...Qc6 12.Qc6 (12.Qb4?! Qc1 13.Ke2 Bc4 14.Qc4 Qc4 15.Ke1 Qc1 16.Ke2 Qc4 17.Ke1 Qc1 18.Ke2 Qc4=) 12...bc6 13.f3+–) 12.Nd2 bc6 13.Ne2 (13.Qe4 h6+–) 13...Bg4 14.Nd4 (14.Rc1 Be2 15.Qe4 Qe6 16.Ke2 Kd7+–) 14...Qd6 15.Qc6 (better is 15.Ne4 Qd5 16.Nc6+–) 15...Bd7 16.Qd6 (16.Qa8 Bc8 17.Qc8 Qd8 18.Qd8) 16...cd6+– 17.0–0 (17.0–0 d5 18.f3 ef3 19.N2f3+–) 1–0. GuestLBTM – zedifore, freechess.org, 2017.

5.Bg7 Nf6 6.Bh8 Bg4 7.Bf6 (better is 7.Qb3 Nc6 8.a3+–) 7...Qf6 8.Qa4 (8.Qb3!? Qa1 9.Qb4 Na6+–) 8...Nc6 9.Qc2 (9.cd5 Qa1 10.Qb3+/–) 9...Qa1= 10.Be2 (better is 10.cd5 0–0–0 11.Be2 (11.Qe4?? Bd2 12.Kd2 Qb2 13.Kd3 Qb1 14.Kc3 Qe4–+) 11...Be2 12.Ke2 (12.dc6 Rd2 13.cb7 Kb8 14.Qd2 Bd2 15.Ke2 Bc1–+) 12...Rd5 13.Qe4 Qa2 14.Nf3= (14.Qh7 Bd2 15.Kf3 Rg5 16.Nd2 Qd2+=)) 10...Qg7?? (10...Be6 11.f4 Be7 12.c5–/+) 11.Bg4?? (11.cd5 Be2 A) 12.dc6 Qg2 13.Ke2 0–0–0–/+ (13...Qh1? 14.cb7 Rb8 15.Qc7+–); B) 12.Qe4 Ne7 13.Ne2+– (worse is 13.Ke2 f5 14.Qf3 0–0–0+/–; 13.Qb4 Qg2 14.Ke2 Nd5 15.Qb5 Kf8=)) 11...Qg4–/+ 12.g3 0–0–0 13.Qd1 (better is 13.a3!? Ba5 14.f3 ef3 15.cd5–+) 13...Qd1–+ 14.Kd1 dc4 15.Nh3 c3 (15...Bd2 16.Ke2 Bb4 17.Rc1–+) 16.Kc2 cd2 17.Rd1 Ne5 18.Nd2 f5 19.Nf4 Rd2 20.Rd2 Bd2 21.Kd2 Nf3 22.Kc3 Nh2 23.Nh3 Kd7 24.Kd4 Kd6 25.Ng5 (25.Kc3 c5–+) 25...c5 26.Kc4 b6 (26...Ng4 27.Nh3–+) 27.Nh7 (27.Nf7 Ke7 28.Ne5 Ke6–+) 27...Ng4 28.Ng5 a6 (28...Nf2!? 29.Kc3–+) 29.Nh3 b5 30.Kc3 Ne5 31.Nf4 b4 32.Kb3 a5 (32...Nd3!? 33.Nh3–+) 33.Ka4 c4 34.Ka5 b3 35.ab3 cb3 36.Ne2 b2 37.Nc3 Kc5 38.Na4 (38.Ka4 Kc4 39.Nb1 Kd3–+) 38...Kc4 (better is 38...Kd5 39.Nb2 Nc4 40.Kb4 Nb2–+) 39.Nb2 Kc3 40.Na4 Kd2 41.Kb5 Ke2 42.Nc3 (better is 42.Kc5 Kf2 43.Kd5–+) 42...Kf2 43.Kc5 Ke3 44.Kd5 Ng4 45.Ke6 Kd3 (45...Nh6 46.Ke5 Kd3 47.Nd5–+) 46.Kf5? (better is 46.Nd5 Kd4 47.Nf4–+) 46...e3 (better is 46...Ne3 47.Ke5 Nc4 (47...Kc3?! 48.Ke4 Kd2 49.Kf4=) 48.Kf5 Nd6 (48...Kc3?! 49.Ke4 Nd2 50.Kf4=) 49.Kf4 Kc3–+) 47.Nd5= Kd2 48.Nf4 (48.Kg4?? e2 49.Nf6 e1Q–+) 48...Nf2 49.g4 Nd3 50.Ng2 e2 51.g5 Ne1 52.Nf4 Nf3 ½–½. Trkn – Derek, itsyourturn.com, 2000.

5.Bg7 Nf6 6.Bh8 Ng4 7.h3 Nf2 (7...Ne3 8.Qa4 Bd7 9.Qb3 Nf1 10.Qb4+–) 8.Kf2 Qh4 (8...Qg5+–) 9.Ke2 (9.g3!? Qg5 10.cd5 Qd5+–) 9...Bg4 10.Nf3 (10.hg4 Qh1) 10...ef3 11.Kd3?? (better is 11.gf3 Bf3! 12.Kf3 Qh5 13.Kf2 Qd1 14.cd5–+) 11...Bf5 12.e4 Qe4 0–1. lidl4 – Replevin, Live Game Caissa's Web, 2004.

5.Bg7 Nh6 6.Bh8 (6.Bh6?! Qf6 7.Qb3 a5+/–) 6...Be6 (6...dc4 7.Nc3 Kd7 8.Bg7+–) 7.Bc3 (7.Qb3 Na6+–) 7...Nc6 8.Qh5 (8.Bb4 Nb4 9.Qa4 Nc6+–) 8...Bc3 (8...Nf5 9.Qh7 dc4 10.Bb4 Nb4 11.Qh8 Kd7 12.Qb2+–) 9.Nc3 (9.Qh6?! Ba1 10.Qh7 Qd6 11.Qg8 Qf8 12.Qf8 Kf8 13.cd5 Bd5+=) 9...Nb4 10.Rc1 Qf6 11.Nd5 (11.h3 Bf5 12.cd5 Rd8+–) 11...Bd5?? (11...Nd5 12.d4 ed3 13.Bd3 Qb2+–) 12.cd5 0–0–0 13.Bc4 Qb2 14.Qd1 (14.Qh3 Kb8 15.Ne2 Rd6+–) 14...Nd3 15.Bd3 ed3 16.Nf3 Qa2 17.Ra1 Qd5 (17...Qc2 18.Qc2 dc2 19.Ke2+–) 18.Ra7 b6 (18...Kd7 19.Qb1+–) 19.Qa1 (better is 19.Qa4!? Kb8 20.0–0 b5+–) 19...Kd7 20.0–0 Rg8 21.Qd4 (better is 21.Qc3 Rc8 22.Rb1+–) 21...Kc6 (21...Qd4 22.Nd4 Rg5+–) 22.Rc7! Kd6 (22...Kc7 23.Rc1 Double attack (23.Qd5 Deflection; 23.Qd5 Overloading)) 23.Rd7! 1–0. forsetinn (1625) – sampson12, gameknot.com, 2013.

4.c4 dc4

5.Qc2 Bb4?? 6.Bg7 (6.Qe4?! Qe7 7.Qf3 f6=) 6...Bf5 7.Bh8+–.

5.Qc2 Bf5 6.a3 Nd7 (6...a5 7.Bc4 Qg5 8.g3 ab4 9.Bd5+=) 7.Qc4 c6 8.Ne2 Ngf6 9.Ng3 Bg6 10.d4 ed3 11.e4 (11.Bd3? Nb6 12.Qh4 Bd3 13.Bf6 Qf6 14.Qf6 gf6–+) 11...Bd6 12.Bd3 Ne5 13.Be5 Be5 14.Ra2 Qe7 15.Ne2 Bc7 e4 draws heavy fire (15...Rd8 16.Nbc3–/+) 16.f3+= Nd7 17.Qc3 0–0 18.Rd2 a5 19.b5 (19.0–0 ab4 20.Qb4 Qb4 21.ab4 Ne5–/+) 19...a4 (19...Be5 20.Qc4–/+) 20.Qc2+= (worse is 20.bc6 Ba5 21.Qc2 Bd2 22.Nd2 bc6–+) 20...Ne5 21.0–0 (21.bc6 bc6 22.0–0 Rad8+=) 21...Nd3–/+ 22.Rd3 Qe5 23.g3 Qb5 24.Nd4 Bb6 25.Kg2 Qe5 26.Rfd1 Rad8 (26...Rfe8 27.Qb2 Bd4 28.Rd4–/+) 27.Qd2 (27.Qa4 Be4! 28.fe4 Qe4 29.Kf1–+) 27...Rd6 28.Ne2 Rd3 29.Qd3 f5 30.Nec3 (30.Qc4 Bf7 31.Qa4 fe4 32.fe4–+) 30...fe4–+ 31.Ne4 Rf3 (31...Qb2 32.Rd2 Qc1 33.Nbc3 Qg1 34.Kh3–+) 32.Kf3 Bh5 33.Kg2 Bd1 34.Nbc3 Bg4 35.Na4 Bd4 36.Nac3 b5 37.Ne2 Bb6 38.N2c3 Qf5 (38...Qf5 39.h4 Bh3 40.Kh1 Bf1–+) 0–1. Van Rooijen,Peter – Nagley,Tim, IECC, 2000.

5.Qc2 Bf5 6.Qc4 c6 7.g4 Bg6 8.Qe4?? (better is 8.Bg2 Nf6 9.h4=+) 8...Be4–+ 9.Bg7 (9.f3 Bc2 10.Ne2–+) 9...Bg7 10.Ba6 Na6 11.Nf3 Bf3 12.Kf1 Qd3 13.Kg1 Qc4 14.Nc3 Qg4 15.Kf1 Qg2 16.Ke1 Qh1 0–1. Boronka,Joseph – Krasny,Henryk Jan, TKM/SF/01, 2001.

5.Bc4 Nc6 6.a3 Qg5 7.g3 Bf5 8.Nc3 Nf6 9.Nb5 0–0–0 10.h4 Qg4 11.Bf7 a6 12.Bf6 Qd1 (12...gf6!? 13.Nc3 Ne5=) 13.Rd1+= gf6 14.Nc3 Ne5 15.Bd5 Bg4 16.Be4 Bd1 17.Kd1 (< 17.Nd1 Nc4 18.Nf3 Na3=+) 17...Nc4 18.Nf3 Na3 19.Nd5 Rd6 20.Nd4 Nb5 (20...c6!? 21.Nf4 Be7=) 21.Nb5+= ab5 22.Ke2 c6 23.Bf5 Kb8 24.Nf4 h6 25.d4 Be7 26.Rd1 Rg8 27.d5 Kc7 28.e4 Ra8 29.Ne6 Kb6 30.f4 Ra2 31.Kf3 cd5 32.ed5+/– Rd7 33.Nc5 Rd8 34.Nd7 Rd7 35.Bd7 Bb4 36.d6 Rd2 37.Rd2 Bd2 38.Be6 Ba5 39.d7 Kc7+/– 40.Kg4 Be1+= 41.Kf5 ½–½. mafergut – ancientmage, ChessWorld.net, 2002.

5.Bc4 Nc6 6.Qb3 Nh6 (6...Bb4? 7.Bg7 Qg5 8.Bf7 Kd8 A) 9.Bg8 Qg7 10.Bd5 Qg2 11.Bc6 bc6 (11...Qh1?! 12.Qd5 Ke7 13.Qg5 Ke6 14.Qh6 Kf7 15.Qf4 Ke7 16.Qg5 Ke6 17.Qh6 Kf7 18.Qf4 Ke7 19.Qg5=) 12.Qb4 Re8–/+ (12...Qh1?! 13.Qd4 Ke7 14.Qg7 Kd6 15.Qg3 Ke6 16.Nc3+=); B) 9.Bh8 Qg2 10.Qd5 Bd7 11.Bg8 Qh1 12.Qg5 Be7 13.Qg3+–) 7.Ne2 (7.Nc3 Bf5=) 7...Nb4+= 8.Nf4 c6 (8...a6 9.a3 Nc6 10.0–0+=) 9.0–0 (9.a3!? Nd3 10.Nd3 ed3 11.Bd3=) 9...b5+= 10.Be2 Bg4 11.f3 ef3 12.Bf3 Bf3 13.Rf3 Nd5 (13...Qh4 14.Qc3 c5 15.Na3=) 14.a4 (14.Nd5 Qd5 15.Qd5 cd5=) 14...b4+= 15.d3 Ng4 16.Qc4 Qd7 (16...Nge3?? 17.Qc6 Ke7 18.Bd4+–; 16...Nde3?? 17.Qc6 Ke7 18.Qb7 Qd7 19.Qe4 Kd6 20.Qa8+–) 17.Nd2 Be7 18.Nh5 0–0 19.Qd4 Threatening mate: Qxg7 19...Ndf6 20.Qd7 Nd7 21.Bg7 (worse is 21.Ng7 Nge5 22.Nf5 Nf3 23.gf3 Rfe8–/+) 21...Rfe8 22.Ne4 (22.Nc4 Bc5 23.d4 Nb6+=) 22...Rad8 (22...Rab8 23.Bb2 Nge5 24.Rg3 Ng6 25.Rf1=) 23.Rf4 (23.Rc1 c5+=) 23...f5 (23...Ne3 24.Bd4 f5 25.Be3 fe4 26.Rg4 Kf7 27.Rf1 Nf6 28.Bg5+–) 24.Rf5= Ne3 25.Rf3 Bc5 26.Nc5 Nc5 27.Bd4! Rd4 28.Nf6 A double attack 28...Kf7 29.Ne8 Ke8 30.Re3 Kd7 (30...Kd8 31.a5+/–) 31.Rh3 a5 32.Rh7 Kd6 33.Ra7 b3 34.Ra5 Nd3 35.Rb1 b2 36.Ra8 Kc5 37.a5 Ra4 38.Rb8 Kd4 (38...Ra5 39.h4+=) 39.R1b2 (39.Rd8 Kc3 40.Rd3 Kd3 41.Rb2 Ra5 42.Rb3 Kd2+=) 39...Nb2+= 40.Rb2 Ra5 41.Rb4 (41.g4 c5 42.g5 c4–/+) 41...Kd3 42.Rb3 Kc2 (42...Kd4 43.h4+=) 43.Rb7 c5 44.Rc7 (44.g4 c4+=) ½–½. Bonetti,Shane – Perlitz,Heiko, TT–11.18 ETC, 2004.

5.Bc4 Nc6 6.b5 Qg5?? (better is 6...Nb4+= 7.Ba3 (7.Qb3 Be6 8.Be6 fe6 9.Qe6 Ne7 10.Qb3+=) 7...Qg5 8.g3 Be6 9.Bb4 Bc4 10.Bf8+=) 7.bc6+/– Qg2 8.Qh5 Nh6?? (8...Ne7 9.Bf7 Kd8–+) 9.cb7+– Bb7 10.Qb5 Kd8 11.Qb7 Rc8 12.Ba6 Qh1 (12...Qg4+–) 13.Qc8 Ke7 14.Qc7 Ke6 15.Bc8 Kd5 16.Nc3 1–0. Bonetti,Shane – guest1872, ICC, 2002.

5.Bc4 Nf6 6.b5 (--> 1.b4 e5 2.Bb2 e4 3.e3 Nf6 4.b5 d5 5.c4 dc4 6.Bc4).

5.Bc4 Bb4??

6.Bg7 Be6 7.Qa4 Nc6 8.Be6 fe6 9.Bh8 Qd3 10.a3 b5 (10...Ba5 11.Ne2 0–0–0 12.Bd4+–) 11.Qd1 Ba5 (11...Bd6 12.Qh5 Kd7 13.Qh7 Nge7 14.Bf6+–) 12.Qh5 Ke7 (12...Kd7 13.Qh7 Nge7 14.Ne2+–) 13.Qh7 Kd6 14.Nc3 Nge7 (14...Kc5+–) 15.Ne4 Kd5 16.Nf6 Kd6 17.Qd3 (17.Qd3 Nd5 18.Ne4 Ke7 19.Qb5 Rh8 20.Qc6+–) 1–0. Janek – Larry, internet free game, 2017.

6.Bg7 f6 7.Bh8 Nh6 8.Qh5 Nf7 9.Qf7 1–0. katchum (2485) – andrewgb (1930), net–chess.com, 2004.

6.Bg7+– Bg4?? 7.Qg4 Nf6 8.Qf5 Rg8 (8...Qd7 9.Qe5 Qe7 10.Qe7 Ke7 11.Bh8 Nbd7 12.Bf6 Nf6+–) 9.Bf6 Qd6 10.Qc8 1–0. Bonetti,Shane – guest1013, ICC, 2002.

6.Bg7 Qg5 7.Bh8 Qg2 8.Qh5 +–.

6.Qh5 Ne7 7.Qf7 Kd7 8.Bg7 +–.

5.Bc4 Qg5?

6.Ne2! Nf6 7.Qb3! Qg2 (7...Qg6 8.Nf4; 7...Qh5 8.Nf4) 8.Rg1 Qh2 9.Bf7 Kd8 10.Bf6 gf6 11.Nbc3 Qe5 12.0–0–0 Bf5 13.d3 ed3 14.Nf4 Bd6 15.Nd3 Bd3 (15...Qe7 16.e4! Be4 17.Rde1) 16.Rd3 a5 17.f4 Qf5 18.Rd5 Qh3 19.Ne4 Ra6 20.b5 Rb6 21.Qc3 Nd7 22.Ng5! Qh2 23.Ne6 Ke7 (23...Kc8 24.Rd6! Qg1 25.Rd1) 24.Rg7 Qa2 25.Bh5! Ke6 26.f5! Kd5 27.Qd4 1–0. Gilgevich – Woizech, Minsk 1960.

6.Ne2 Qg2–/+ 7.Rg1 Qh2 8.Qb3 Nh6 9.Nbc3 (9.Bd5 Ng4 10.Bf7 Ke7–/+) 9...Nc6 (9...f5 10.d3 Nc6 11.de4–/+) 10.0–0–0 (10.Ne4 Ne5 11.Ng5 f6–/+) 10...Ne5 (better is 10...Qe5–/+) 11.Rh1 Qf2 12.Rdf1 (12…Qg2 13.Nf4+=) +=. St_Jean,Benoit – De Bouver,Guido, corr or01–009 E–mail, 2001.

6.g3 Bb4 7.Qa4 Nc6 8.Bb5 +/–.

6.g3 Nc6 7.h4 (7.a3 Bf5+=) 7...Qg4 (7...Qf5 8.a3+=) 8.Qb3 Nh6 9.b5 (9.a3+=) 9...Nb4 (better is 9...Na5!? 10.Qc2 Nc4 11.Qc4 Qe6 12.Qc7 Bd6=) 10.a3= Nd3 11.Bd3 ed3 12.Qd3 Be6 13.Ne2?? (13.Nc3 Rd8 14.Qe4 Qe4 15.Ne4 Bd5+=) 13...Qf3?? (13...Bc4 14.f3 Qf3 (14...Bd3?! 15.fg4 Ng4 16.Nbc3+=) 15.Qc4 Qh1 16.Kf2 f5 17.Qe6 Be7–+) 14.0–0?? (14.Rg1!? Ng4 15.Rf1+=) 14...Bh3 (better is 14...Bd5 15.Qd5 Qd5–+) 15.Nf4–/+ Bf1 16.Qf1 0–0–0 (16...a6 17.Be5 c6 18.bc6 Qc6 19.Qd1–/+) 17.a4 Rd2?? (better is 17...f6+=) 18.Nd2+– Qg4 19.Qh3 (19.a5 Qd7 20.Nc4 Kb8+–) 19...f6 (19...Qh3 20.Nh3 a6 21.Nf4+–) 20.Qg4 Ng4 21.Ne4 b6 (21...a5 22.Rc1 f5 23.Ng5+–) 22.Kg2 (22.Rc1 Kd7+–) 22...h5 (22...Ne5 23.Rc1+–) 23.Bd4 Be7 (23...a5 24.ba6 c5 25.a5 cd4 26.ab6+–) 24.Ng6 (24.a5 Rh6+–) 24...Re8 25.Ne7 (25.f3!? Nh6+–) 25...Re7 26.f3 Nh6 27.Kf2 f5 (27...Nf5 28.a5+–) 28.Ng5 g6 29.Rc1 Ng8 (29...Rd7 30.Ne6 Nf7 31.Ke2+–) 30.Rc6 Rd7 31.Rg6 Ne7 32.Rh6 Nd5 (32...Rd6 33.Rh8 Rd8 34.Rh5+–) 33.Rh8 (33.Rh5 f4+–) 33...Kb7 34.Rh5 Nb4 (34...c5 35.bc6! Kc6 36.Rh6 Rd6 37.Rh7+–) 35.Ke2 (35.Ne6 Rd6 36.Ng7 f4 37.gf4 Nd3 38.Kg3 c5+–) 35...a5 (35...c5 36.bc6! Nc6+–) 36.Nf7! Rf7 37.Rg5 Nd5 (37...c5 38.bc6! Nc6 39.h5 Nd4 40.ed4+–) 38.h5 Ne7 (38...c5 39.bc6! Kc6 40.Bg7+–) 39.h6 (39.Bg7 Ng8+–) 39...Rh7 40.Bg7 (40.Rg7 Rg7 41.Bg7 c6+–) 40...Ng8 (40...Kc8 41.Bf6 Nd5 42.Rg8 Kb7 43.Bg7+–) 41.Rf5 (better is 41.Bf8 Rh8 42.h7 Nf6+–) 41...Nh6 42.Bh6 Rh6 43.Rf7 (43.Rf4 c6 44.Rh4 Rd6 45.bc6 Rc6+–) 43...Rh2 44.Kd3 Ra2 45.Rf4 Ra4 (45...Ra3 46.Ke2 Ra2 47.Kd1 c5+–) 46.Ra4 1–0. GuestRFSJ – guestkicker, freechess.org, 2017.

6.g3 Nd7 =+.

4.c4 c6

5.a3 a5 6.cd5 A) 6...cd5 7.ba5 (7.Qa4 Bd7 8.b5 Na6 9.Qd4 Nc5 10.Qd5=; 7.b5 Nd7 8.d3 Ngf6 9.Nc3 Be7 10.de4=; 7.d3 ab4 8.de4 de4 9.Bb5 Bd7 10.Qd5+=; 7.Qb3 Nf6 8.Bb5 Bd7 9.ba5 Be7 10.Nc3+=) 7...Nf6 8.d3 Qa5 9.Bc3 Qb6 10.de4=; B) 6...ab4 7.ab4 (7.dc6 Nc6 8.Qc2 Nf6 9.Bb5 ba3 10.Bc6+=; 7.d3 Nf6 8.dc6 Nc6 9.a4 Bf5 10.Nd2+=; 7.Qc2 cd5 8.ab4 Ra1 9.Ba1 Nc6 10.Bc3+=; 7.Qb3 ba3 8.dc6 Nc6 9.Ra3 Ra3 10.Na3+=) 7...Ra1 8.Ba1 cd5 9.Bc3 Nf6 10.d3=.

5.a3 dc4 6.Nc3 +=.

5.a3 dc4 6.Bc4 Nf6 7.h3 (7.Qc2=) 7...Na6 (better is 7...b5!? 8.Ba2 Bd6+=) 8.Qc2 Be6?? (8...Nc7 9.Bf6 Qf6 10.Qe4 Be7 11.d4+=) 9.Be6?? (better is 9.Ba6 ba6 10.Bf6 gf6 11.Qc6 Ke7 12.Qe4+–) 9...fe6+/– 10.Ne2 (10.Bf6 Qf6 11.Nc3 Bd6+/–) 10...Qd6 (10...Bd6!?=) 11.Nbc3 (11.Bf6 gf6 12.Qe4 Nc7+/–) 11...Be7. rommeltdf (1780) – bvdreek, net–chess.com, 2002. (=1.a3 d5 2.b4 e5 3.Bb2 e4 4.e3 c6 5.c4 dc4)

5.a3 Be6 6.cd5 cd5 7.Bb5 Nd7 8.Ne2 a6 9.Bd7 Qd7 10.d3 Be7?? (better is 10...a5!? 11.0–0 Bg4=) 11.de4 (better is 11.Bg7 Bf6 12.Bh8 Bh8 13.d4+–) 11...Bf6 12.Bf6 Nf6 13.e5 Ng4 14.Nd4 (14.Qd4 Qc7+/–) 14...Qe7 (14...Ne5 15.0–0=) 15.Ne6 Qe6 16.h3 (16.Nc3 Rd8+=) 16...Ne5= 17.0–0 0–0 18.Nc3 Exerts pressure on the isolated pawn 18...Rfd8 19.Re1 Rac8 20.Rc1 Nc6 (20...b5 21.Qd2+=) 21.Ne2 Ne7 22.Nd4 Qe5 23.Qd3 g6 24.Nf3 Qf5 25.Qd4 Qe4 26.Qb6 Rb8 (better is 26...Rd7!?+=) 27.Rc7+– Nf5 (27...Re8 28.Rb7 Rb7 29.Qb7+–) 28.Rb7 (28.Rf7 Qe8 29.Rb7 Rb7 30.Qb7 Qb5 31.Qb5 ab5+–) 28...Rb7 29.Qb7 Qe6 30.Rc1 Nd6 (better is 30...Qf6+–) 31.Qa6 1–0. Loulou – Sonea, playchess.de, 2004.

5.a3 Bf5 6.Nc3 A) 6...a5 7.cd5 (7.ba5 dc4 8.Bc4 Nd7 9.d4 Qa5 10.Nge2=; 7.b5 Nf6 8.cd5 cd5 9.Nge2 Nbd7 10.Nd4=) 7...ab4 8.ab4 Ra1 9.Qa1 cd5 10.Qa8+=; B) 6...Nf6 7.cd5 (7.d3 Nbd7 8.cd5 cd5 9.de4 de4 10.Rc1=; 7.Nge2 a5 8.Nd4 Bg6 9.cd5 Nd5 10.b5=) 7...Nd5 8.Nge2 a5 9.ba5 Nf6 10.Ng3+=; C) 6...dc4 7.Qc2 (7.Nge2 a5 8.Ng3 Bg6 9.Nce4 b5 10.Nc5=; 7.Qh5 Qd7 8.Bc4 Nf6 9.Qg5 b5 10.Bb3=; 7.Bc4 Nd7 8.Qb3 Nh6 9.f3 Qh4 10.g3=) 7...a5 8.b5 cb5 9.Nb5 Nf6 10.Bc4=.

5.a3 Bf5 6.cd5 A) 6...Qd5 7.Nc3 (7.f3 Qd8 8.d3 ef3 9.Nf3 Nf6 10.Be2=; 7.Qc2 a5 8.Nc3 Qe6 9.ba5 Bd6 10.d3=) 7...Qd7 8.f3 ef3 9.Nf3 Bd6 10.Nb5+=; B) 6...cd5 7.d3 (7.Ne2 Nf6 8.Ng3 Be6 9.d3 a5 10.de4=; 7.Nc3 Nf6 8.Nge2 Nc6 9.Rc1 Rc8 10.d3=; 7.Bb5 Bd7 8.Be2 Qg5 9.g3 Nf6 10.d3=; 7.Qa4 Nc6 8.Ne2 a6 9.Nbc3 b5 10.Qc2+=) 7...Nc6 8.b5 Nce7 9.de4 de4 10.Nd2=.

5.a3 Bf5 6.Ne2 A) 6...a5 7.b5 (7.Ng3 Be6 8.cd5 cd5 9.ba5 Nf6 10.Bc3=; 7.ba5 Ra5 8.cd5 cd5 9.Ng3 Nh6 10.Qb3=; 7.c5 ab4 8.ab4 Ra1 9.Ba1 Nf6 10.d3=; 7.Nd4 Bg6 8.cd5 Qd5 9.b5 Nf6 10.bc6=) 7...dc4 8.Nd4 Nh6 9.Nc3 Bg6 10.Bc4+=; B) 6...Nf6 7.cd5 (7.Nd4 Bg6 8.cd5 Qd5 9.Nc3 Qd7 10.d3=; 7.Ng3 Be6 8.cd5 cd5 9.d3 a5 10.de4=; 7.Nbc3 a5 8.Nd4 Bg6 9.cd5 Nd5 10.Nd5=) 7...cd5 8.Ng3 Be6 9.d3 a5 10.de4=; C) 6...Ne7 7.Nd4 (7.Ng3 a5 8.cd5 cd5 9.Nf5 Nf5 10.Qa4+=; 7.cd5 Nd5 8.Ng3 Bg6 9.Nc3 Nc3 10.dc3=; 7.Nbc3 a5 8.Nd4 ab4 9.ab4 Ra1 10.Ba1=) 7...Bg6 8.d3 ed3 9.Bd3 Nd7 10.cd5+=; D) 6...Nh6 7.Ng3 (7.Nd4 dc4 8.Qc2 Bg6 9.Bc4 Nd7 10.h4+=; 7.cd5 cd5 8.Nbc3 Nc6 9.Ng3 Bg4 10.Qa4+=; 7.Nf4 dc4 8.Bc4 b5 9.Be2 a5 10.ba5=) 7...Bg4 8.Qc2 a5 9.b5 Nd7 10.bc6+=; E) 6...dc4 7.Ng3 (7.Nd4 Bg6 8.Bc4 Nf6 9.0–0 Bd6 10.f3=) 7...Bg6 8.h4 h5 9.Bc4 Nd7 10.Qc2=.

5.a3 Nf6 (--> 4.a3 Nf6 5.c4 c6).

5.a4 Qb6 6.b5 cb5 (6...Nd7 7.Nc3 Ngf6 8.a5=) 7.ab5 (7.cd5 Ne7+=) 7...a6 (7...dc4!? 8.Ra4 Bf5 9.Rc4 a6=) 8.Nc3 (8.cd5 Bf5+/–) 8...Nf6 (8...dc4 9.Bc4 Nf6 10.Qc2+=) 9.Nd5 (9.Qc2 Bf5+=) 9...Nd5 10.cd5 Bc5 (better is 10...Nd7!?+/–) 11.Bg7+– Rg8 12.Bc3 Nd7 (better is 12...Bd7+–) 13.Bc4?? (better is 13.d3!? Nf6 14.ba6 Nd5 15.Qa4 Kf8 16.ab7 Ra4 17.bc8Q Ke7 18.Ra4 Qb1 (18...Rc8?! 19.Re4 Kd7 20.Bd2=) 19.Kd2 Rc8–+) 13...Bd6 (13...Rg2 14.Ne2 Bd6+/–) 14.Nh3 (better is 14.Qc2 Nc5 15.g3+/–) 14...Qc5 (14...Qc5 15.Ra4 Nb6+/–) 0–1. GuestNTFZ – GuestKING, freechess.org, 2016.

5.a4 Be6 6.cd5 cd5 7.Ne2 Bb4?? (better is 7...Nf6 8.b5 Bd6+=) 8.Bg7+– 1–0. Hal1958 – Sonea, playchess.de, 2004.

5.a4 Nf6 6.b5 (--> 1.b4 e5 2.Bb2 e4 3.e3 Nf6 4.b5 d5 5.c4 c6 6.a4).

5.Qa4 Bd7 6.Nc3 c5? (better is 6...Nf6=) 7.b5+– d4 (7...Bf5 8.g4 d4 9.gf5 dc3 10.Bc3+–) 8.Ne4 de3 (8...Na6+–) 9.de3 Qe7 (9...Nf6 10.Nf6 gf6 11.Nf3+–) 10.Nc3 (10.Be2 Qe4 11.Bf3 Qf5 12.Bb7 Na6+–) 10...Nf6 11.0–0–0 (11.Nf3 Na6+–) 11...Qe6 (11...Qd8 12.Nf3 Be7 13.e4+–) 12.Nd5 (12.Nf3 Bd6+–) 12...Nd5 13.Rd5 f6 14.Ne2 Be7 (14...Na6 15.Rd2 Qf7 16.Qc2+–) 15.Nf4 Qe4?? (15...Qb6+–) 16.Bd3 Qd5 1–0. DEFFM – herculanum, freechess.org, 2018.

5.Qa4 Nd7 6.c5 White gains space (6.cd5 Nb6 7.Qc2 cd5= (worse is 7...Qd5 8.Nc3 Qd7 9.Ne4+/-)) 6...Ngf6 7.Nh3 (7.d4 b5 8.Qd1 a5=) 7...Be7 (7...a5 8.Bd4=) 8.Be2 (8.d4 0–0=) 8...0–0 9.0–0 Black's piece can't move: c8 (9.Nf4 g5 10.Nh5 Nh5 11.Bh5 Bf6+=) 9...Qc7 (9...a5 10.Bd4+=) 10.d3 (10.Nf4 b6 11.cb6 Nb6+=) 10...ed3-/+ 11.Bd3 Ne5 12.Be5 (better is 12.Be2!?-/+) 12...Qe5–+ 13.Nd2 Bh3 14.gh3 Qg5 15.Kh1 Qh4 16.Kg2 (16.Qc2 a5 17.ba5 Ra5–+) 16...Bc5! 17.Nf3 (17.bc5 Qa4) 17...Qb4 18.Qc2 Bb6 19.Rg1 Ne4 (19...Qd6 20.Rad1–+) 20.Kh1 (20.Rab1 Qe7 21.Be4 de4–+ (21...Qe4?! 22.Qe4 de4 23.Nd2-/+)) 20...Qe7 21.Rg2 (21.Be4 de4 22.Nd2 Rfe8–+) 21...Rfe8 (21...Qf6!? makes it even easier for Black 22.Qd1–+) 22.Rag1 g6 23.h4 Rad8 24.h5 Qf6 25.Be2? (25.Ng5 Ng5 26.Rg5 Kf8–+) 25...Kg7 (25...Qf5 and Black can already relax 26.Qd1 Qh5 27.Qb3–+) 26.h4 (26.Bd1 Kf8–+) 26...d4 27.hg6 (27.ed4 Bd4 28.Rf1 Nc3 29.Nd4 Qh4 (worse is 29...Qd4 30.Bg4–+) 30.Rh2 Qd4–+ (worse is 30...Rd4 31.Bf3 Qf4 32.Qc3=)) 27...hg6 28.h5 (28.ed4 otherwise it's curtains at once 28...Bd4 29.Bd1–+) 28...d3! 29.Qb3 (29.Bd3 Qf3) 29...Rh8 30.Ne5 de2 31.Ng6 Rh5 32.Nh4 Kh8 0–1. Weigel,Hans Juergen (1955) – Braun,Gottfried (2230), EU–chT Seniors, 2001.

5.Qb3 dc4 6.Qc4 A) 6...Qe7 7.a3 Bf5 8.Ne2 Nf6 9.Ng3 Bg6 10.d4=; B) 6...Qd5 7.Qc2 (7.Qd5 cd5 8.Nc3 Nf6 9.Nb5 Kd8 10.a3= ; 7.f3 Qc4 8.Bc4 f5 9.Bc3 b5 10.Be2=; 7.a3 Qc4 8.Bc4 b5 9.Bb3 a5 10.ba5=) 7...Bf5 8.Nc3 Qd6 9.Nf3 ef3 10.Qf5=; C) 6...f5 7.d3 (7.a3 b5 8.Qc2 a5 9.a4 ab4 10.ab5= ; 7.d4 Bd6 8.Nc3 Nf6 9.a3 b5 10.Qb3+=; 7.Nh3 b5 8.Qb3 Qd6 9.Bd4 a5 10.ba5=) 7...Nf6 8.de4 b5 9.Qb3 fe4 10.Nc3=; D) 6...Bf5 7.Ne2 Nf6 8.Nd4 Bg6 9.Be2 Bd6 10.0–0+=.

5.Qb3 dc4 6.Bc4 A) 6...Nh6 7.Qc2 (7.d4 b5 8.Be2 Be6 9.Qc3 a5 10.ba5= ) 7...f5 8.Nh3 b5 9.Be2 Qd7 10.a3=; B) 6...Qe7 7.Qc2 (7.a4 Nd7 8.f3 Nb6 9.fe4 Nc4 10.Qc4+=; 7.b5 Nf6 8.d3 ed3 9.Nd2 Nbd7 10.bc6=; 7.Bd4 b5 8.Be2 Qg5 9.Bf1 Be6 10.Qb2+=) 7...Nd7 8.Nc3 Ngf6 9.Nge2 b5 10.Bb3=.

5.b5 cb5 6.cb5 Nf6 7.d3 Bb4 8.Nd2 0–0 9.Be2 a6 10.a4 ab5 11.ab5 Ra1 12.Ba1 Qa5 13.de4?? (better is 13.Bf6!? gf6 14.Nh3+= (14.de4?? de4 15.f3 Rd8–+)) 13...de4 (13...Bd2 14.Qd2 Qa1 15.Qd1 Qc3 16.Kf1 de4 17.g3–+) 14.f3?? (better is 14.Bd4–/+) 14...Bd7 (14...Bd2 15.Qd2 Qa1 16.Kf2 ef3 17.gf3–+) 15.Nh3?? (better is 15.Bf6 gf6 16.fe4 Bb5 17.Bb5 Qb5 18.Ngf3=) 15...Bh3 16.gh3 ef3 17.Bf3 Qb5 18.Be2? Qc6 19.Bf3 Bd2 20.Qd2? Qf3 21.Rf1 Qh3 22.Rh1 Qh4 23.Kf1 Ne4 24.Qg2 g6 25.Be5 Nc6 26.Bg3 Qf6 27.Ke1 Qc3 28.Ke2 Qd2 29.Kf3 Qg2 30.Kg2–+ Ng3 31.hg3 Rb8 0–1. Valpa – Aidogael, playchess.de, 2005.

5.b5 dc4 6.Bc4 Qg5 7.Bf1 Nf6 8.Nc3 Bf5 9.d3 ed3 10.Nf3 Qg4 11.Bd3 Bd3 (11...Qg2? 12.Rg1 Qh3 13.Rg3+–) 12.Qd3 Qg2 13.0–0–0 Nbd7 14.bc6 bc6 (14...Qf3 15.cd7 Kd8 16.Nd5 Nd5 17.Qd5 Qd5 18.Rd5+/–) 15.Ne4 Qg4 (15...Qf3 16.Bf6 Ba3 17.Qa3 Nf6 (17...gf6? 18.Nd6 Kf8 19.Nf5 c5 20.Qd3+–) 18.Nd6 Kd7 19.Nf7 Ke8 20.Nh8 Ne4+–) 16.Nf6 Nf6 17.Bf6 gf6 18.Nd4 Be7 (18...Rc8 19.Rhg1 Qh5 20.Nc2=) 19.Rhg1 (19.Nc6? Rc8 20.Qd5 Qe6 21.Qe6 fe6–+) 19...Qd7 20.Qc2 Rc8 21.f4 Ba3 22.Kb1 Rb8 23.Nb3 Qc7 24.Rd4 Be7 25.Rc1 c5 26.Rd5 Qc6 27.Rcd1 Kf8 (27...c4!?–/+) 28.Kc1 Qa6 (28...c4 29.R1d4 Ke8 30.Na5+=) 29.Re1 (29.Nc5 Qa3 30.Kd2–+) 29...c4+= 30.Nd2 Rg8 31.Rd4 Rg6 (31...Rg2!? 32.Kd1 Bb4+= (32...Rh2?! 33.Rc4 Rd8 34.Re2 Rh1 35.Re1 Rd2 36.Kd2 Bb4 37.Rb4 Rh2 38.Kd1 Rc2 39.Kc2–/+)) 32.Nc4= (32.Qc4 Rc8 33.Kb2 Qa3 34.Ka1 Rc4 35.Rc4 Rg2 36.Rc8 Kg7–+; 32.Rc4?! Rg2=) 32...f5 33.Kd1 Rc8 34.Qd3 Qa2 35.Qc2?? (better is 35.Nd2!?–/+) 35...Qc2 (better is 35...Qa1 36.Qc1 Qc1 37.Kc1 Bf6–+) 36.Kc2 Rg2 37.Kd3 Rh2 38.Rd7 Ke8 39.Rd5 h5 40.Rg1 Kf8 41.Rf5 f6 42.Ne5 Bd8 43.Nf3 Rh3 44.Nd4 Rb8 (better is 44...a5!?–/+) ½–½. Tiedemann,Joern (1810) – Kapfenstein,Armin (2125), RSS7E adv–18, 2005.

5.b5 Be6 6.Qb3 Nf6 7.d3 ed3 8.Bd3 dc4 9.Bc4 Bc4 10.Qc4 Bd6 11.Nf3 0–0 12.0–0 Qc7 (better is 12...a6!?=) 13.Bf6+/– gf6 14.Qg4 Kh8 15.Nc3 Rg8 16.Qf5 Be5 17.Ne5 Qe5 18.Qb1?? (better is 18.Qd3+/–) 18...Qc3–+ 19.Rc1 Qe5 20.bc6 Nc6 (20...bc6?! 21.Qb7 Qd5 22.e4 Qe4 23.g3=) 21.Qb7 Qg5 (21...Rg2 22.Kg2 Qd5 23.Kf1 Qd3 24.Ke1 Rg8–+) 22.Qc6+– Rac8 ½–½. cmulligan (2255) – islanderfan (2000), net–chess.com, 2011.

5.b5 Be6 6.Nc3 Nf6 7.Nge2 Bb4 =.

5.b5 Be6 6.cd5 Bd5 (6...cd5 7.Nc3+=) 7.Nc3= Nf6 8.Rc1 Be7 9.Nd5 cd5 10.Qc2 (10.Nh3 0–0+=) 10...Nbd7= 11.Bf6 (11.Ne2!?=) 11...Nf6–/+ 12.Qc7 Qc7 13.Rc7 b6 14.Ne2 Bc5 15.a4 0–0 16.g3 a6 17.Nc3 a5 18.d4 Bb4 (18...ed3 19.Bd3 Rac8 20.Rc8 Rc8 21.Ne2=) 19.Bh3+= Rab8 20.0–0 Bd6 21.Rc6 Bb4 22.Rf6 gf6 (better is 22...Bc3!? 23.Rd6 Rfd8+=) 23.Nd5+– Kg7 24.f3 (24.Bf5!? Rfe8+–) 24...Rfe8 25.fe4 Re4 26.Rf3 (26.Rf6?! Re3 27.Rb6 Re1 28.Kf2 Rb6 29.Nb6 Re4+=) 26...Rbe8 (26...Ree8 27.Nf6 (27.Rf6?! Bd2+=) 27...Red8 28.Nh5 Kg6 29.Nf4 Kg7 30.Bf5+/–) 27.Bf5 Bd6?? (better is 27...R4e7+/–) 28.Be4+– Re4 29.Rf6 Be7 (29...Bb4 30.Kf2 Re8 31.Rb6+–) 30.Rb6 Bg5 (30...Bb4 31.Rb8 Re6 32.b6+–) 31.Kf2 Bd8 (31...Re8 32.Ra6 Rb8+–) 32.Rb8 White prepares the advance b6 32...Bg5 33.b6 f5 34.b7 Kf7 35.Rc8 (35.Rc8 h6 36.b8Q Be7 37.Rh8 Ke6 38.Rh6 Kf7 39.Rh7 Ke6 40.Re7 Kd5 41.Qb5 Kd6 42.Qc5#) 1–0. Maci – Phileas, playchess.de, 2005.

5.b5 f5 6.Nc3 Nf6 7.cd5 cd5 8.Nge2 Nbd7 9.Nf4 (9.Nd4 Nc5=) 9...Nb6 10.Qb3 Now all is on d5 10...Qd6 11.a4 (11.Nce2 g5 12.Nh5 Be7=) 11...Be6 (better is 11...d4!? 12.Nd1 d3+=) 12.a5+= White launches an attack 12...Nbd7 13.Ba3 Qe5 14.d4 ed3 15.Nd3 Qc7 16.Nf4 Bf7 17.Bf8 (17.Ncd5? Nd5 18.Bf8 Nf4–+) 17...Nf8 18.Bd3 (better is 18.b6!? ab6 19.Ncd5 Nd5 20.Bb5 Nd7 21.Nd5+=) 18...d4+= 19.Ncd5 Nd5 20.Nd5 Qd6 21.Bc4 Ng6 (better is 21...Rd8 22.Nb6 Ne6+=) 22.a6 (22.ed4?! Rc8 23.Ne3 Bc4 24.Nc4 Qd4 25.Qe3 Qe3 26.Ne3 0–0=) 22...b6 (22...Rd8 23.ab7 Ne5 24.Ra6+/–) 23.Nb6 Qb6 (23...Bc4!? 24.Nc4 Qe6+/–) 24.Bf7+– Ke7 (24...Kf8 25.Qd5 Rd8 26.Qe6 Qb5 27.Bg6 hg6 28.Rd1=) 25.0–0 de3 26.Rae1 Kf6 (26...f4 27.Bd5 Rac8 28.fe3+–) 27.Re3 Ne5?? (27...Nf4+–) 28.Re5! Ke5 Decoy theme: e5 29.Re1 1–0. Brinkmann,Wilhelm – Leisebein,Peter, corr SOK–89–35, 1989.

5.b5 Nf6 (--> 1.b4 e5 2.Bb2 e4 3.e3 Nf6 4.b5 d5 5.c4 c6).

5.Qc2 Be6 6.Nc3 Nf6 7.Rc1 (7.cd5 cd5 8.a3 a5 9.ba5 Ra5+=) 7...Be7 (7...Bb4!? 8.cd5 cd5–/+ (8...Bd5?! 9.Nd5 Qd5 10.Bf6 gf6 11.Rb1=)) 8.a3 0–0 (worse is 8...dc4 9.Ne4 b5 10.Bf6 Bf6 11.d3 cd3 12.Nf6 Qf6 13.Bd3=) 9.cd5 cd5 10.f3 Nc6 11.Bb5 (11.fe4!? d4 12.Nd1+=) 11...Rc8 12.Bc6 Rc6 13.Nge2 ef3 14.gf3 Rc4 15.Qd3 a5 16.b5 Bc5 17.Nf4 Nd7 18.Nce2 (18.Ncd5 Ne5 19.Qc4 Nc4 20.Rc4 Bd5 21.Rc5 Bf3–/+; 18.Nfd5? Ne5 19.Qe2 Bd5 20.Nd5 Rc1 21.Bc1 Qd5–+; 18.Ne6 fe6 19.Qe2 Qe7+=) 18...Qh4 19.Kd1 Rc1 20.Nc1 Bd6 21.Bg7 (worse is 21.Nd5 Nc5 (21...Bh2? 22.Nf4+–) 22.Qc3 f6–/+) 21...Kg7 22.Qd4 Kh6 23.Ne6 Qd4 24.Nd4 Ba3 25.Nd3 Rg8? (better is 25...Kg5=) 26.Nf5+– Kh5 27.Nf4 (27.Nf4 Kg5 28.Rg1 Kf5 29.Rg8+–) 1–0. Vasut,Karel (2155) – Nepomucky,Ondrej (2140), CZE–chT2d, 2005.

5.Qc2 Nf6 6.a3 Bf5 (6...Bd6 7.Nc3+=) 7.d4 (better is 7.Ne2!? Bd6 8.c5=) 7...Nbd7 8.h3 (8.Nc3 a5 9.b5 Be7=) 8...h5 (8...Bd6 9.Nc3–/+) 9.Nd2 h4 (9...Be7 10.Ne2+=) 10.Ne2 Be7 11.0–0–0? (better is 11.Nc3=) 11...a5–+ 12.c5 ab4 13.ab4 Bh7 (13...Qc7 14.Nf4–+) 14.Nc3–/+ b6 (14...Nf8 15.Be2–/+) 15.Nb3 (15.b5 bc5 16.bc6 Nb8+=) 15...0–0–/+ 16.Be2 Qb8 17.Kd2 bc5 18.bc5 Qb4 19.Ra1 Rab8 (19...Bg6 20.Ra8 Ra8 21.Ra1+=) 20.Bd1 (20.Ra3!?=) 20...Qb7–/+ 21.Ba3 Ra8 22.Be2 Rfb8 23.Rhb1 Qc7 24.Ke1 Nf8 25.Bb2 Ra1 26.Ra1 Qb7 (26...Bf5 27.Ra4–/+) 27.Bd1 Ne6 28.Qe2 Qc7 29.Ra6 Bg6 30.Na5 Nd8 31.Na4 (31.Ba3!? Bh5 32.Qf1 Bd1 33.Kd1+=) 31...Bh5–/+ 32.Qf1? (better is 32.Qd2–/+) 32...Bd1–+ 33.Kd1 Rb4 34.Bc3?? (34.Kc2 Ra4 35.Bc3–+) 34...Rb1 (34...Rb1 35.Ke2 Rf1 36.Kf1 Qh2–+) 0–1. Maksic,D (2195) – Bogosavljevic,B (2505), 2nd Gligoric Cup, 2014.

5.Qc2 Nf6 6.cd5 cd5 (worse is 6...Qd5 7.Bf6 gf6 8.Nc3+/–) 7.Bf6 Qf6?? (better is 7...gf6 8.a3 a5+=) 8.Qc8+– Ke7 (8...Qd8 9.Bb5 Nd7 10.Bd7 Ke7 11.Qb7+–) 9.Qb7 Nd7 (9...Kd8 10.Qd5 Kc8 11.Qa8+–) 10.Nc3 (10.Qa8?! Qa1 11.Bb5 Qb1 12.Ke2 a6 (12...Qa2?? 13.Qb7+–) 13.Qa6 d4 14.ed4 Qb4 15.Bd7 Kd7+–) 10...Qe5 11.Nd5 (better is 11.Qa8 Qb8 12.Qd5 Nf6+–) 11...Ke6 (11...Kd6 12.Bb5 Qa1 13.Ke2+–) 12.Nf4 (12.Rc1 Rb8 13.Qa7 Qd6+–) 12...Kf6 (12...Ke7 13.Rc1 Rb8 14.Qa7+–) 13.Rc1 Bd6 (13...Nb6 14.Rc7 Rd8 15.Rf7 Kg5 16.h4 Kh6 17.Qc6 Rd6 18.g4 Qf4 19.g5 Kg6 20.Qe8 Qf7 21.Qe4 Qf5 22.Qe8 Qf7 23.h5 Kf5 24.Qf7 Rf6 25.gf6 Ke5 26.fg7 Bg7 27.Qe7 Kd5 28.e4 Kc6 29.b5#) 14.Qd7 Rhd8 15.Qg4 (15.Qb7 Rab8 16.Qa7 Ra8+–) 15...g6 16.Qh4 (better is 16.Nge2!? Bb4 17.Rc6 Kg7+–) 16...Kg7 17.Ngh3 (better is 17.d4 Bb4 18.Kd1 Qa5+–) 17...Bb4 18.Nd3 Bd2 (18...Rd3 19.Bd3 Combination; 18...ed3 19.Qb4 Pinning (19.Qb4 Deflection; 19.Qb4 Clearance)) 19.Kd1?? (19.Kd2 Qa5 20.Ke2 Qa2 21.Kd1 Qa4 22.Kd2 Qb4 23.Kd1 Qa4 24.Ke1 Qa5 25.Kd1 Qa4=) 19...Bc1–+ 20.Ng5 (20.Kc1 Rdc8 21.Kd1 Qa1 22.Kd2 Qa2 23.Ke1 Qb1 24.Nc1 Qc1 25.Ke2 Rc2#) 20...h5 (better is 20...Be3 21.Qh6 Kh6 22.Nf7 Kg7 23.Nfe5 Bd4–+) 21.Ne4 (21.Kc1 Rac8 22.Kb1 Rb8 23.Kc2 ed3 24.Bd3 Rb2 25.Kd1 Rd3 26.Ke1 Qc3 27.Kf1 Rd1#) 21...Rd3?? (better is 21...Rac8 22.Rg1 f5 23.Qf6 Qf6 24.Nf6 Kf6–+) 22.Bd3+– (22.Kc1?? Rc8 23.Nc3 Qc3 24.Kb1 Rd1#) 22...Rc8 (22...Be3 23.Ke2 Bb6+/–) 23.Ke2 Bb2 (23...Qe6 24.Rd1+–) 24.f4 (better is 24.Rb1!? Rb8+–) 24...Qd5 25.Bb1 (25.Qe7 Qa2 26.Kf3 Qd5+–) 25...Qc4 (25...f5 26.Qe7 Kh8 27.Rd1 Qc4 28.Kf3 fe4 29.Be4+–) 26.Kf3 (26.Kf2 Rc6 27.Rd1 Re6+–) 26...Qd5 (26...Qe6 27.Rd1+–) 27.Qe7 Rc6 (27...a5 28.Qd6 Rd8 29.Qb6+–) 28.Qb7 Kh6 (28...Ba3+–) 29.Qb2 f5 (29...Kh7+–) 30.Qh8 1–0. Couspeyre,Thierry – Dumitriu,Laurentiu, ZL–2012–0–01197, 2012.

5.Nc3 Bb4 6.Ne4 A) 6...f6 7.cd5 (7.Nc3 Ne7 8.Qh5 g6 9.Qf3 Bf5 10.a3=; 7.a3 Ba3 8.Nf6 Nf6 9.Ra3 Be6 10.c5=) 7...Qd5 8.Nc3 Qe6 9.Qh5 g6 10.Qh4+=; B) 6...Bf8 7.cd5 (7.Nc3 Nf6 8.cd5 Nd5 9.Nd5 Qd5 10.Nf3=; 7.Ng3 Nf6 8.cd5 Nd5 9.Nf3 Nd7 10.Be2=) 7...Qd5 8.Nc3 Qd8 9.Bc4 Nf6 10.Qb3=.

5.Nc3 dc4 6.a3 Nf6 7.Qc2 (7.Bc4 b5 8.Ba2 a5 9.Nge2 Bd6 10.Qc2+=; 7.Qb1 Bf5 8.Nge2 Bd6 9.Nd4 Bg6 10.Bc4+=) 7...Bf5 8.Bc4 Nbd7 9.Nf3 ef3 10.Qf5 =.

5.Nc3 dc4 6.Bc4 A) 6...Nf6 7.b5 (7.Qb3 Qd7 8.f3 b5 9.Be2 a5 10.ba5=) 7...Bf5 8.Nge2 a6 9.Qb3 Qd7 10.b6=; B) 6...b5 7.Be2 (7.Bb3 Nf6 8.Qc2 Bf5 9.a3 a5 10.ba5+=; 7.Bf1 Nf6 8.a4 Bb4 9.ab5 cb5 10.Bb5+=) 7...Nf6 8.Qc2 Bf5 9.a4 Na6 10.Na2=.

5.Nc3 dc4 6.Ne4 A) 6...b5 7.Nf3 (7.Qf3 Ne7 8.Be5 Nd5 9.Qg3 Nd7 10.Nf3+=; 7.a3 a5 8.ba5 Ne7 9.Nf3 Bf5 10.Ng3=; 7.a4 Na6 8.ab5 cb5 9.Ra6 Ba6 10.Qa1=; 7.Qh5 Nd7 8.a4 Ngf6 9.Qf3 Bb4 10.ab5=) 7...a5 8.ba5 Bf5 9.Ng3 Be6 10.Nd4+=; B) 6...Qe7 7.Qc2 (7.Qf3 Nh6 8.a3 Be6 9.d3 cd3 10.Bd3=) 7...b5 8.Bc3 Na6 9.a3 Bf5 10.Nd6=.

5.Nc3 f5 6.a3 A) 6...a5 7.b5 (7.ba5 Nf6 8.cd5 cd5 9.Rc1 Ra5 10.Nb5=) 7...Nf6 8.d3 Be7 9.de4 fe4 10.cd5+=; B) 6...Nf6 7.d3 (7.cd5 cd5 8.Nb5 Kf7 9.d3 a5 10.de4=; 7.Rc1 dc4 8.Bc4 Nbd7 9.d4 Nb6 10.Ba2=) 7...Be7 8.cd5 cd5 9.Rc1 Nc6 10.de4=; C) 6...Ne7 7.d3 (7.cd5 Nd5 8.d3 a5 9.b5 Be6 10.de4=; 7.Nh3 dc4 8.Bc4 Ng6 9.d4 b5 10.Bb3+=; 7.Rc1 dc4 8.Bc4 b5 9.Be2 a5 10.ba5=) 7...a5 8.b5 Be6 9.de4 fe4 10.cd5+/–; D) 6...dc4 7.Bc4 (7.Qh5 g6 8.Qd1 Nf6 9.Bc4 b5 10.Be2=) 7...Nf6 8.d4 b5 9.Bb3 a5 10.ba5=.

5.Nc3 f5 6.Qb3 A) 6...Ne7 7.d3 (7.Rd1 a5 8.b5 Be6 9.d3 Nd7 10.de4=; 7.cd5 Nd5 8.Nd5 Qd5 9.Qd5 cd5 10.a3=) 7...a5 8.b5 Nd7 9.de4 Nc5 10.Qd1=; B) 6...Nf6 7.Rc1 (7.d3 dc4 8.dc4 Qe7 9.a3 a5 10.b5=; 7.cd5 cd5 8.a3 a5 9.ba5 Ra5 10.Rc1=; 7.Nh3 Na6 8.a3 Nc7 9.d3 Bd6 10.Be2=; 7.Rd1 Be6 8.d3 Qe7 9.de4 de4 10.a3=) 7...Na6 8.a3 Nc7 9.cd5 Nfd5 10.Nd5=; C) 6...Qd6 7.cd5 Nf6 8.dc6 Nc6 9.Nb5 Qe7 10.a3+=; D) 6...dc4 7.Bc4 Nh6 8.f3 b5 9.Nb5 a5 10.Nd4=.

5.Nc3 f5 6.cd5 cd5 (worse is 6...Bb4 7.Ne4 Qd7 8.Ng5+– Qe7 9.Qh5 g6 10.Qh4+/–; 6...Nf6 7.dc6 Nc6 8.a3 Be6 9.d3 ed3 10.Nf3+/–) 7.Bb5 (7.Rc1 Nf6 8.Nb5 Na6 9.a3 Be7 10.Ne2+=; 7.a3 Nf6 8.Nb5 Kf7 9.d3 a5 10.de4=; 7.Qh5 g6 8.Qd1 Bg7 9.Qc1 d4 10.Nb5+=; 7.Qa4 Nc6 8.b5 Nce7 9.Nge2 Nf6 10.d3=; 7.Nb5 Nc6 8.Nh3 Nh6 9.a3 a6 10.Nd4=) 7...Bd7 8.Nge2 (8.a3 Nf6 9.d3 a6 10.Bd7=) 8...Nf6 (8...Bb4 9.Bd7 (9.Qb3 Bb5 10.Nb5+=) 9...Qd7 10.Nd5+=) 9.Qb3 (9.Nf4 d4 10.ed4=) 9...Nc6 (9...Bb5 10.Nb5=) 10.Bc6 (10.Nd5!? Nd5 11.Qd5 Nb4 12.Qe5 Be7 13.Ng3 Nc2 14.Ke2 Na1 15.Nf5 Bb5 16.Qb5 Qd7 17.Ng7 Kd8 18.Qd7 Kd7 19.Ba1=) 10...bc6+= (10...Bc6 11.b5; worse is 10...Bc6 11.b5 Bd7 12.Nd5 Nd5 13.Qd5+/–) 11.0–0 Bd6 12.Na4 Bh2?! (12...Qe7 13.Nc5 (13.a3); 12...Rb8 13.a3 c5–/+) 13.Kh1?? (better is 13.Kh2 Ng4 14.Kg3+=) 13...Ng4 (13...Bd6!?–+) 14.g3–/+ Qg5 15.Kg2 Qh6 (15...h5!? 16.Qc3 h4 17.Qg7 Qg7 18.Bg7 Rh7+=) 16.Rh1= 0–0 17.Nc5 Be8 18.Nf4 g5 (18...Bf7 19.Qc3 a5 20.ba5+=) 19.Nh3 (19.Nfe6 Rf7+/–) 19...f4 20.ef4 (20.Rh2? f3 21.Kg1 Nh2–+) 20...gf4 21.Rh2 f3 22.Kg1 Nh2 23.Kh2 Bg6 (23...a5 24.a3=) 24.Qe3 (better is 24.g4 Rfd8 25.Qe3 Qe3 26.de3+=) 24...Qh5?? (better is 24...Qe3 25.de3 a5 26.ba5 Ra5=) 25.Qd4+– Qh6 26.g4 Be8 27.Qe5 Rd8 28.Ne6 Bd7 (28...Qf6 29.Nd8 Qe5 30.Be5 Bd7+–) 29.Qh8 (better is 29.g5 Qg6 30.Nd8 Rd8 31.Nf4+–) 29...Kf7 30.Neg5 (30.Nd8!? Ke7 31.Nc6 Bc6 32.Qe5 Qe6 33.Qe6 Ke6 34.Ng5 Kd6 35.Nh7 Rb8+–) 30...Ke7 31.Qe5 Be6 32.Bd4 (32.b5 Rc8 33.d4+– (33.Ne6?! Qe6 34.Qe6 Ke6=)) 32...Kd7+/– 33.Kg3 Rg8? (33...Bg8!?+/–) 34.b5 (better is 34.Bc5 Bg4 35.Kg4+–) 34...Qg6?? (34...cb5 35.Bc5 Bg4 36.Kg4 Qc6 37.Qf5 Kc7 38.Qh7 Qd7 39.Qd7 Rd7+–) 35.bc6 (35.Ne6?? Qg4 36.Kh2 Qg2; 35.Qe6?! Qe6 36.Ne6 Ke6 37.Nf4 Kd7+/–) 35...Kc8 (35...Ke8 36.Nf4 Qg5 37.Qe6 Qe7 38.Qg8 Qf8 39.Qe6 Qe7+–) 36.Rb1 1–0. Nilsson,S – Oskarsson,Torsten, Helsingborg Sweden, 1963.

5.Nc3 Bf5 6.cd5 cd5 7.Nge2 (7.Qa4 Nc6 8.b5 Nb8 9.Nge2 Nf6 10.Nd4=; 7.Rc1 Nf6 8.a3 Nc6 9.Nge2 Rc8 10.d3=; 7.a3 Nf6 8.Bb5 Nc6 9.Nge2 a6 10.Ng3=; 7.f3 Nc6 8.b5 Nb4 9.a3 Nd3 10.Bd3=) 7...Nf6 8.Nd4 Bc8 9.Qa4 Nbd7 10.Rc1 =.

5.c5 a5!? 6.a3 ab4 7.ab4 Ra1 8.Ba1 Nf6 +=.

5.c5 b6 6.Bd4 (6.d3 bc5 7.de4 cb4 8.ed5 Nf6=) 6...Na6 (6...Nd7 7.Qa4 Bb7 8.Qb3–/+) 7.a3? (better is 7.Qa4!? b5 8.Qb3=) 7...bc5–/+ 8.bc5 Nc5 9.Qc2 Qb6 (9...Qd6 10.f3–/+) 10.f3 f5 (10...Nf6 11.Nc3 Bf5 12.Rc1–/+) 11.fe4 fe4 12.g3 (12.Nc3 Nh6–/+) 12...Nh6 13.Nc3 Qc7 (13...Nf5 14.Rb1 Qa5 15.Bb5 Nd4 16.ed4 cb5 17.dc5–/+) 14.Na4 (better is 14.Rc1!?–/+) 14...Na4 15.Qa4 Nf5 16.Bc3 Bd6 17.Ne2 0–0 18.Bh3 (18.Bg2 Qb6–+) 18...Bd7 (18...Ne3!? 19.de3 Bh3 20.Nf4–+) 19.Bf5 Bf5 20.Rg1 Bh3 21.Nf4 Rf7?? (better is 21...Bg4–+) 22.Nh3+/– Raf8 23.0–0–0 Qe7 24.Nf4 Ba3 25.Kc2 Rb8 26.Ra1 Bc5 27.Qc6 Rf6?? 28.Qd5 Kh8 29.Bf6 (29…Qf6 30.Rgc1+– (30.Qc5? Qb2 31.Kd1 Qa1 32.Ke2 Qg1–+; 30.Qe4 Qb2 31.Kd3 Rb3 32.Ke2 Re3 33.Qe3 Be3 34.Ke3 g5+–)) 1–0. maaxa – al2004, Live Game Caissa's Web, 2004.

5.c5 Be6 6.Ne2 Nd7 7.Nf4 Qe7 (7...Ngf6 8.Nc3=) 8.Be2 Ngf6 9.Ne6 (9.Nc3 g5 10.Ne6 Qe6=) 9...Qe6= 10.0–0 0–0–0 (10...a5!? 11.a3 Be7=) 11.Na3+= h5 12.h3 (12.Nc2+/–) 12...g6? (better is 12...Rh6!?+=) 13.Nc2+– Rg8 14.d3 (14.Nd4!? Qe8+–) 14...Bg7 (14...Ne5 15.Nd4 Qe8 16.a4+/–) 15.de4 (15.Nd4!? Qe8 16.b5+–) 15...Ne4+= (worse is 15...de4 16.Nd4 Qd5 17.Qc2+–) 16.Bg7 Rg7 17.Nd4 Qe7 (17...Qf6 18.a4+=) 18.Bd3 (better is 18.Rc1 Ne5 19.b5 cb5 20.Bb5+–) 18...Nef6? (18...Ne5 19.Qc2 Nd3 20.Qd3+=) 19.Nf3?? (better is 19.b5 Nc5 20.bc6+–) 19...Re8 20.a4 Ne5 21.Ne5 Qe5 22.b5 Ne4 23.Be4+/– Qe4 24.Qd4?? Qd4+= 25.ed4 Re2 26.Rfe1 Re1 27.Re1 Kd8 28.f4 f5 29.Kf2 Re7 30.Re7 ½–½. Hal1958 – Sonea, playchess.de, 2004.

5.c5 Be6 6.Ne2 Nf6 7.Nf4 Qd7 8.Bf6 gf6 9.Ne6 fe6 10.d4 Qf7 11.Be2 Nd7?? (better is 11...Kd8=) 12.Bh5+– (12…Qh5 13.Qh5 Kd8 14.0–0+–) 1–0. hal1958 – Sonea, playchess.de, 2004.

5.c5 Bf5 6.Ne2= Nf6 7.Nd4 Bg6 8.Be2 Be7 9.0–0 Nbd7 10.a4 (10.Nc3 0–0=) 10...a6 (10...a5 11.b5 Qc7 12.Qc2+=) 11.Nb3 0–0 12.d3 (12.a5!?=) 12...ed3 13.Bd3 Qc7 (13...a5 14.Bg6 fg6 15.Qd4–/+) 14.Bg6+= fg6 15.N1d2 (15.Nd4 Kf7 16.a5 Ne5+=) 15...Rae8 (15...a5 16.Na5 Nc5 17.bc5 Qa5 18.Bd4+=) 16.h3 Bd8 17.Nf3 Ne4 18.Nbd2 (18.Qc2 Bf6=) 18...Bf6 (18...a5!?–/+) 19.Bf6 gf6 (19...Ndf6 20.Ne4 Ne4 21.Rc1+=) 20.Ne4= Re4 21.Rb1 (21.Qb3 a5 22.Nd4 f5+=) 21...Rfe8 (21...a5!?–/+) 22.Nd2 R4e7 23.Qb3 Kg7 24.Nf3 Ne5 25.Nd4 Nc4 26.Qc3 b5 (26...Qd7!?=) 27.ab5+= ab5 28.Ra1 Qb7 29.Ra2 Ra8 30.Ra8 Qa8 31.Ra1 Qb7 (31...Qe8 32.Ra2+=) 32.Ra2 Re8?? (better is 32...Kf7+=) 33.Qa1+– Re7 34.Kf1 (better is 34.Ra6!? Ne5 35.f4+–) 34...Ne5 35.Ke2 Kf7 36.Ra6 Rc7? 37.Rb6?? Qc8+/– 38.Qa6 Qa6 39.Ra6 g5 40.g3+– h5? 41.f4 gf4 42.gf4 Nd7 43.Rc6 Rc6 44.Nc6 Ke6 45.Nd4 Ke7 46.Nb5 1–0. Hal1958 – Sonea, playchess.de, 2004.

5.cd5 Qd5 6.Nc3 Qe6 =.

5.Ne2 Bb4?? 6.Bg7 Nf6 7.Bh8 Bg4 (7...dc4 8.Nbc3+– Nbd7 9.Nd4 Ne5 10.Bf6 Qf6 11.Ne4 Qg6 12.Qc2 b5 13.Qb2 Qe4) 8.h3 (8.a3 Bd6 (8...Na6 9.Qc2 Bd6 10.Nbc3 Nc5 11.Nd4 Ne6 12.cd5 Nd4 13.Qa4 Nd5; 8...Be7 9.h3 Be2 10.Be2 dc4 11.Nc3 Nbd7 12.0–0 b5 13.Qc2 Nc5) 9.h3 Bh5 10.cd5 Nbd7 11.g4 Bg6 12.dc6 bc6 13.Nbc3 Ne5; 8.cd5 Nbd7 (8...Na6 9.Qc2 cd5 10.Nf4 Be7 11.Ba6 ba6 12.Nc3 Be6 13.0–0 Rc8) 9.Qc2 cd5 10.Nbc3 Rc8 11.h3 Be6 12.Nd4 Kf8 13.Be2 Kg8; 8.Qc2 Nbd7 9.cd5 cd5 10.h3 Rc8 11.Nbc3 Be6 12.Nd4 Kf8 13.Be2 Kg8; 8.Qa4 Na6 (8...Be7 9.cd5 Nbd7 10.Ng3 cd5 11.Nc3 Kf8 12.Bf6 Bf6 13.Qb4 Kg8) 9.Nd4 Bd7 10.cd5 Nd5 11.Qc2 Qh4 12.g3 Qg4 13.Ba6 ba6) 8...Bh5 (8...Be6 9.Nf4+– (9.cd5 Bd5 10.Bf6 Qf6 11.Nbc3 Nd7 12.Nd5 cd5 13.Rb1 a5) 9...Nbd7 10.cd5 Bd5 11.a3 Qa5 12.Nd5 cd5 13.Qb3 Rc8) 9.Qb3 Qa5 (9...a5+– 10.Nf4 dc4 11.Qc4 Bg6 12.Ng6 hg6 13.Nc3 Bc3) 10.a3 dc4 (10...Na6 11.Qb2 Be2 12.Be2 Nd7 13.ab4 Qb4) 11.Qb2 (11.Bf6?! cb3 12.ab4 Qb4+/– (12...Qf5 13.Bc3 Be2) 13.Nf4 Bg6) 11...Be7 (11...Be2 12.ab4 Qf5 13.Be2+– Nbd7) 12.Qb7 Nbd7 (12...Nd5 13.Qa8 Qc7 14.Bd4+–; 12...Qb6 13.Qa8 Qb2) 13.Qa8 Bd8 (13...Qd8+– 12.43) 14.Nd4 Qd5 15.Nc3 Nb6 16.Nd5 (16.Nd5 Na8 17.Nf6 Bf6 18.Bf6+–) 1–0. pierre – holyday1, internet, 2011.

5.Ne2 Bb4?? 6.Bg7+– Bg4 7.Bh8 f6 (7...Nd7 8.Qc2+–) 8.Qb3 Na6 9.Nf4 Qd6 (9...Be7 10.cd5 Nc5 11.Qc2+–) 10.cd5 Ne7 11.a3 Bc5 (11...Ba5 12.Qb7 Nc7 13.dc6+–) 12.dc6 bc6 (12...b5 13.Nc3 f5 14.c7 Nc7 15.Nb5 Nb5 16.Bb5 Kf8 17.Qb2+–) 13.Ba6 Rb8 14.Qc4 Qe5 15.Nc3 1–0. gtate (2475) – kode (2275), net–chess.com, 2007.

5.Ne2 Nf6 6.cd5 cd5 7.Bf6 Qf6 8.Nbc3 Be6 9.Nf4 Bb4 10.Ncd5 (10.Bb5 A) 10...Kd8 11.Nfd5 (11.Ncd5 Bd5 12.Nd5 Qg5 13.Qb3 Bd6 14.Bf1+=) 11...Bd5 12.Nd5 Qg5 13.Qb3 Bd6 14.Bf1+=; B) 10...Nc6 11.Nfd5 (11.Ncd5 Bd5 12.Nd5 Qd6 13.Nb4 Qb4 14.Rb1=) 11...Bd5 12.Nd5 Qd6 13.Nb4 Qb4 14.Rb1=; 10.Nfd5 Bd5 11.Nd5 Qd6 12.Nb4 Qb4 13.Rb1 Qa3 14.Qc2+/–) 10...Bd5 11.Nd5 Qd6 12.Nb4 Qb4 13.Rb1 Qe7 14.Qa4 Nc6? (better is 14...Kf8!?+/–) 15.Ba6!+– 0–0 (15...ba6 16.Qc6 (16.Qc4)) 16.Bb7 (16.Rb7?! Qd6+/–) 16...Ne5 17.Qe4 Rab8 18.0–0 Qf6 19.Rfc1 Rfe8 20.Bd5 Rbd8 21.f4 (21.d4!? Nd3 22.Bf7 Qf7 23.Qd3 Qa2+–) 21...Ng4 22.Qf3 Qh4 23.h3 Nf6 24.Bc6 Re7 25.d4 h6 26.Rc5 1–0. gtate (2475) – attasantotjia (2255), net–chess.com, 2007.

5.Ne2 Nf6 6.Bf6 gf6 7.Nbc3 A) 7...Na6 8.a3 (8.Nf4 Nb4 9.a3 d4 10.Ne4 Bf5 11.Qb1 Qe7 12.ab4; 8.b5 Nb4 9.Ng3 Be6 10.bc6 bc6 11.cd5 cd5 12.Bb5) 8...Nc7 9.cd5 cd5 10.d3 f5 11.de4 de4 12.Qd8; B) 7...dc4 8.Nd4 Bb4 9.Bc4 c5 10.Qh5 0–0 11.Nf5 Bf5 12.Qf5; C) 7...Bb4 8.cd5 (8.Rb1 Na6 9.cd5 Nc5 10.Nf4 Bc3 11.dc3 cd5 12.Bb5) 8...cd5 9.Qb3 Na6 10.Nf4 Bc3 11.Qc3 0–0 12.Ba6.

5.Ne2 Nf6 6.Bf6 gf6 7.cd5 cd5 (7...Qd5 8.Nbc3 Qe5 9.Ng3 f5 10.Qh5 Qf6 11.Rb1 Be6 12.b5) 8.Nbc3 (8.b5 Nd7 9.Nbc3 Nb6 10.a4 Bg4 11.Qb3 Be6 12.Nd4) 8...Bb4 9.Qb3 Na6 10.Nf4 Bc3 11.Qc3 0–0 12.Ba6.

5.Ne2 Nf6 6.Bf6 Qf6 7.Nbc3 Bb4 (7...Qe5 8.cd5 (8.a3 Bd6 9.cd5 cd5 10.d4 ed3 11.Qd3 Nc6 12.f4; 8.Qb1 Na6 9.a3 Nc7 10.Nd4 Be7 11.cd5 cd5 12.f4) 8...cd5 9.Nf4 d4 10.Ncd5 de3 11.fe3 Bd6 12.d4) 8.cd5 cd5 (8...0–0!?= 9.Ne4 Qe5 10.N2c3 cd5 11.Qb3 de4 12.Qb4) 9.Nd5+= Qd6 10.Nec3 (10.Rb1 a5 11.Nec3 0–0 12.Nb4) 10...0–0 11.Nb4 Qb4 12.Qb1 Nc6 13.Qe4 Qe4 14.Ne4 f5 (14...Be6!?+/–) 15.Bc4+– Kh8 16.Nd6 h6 17.d4 Bd7? (better is 17...Rf6!? 18.Ne8 Rg6+/–) 18.Nb7+– Rac8 (18...Ne7 19.0–0+–) 19.Nc5 Na5 (19...Be8+–) 20.Nd7 Rfd8 (20...Nc4 21.Nf8 Rf8+–) 21.Be6 Rc2 (21...Rc6 22.d5 Rd6 23.Ne5 Re6 24.de6+–) 22.Ne5 Rf8 (22...Rb8+–) 23.Ng6 Kh7 24.Nf8 (24.Nf8 Kh8 25.Ng6 Kh7 26.Bf5+–) 1–0. happy – elle, internet, 2011.

5.a3 f5

6.Nc3 A) 6...a5 7.b5 (7.ba5 Nf6 8.cd5 cd5 9.Rc1 Ra5 10.Nb5=) 7...Nf6 8.d3 Be7 9.de4 fe4 10.cd5+=; B) 6...Nf6 7.d3 (7.cd5 cd5 8.Nb5 Kf7 9.d3 a5 10.de4=; 7.Rc1 dc4 8.Bc4 Nbd7 9.d4 Nb6 10.Bb3=) 7...Be7 8.cd5 cd5 9.Rc1 Nc6 10.de4=; C) 6...Ne7 7.d3 (7.cd5 Nd5 8.d3 a5 9.b5 Be6 10.de4=; 7.Nh3 dc4 8.Bc4 b5 9.Ba2 Ng6 10.Qh5=; 7.Rc1 dc4 8.Bc4 b5 9.Be2 a5 10.ba5=) 7...a5 8.b5 Nd7 9.bc6 bc6 10.cd5+=; D) 6...dc4 7.Bc4 (7.Qh5 g6 8.Qe2 Nf6 9.Qc4 Nbd7 10.d4=) 7...Nf6 8.d4 b5 9.Bb3 a5 10.ba5=.

6.d4 Nf6 7.Nd2 (7.Nc3 Be6 8.cd5 Nd5 9.Nd5 Bd5=) 7...Be6 (7...Be7 8.Nh3=) 8.cd5 (8.Ne2 Bd6 9.c5 Bc7=) 8...Bd5 (8...Nd5 9.Rc1+=) 9.Bc4 (9.Ne2 Bd6+=) 9...Bc4 (9...a5 10.ba5 Qa5 11.Bd5 Qd5 12.Qc2+=) 10.Nc4= Nbd7 (10...Qd5 11.Qc2=) 11.Ne2 Be7 (11...Nd5 12.0–0=) 12.Nf4 Kf7 (12...Nb6 13.Nb6 Qb6 14.d5=) 13.d5 (13.Ne5 Ne5 14.de5 Qd1 15.Rd1 Ne8+/–) 13...Re8 (better is 13...cd5!? 14.Nd5 Rb8+=) 14.dc6+– bc6 15.Nd6 (15.Bf6 Bf6 16.Nd6 Ke7 17.Nf5 Kf8 18.Qd6 Kg8 19.Rd1 Bc3 20.Ke2+/–) 15...Bd6+= 16.Qd6 g5 (16...Nb6 17.Qc6 Rc8 18.Qb5+/–) 17.Ne2 (17.Nh3 h6 18.Qc6 Qb6 19.Qc4 Qe6+/–) 17...Re6 (17...Ng4 18.h4 Re6 19.Qg3+/–) 18.Qd2 (18.Qg3 Ng4+–) 18...Qe7 (18...Ne5!? 19.Nd4 Nd3 20.Kf1 Nb2 21.Qb2 Rd6+=) 19.Nd4+/– Rd6 20.Qc2 Kg6 (20...Qe5 21.h4 gh4 22.Rh4+/–) 21.0–0 (21.Nc6 Qe6 22.Rc1 Nb6+–) 21...Rc8 (21...Ne5 22.f3 Qe8+–) 22.f4 (22.Nb5 cb5 23.Qc8 Nb6+–) 22...g4 (22...Nd5 23.Rae1 gf4 24.ef4+/–) 23.Rac1 (better is 23.Nb5! cb5 24.Qc8+–) 23...Nd5 (23...c5 24.Rfd1+=) 24.Qf2 (24.Qd2 N5b6 25.Qf2+/–) 24...h5 (24...c5!?+=) 25.Nb3 (25.Nb5 Re6+/–) 25...h4 (25...Kh7 26.Rfd1+/–) 26.Nc5 (26.Rfd1 Qd8+/–) 26...Kh5 (26...Kh7 27.Bd4+/–) 27.Nd7 (27.Qe2 Nc5 28.Rc5 Qe6+/–) 27...Qd7 (27...Rd7 28.Rfd1+/–) 28.Be5 Rg6 29.Rc5 (29.Rfd1 h3+/–) 29...g3 30.Qe2 Kh6 31.h3 Rd6? (better is 31...Rd8+/–) 32.Bd6+– Qd6 33.Rd1 a5 34.Qa6 ab4 35.ab4 Rc7 36.Rdd5 Qf6 37.Rf5 Qd8 38.Qe2 Qe8 39.Rh5 Kg7 40.Qg4 Kf6 41.Qf5 Kg7 42.Qh7 Kf8 43.Rcf5 Rf7 44.Rf7 Qf7+– 45.Rf5 Qf5 46.Qf5 Kg7 47.Qe4 c5 48.bc5 Kf8 49.Qb7 Ke8 50.c6 Kd8 51.Qd7 1–0. Marcos_Yunge (1740) – mngbobo, internet, 2007.

6.cd5 A) 6...Qd5 7.d3 (7.Qh5 Qf7 8.Qf7 Kf7 9.d3 a5 10.ba5+=; 7.Nc3 Qf7 8.d3 Nf6 9.Nge2 a5 10.b5+=) 7...a5 8.Nc3 Qd7 9.Na4 Qc7 10.Qh5+/–; B) 6...cd5 7.Nh3 (7.Nc3 Nf6 8.Nb5 Kf7 9.d3 Nc6 10.de4=; 7.Qh5 g6 8.Qe2 Nf6 9.Nc3 Bg7 10.Qb5=; 7.Bb5 Nc6 8.Ne2 a6 9.Bc6 bc6 10.Nd4=; 7.d3 Nf6 8.Ne2 Nc6 9.de4 fe4 10.Bf6+=) 7...a5 8.Nf4 Nf6 9.Bf6 Qf6 10.Nc3+=.

6.Nh3 A) 6...a5 7.cd5 (7.b5 Nf6 8.cd5 cd5 9.Bf6 Qf6 10.Nc3=; 7.Nf4 Nf6 8.cd5 ab4 9.Nh5 Nh5 10.Qh5+=; 7.ba5 Nf6 8.Nf4 Ra5 9.cd5 cd5 10.Bc3=; 7.Qh5 g6 8.Qd1 Nf6 9.b5 Bg7 10.d4=) 7...ab4 8.Nf4 Nf6 9.Nh5 Nbd7 10.dc6+/–; B) 6...Nf6 7.Nf4 (7.cd5 Nd5 8.d3 Qh4 9.Qd2 a5 10.ba5=; 7.Nc3 dc4 8.Bc4 b5 9.Ba2 a5 10.Ng5=) 7...Bd6 8.Nh5 Nh5 9.Qh5 g6 10.Qe2+=.

6.Qh5 g6 7.Qe2 (7.Qd1 Nf6 8.cd5 cd5 9.d3 Bg7 10.Nd2=) 7...Nf6 8.cd5 cd5 9.d3 (9.Nc3 Bg7 10.Qb5=) 9...Bg7 10.Nd2 0–0 11.de4 de4 (worse is 11...Ne4 12.Bg7 Kg7 13.Qd3+=) 12.Qc4 Kh8 13.Qb3 Qe7 14.Bc4 Nbd7 15.Ne2 Nb6 16.Nd4 Ng4 17.h3 Ne5 18.Be2 Bd7 19.a4 Be8 20.b5 Bf7 21.Qa3 Qd7 22.Rc1 Rac8 23.0–0 Bc4? (better is 23...h6+=; better is 23...Rfd8=) 24.Nc4+– Nbc4 25.Qb4 (better is 25.Bc4 Rc4 26.Nc6 Rc1 27.Rc1 bc6 28.Be5+–; better is 25.Bc4 Rc4 26.Nc6 Rc1 27.Rc1 bc6 28.Be5+–) 25...Nb2+= 26.Qb2 f4 27.Rfd1 f3 28.Bf1 fg2 29.Bg2? (better is 29.Kg2!? Rc1 30.Qc1–/+; better is 29.Kg2!? Rc1 30.Qc1–/+) 29...Nd3–+ 30.Rd3 ed3 31.Rd1 Rc2! (31...Rc2 32.Qa3 Rcf2 33.Qd3 Qd6–+; 31...Rc2 32.Qb4 Rcf2–+) 0–1. Dzuris,Ivan – Galovic,Stefan (2250), SVK–chT1E, 1999.

5.Qb3 Na6

6.a3 A) 6...Be6 7.Nc3 (7.cd5 Bd5 8.Qc2 Nc7 9.Nc3 Nf6 10.Rd1= ) 7...Nc7 8.Qc2 f5 9.cd5 Nd5 10.d3=; B) 6...Nc7 7.d3 (7.Be5 Nf6 8.d4 Bd6 9.Nc3 Be6 10.cd5=; 7.Nc3 Nf6 8.cd5 Ncd5 9.Nd5 Nd5 10.Ne2=; 7.cd5 Nd5 8.Nc3 Ngf6 9.Nd5 Nd5 10.Ne2=) 7...Nf6 8.Nd2 dc4 9.Nc4 Be6 10.Qc2=.

6.Bc3 A) 6...Nc7 7.d3 (7.Be5 Nf6 8.d4 Bd6 9.Bd6 Qd6 10.c5+=; 7.c5 Nf6 8.Ne2 b6 9.Nd4 bc5 10.Nc6+=; 7.d4 Nf6 8.b5 cb5 9.cb5 a5 10.b6+=; 7.Ne2 Nf6 8.Nd4 Bd6 9.c5 Be7 10.Be2=) 7...Nf6 8.Nd2 Bf5 9.de4 Ne4 10.Ne4=; B) 6...Qe7 7.a3 (7.c5 Nc7 8.d3 Nf6 9.Nd2 Bf5 10.de4= ; 7.cd5 Nb4 8.dc6 Nc6 9.d4 ed3 10.Bd3=; 7.Qb2 dc4 8.b5 Nb4 9.Bc4 Qg5 10.g3–/+) 7...Nc7 8.d3 Bf5 9.de4 Be4 10.Nf3=; C) 6...Be6 7.cd5 Bd5 8.Qb2 f6 9.Ba6 ba6 10.Qc2+=.

6.c5 A) 6...b6 7.Qa4 (7.Qa3 Nc7 8.d4 ed3 9.Bd3 bc5 10.bc5–/+) 7...b5 8.Qb3 Nc7 9.a4 Be6 10.Be5=; B) 6...Qg5 7.Qa4 (7.h4 Qg4 8.Rh2 b6 9.Qa4 b5 10.Qb3= ; 7.Nc3 Nf6 8.f4 Qg6 9.Qa4 Nc7 10.a3+=; 7.Qc3 Nf6 8.a3 Be6 9.Ne2 Nc7 10.Qe5=; 7.a3 Nc7 8.d3 Nf6 9.de4 de4 10.Nd2=) 7...Be7 8.h4 Qg4 9.Rh3 b5 10.cb6+/– ; C) 6...Nc7 7.Qc2 (7.Ne2 Nf6 8.d3 b6 9.Nd4 Bd7 10.cb6=; 7.d3 Nf6 8.de4 Ne4 9.Nc3 Be6 10.Ne4=) 7...a5 8.a3 Na6 9.Qc3 Nf6 10.d3=.

6.cd5 Nb4 7.dc6 (7.Nc3 Nf6 8.dc6 bc6 9.Qa4 Bd7 10.Rb1+=) 7...bc6 8.a3 Nd3 9.Bd3 ed3 10.Qa4 =.

5.Qb3 Be6

6.a3 A) 6...Nd7 7.cd5 (7.d3 dc4 8.dc4 a5 9.Nd2 Ngf6 10.Ne2= ; 7.Nc3 Ngf6 8.cd5 cd5 9.Nb5 Be7 10.Nd4+= ; 7.Qc2 Ngf6 8.Nc3 a5 9.b5 Rc8 10.bc6+=; 7.d4 Bd6 8.b5 Qc7 9.c5 Bh2 10.Ne2+=) 7...cd5 8.Ne2 d4 9.Qa4 d3 10.Nd4=; B) 6...a5 7.ba5 (7.d3 dc4 8.dc4 ab4 9.Nd2 ba3 10.Qb7–/+; 7.b5 Nd7 8.Bd4 Ngf6 9.bc6 bc6 10.Qa4+=) 7...Nd7 8.Bd4 Rb8 9.cd5 Bd5 10.Qb2=; C) 6...Nf6 7.d4 (7.cd5 Bd5 8.Qc2 Nbd7 9.Nc3 a5 10.ba5+= ; 7.d3 dc4 8.dc4 a5 9.Ne2 ab4 10.Nd4+=; 7.Nc3 Nbd7 8.cd5 cd5 9.Nb5 Be7 10.Nd4+=; 7.Bf6 Qf6 8.Nc3 dc4 9.Bc4 Bf5 10.Rc1+=) 7...Nbd7 8.c5 Be7 9.Ne2 Bg4 10.h3=.

6.b5 Nd7 7.cd5 (7.bc6 bc6 8.cd5 cd5 9.Qa4 Ngf6 10.Nc3+=; 7.Bd4 Ngf6 8.bc6 bc6 9.Qa4 dc4 10.Bc4+=; 7.Qc2 Rc8 8.Nc3 Ngf6 9.bc6 bc6 10.Rb1+=; 7.d4 ed3 8.bc6 bc6 9.Qd3 Rb8 10.cd5+=) 7...cd5 8.d4 Rc8 9.Ne2 Bd6 10.Nd2 +=.

6.Nc3 dc4!? 7.Bc4 Bc4 8.Qc4 f5 =.

6.Nc3 Be7 7.b5 (7.Nd5 cd5 8.Bg7 Bf6 9.Bh8 Bh8 10.Rd1= ; 7.cd5 cd5 8.Qa4 Nd7 9.Qb5 Ngf6 10.Qb7= ; 7.d3 dc4 8.dc4 Nf6 9.Nge2 a5 10.ba5=; 7.Rd1 Nf6 8.d3 dc4 9.dc4 Nbd7 10.Be2+=) 7...Nd7 8.bc6 bc6 9.cd5 cd5 10.Nd5 =.

6.Nc3 f5 7.cd5= cd5 8.Nge2 (8.Bb5 Nc6=) 8...Nf6 (8...Nc6 9.Nf4 Bf7 10.Ncd5 Nb4 11.Bc4+/–) 9.Nd4+= Bc8 (9...Qb6 10.Bb5 Kf7 11.Na4+=) 10.Bb5+/– Kf7 11.0–0 a6 12.Be2 Nc6 13.Nc6 bc6 14.a3 Bd6 15.d3 Re8 (15...a5 16.Rfd1=) 16.de4 fe4 17.Na4 (17.Rac1 Qc7 18.h3 Kg8=) 17...Kg8 (17...Qc7 18.h3=) 18.Rac1 (18.Nc5 Qc7=) 18...Bd7 (18...Qc7 19.h3=) 19.Nc5+= Bc5 20.Rc5 a5 21.Ra5 (21.ba5 Ra5 22.Bf6 gf6+=) 21...Ra5= 22.ba5 Qa5 23.Bc3 Qc7 24.Rb1 (24.Bf6 gf6 25.Rc1 Qd6=) 24...Bg4 (24...Ng4 25.Bg4 Bg4 26.h3=) 25.Bf1 (25.Qc2 Be2 26.Bf6 Bd3–+ (worse is 26...gf6 27.Qe2 Ra8 28.Qg4 Kh8 29.Rb3+=)) 25...Be6 (25...Rf8 26.Qc2=) 26.Qb7 (26.Bf6 gf6 27.Qc3 Qd6+=) 26...Qd6 (26...Rc8 27.Qc7 Rc7 28.Rb8 Kf7 29.a4=) 27.Qb4 (27.Bf6 gf6 28.Be2 c5=) 27...c5 28.Qb6 Rd8 Black prepares the advance d4 29.a4 (better is 29.Qd6!? Rd6 30.Be5=) 29...d4–/+ 30.Qd6 (30.ed4 Qb6 31.Rb6 cd4 32.Re6 dc3=) 30...Rd6+= 31.ed4 cd4 32.Bb4 (32.Bd2 Kf7+=) 32...Rd8 33.Bb5 (33.a5 Kf7+=) 33...d3 (33...Kf7 34.a5+=) 34.Bd2 Rc8 35.Rb2 (35.a5 Rc2 36.Be3 Nd5+=) 35...Nd5 36.Kf1 Rc2 37.Rc2 dc2 38.Bc4 (38.a5 Kf7+=) 38...Kf7 39.Bd5 (39.a5 Nc3 40.Be2 Ne2 41.Ke2 Ke7=) 39...Bd5 40.Ke2 Ke6 41.Ke3 (41.a5 Ke5+=) 41...Bc6 (41...Ke5 42.a5+=) 42.Kd4 (42.a5!?+=) 42...Ba4–/+ 43.Ke4 Bc6 (43...Bb3!?–/+) 44.Kd3+= Bg2 45.Kc2 Kf5 (45...Be4 46.Kc3+=) 46.Kd3 Kg4 (46...g5 47.Be3+=) 47.Ke2 (47.Bc3 g5=) 47...g5 (47...Bf3 48.Ke3 Bd5 49.Bc3=) 48.Ba5 (48.Be3 Bf3 49.Kd3 Kf5+=) 48...h5 49.Bd8 (49.Bc3 Kf4+=) ½–½. Myslowski,Karol – Kitanovic,T, Paris op–B, 1996.

6.Nc3 Nf6 7.cd5 (7.a3 dc4 8.Bc4 Bc4 9.Qc4 b5 10.Qb3+=; 7.Rc1 dc4 8.Bc4 Bc4 9.Qc4 b5 10.Nb5+=; 7.d3 ed3 8.Bd3 b5 9.cd5 Nd5 10.Qd1–/+; 7.d4 ed3 8.Bd3 b5 9.cd5 Nd5 10.Qd1–/+) 7...Nd5 8.Nd5 Bd5 9.Bc4 Qg5 10.Ne2 =.

6.c5 A) 6...Nf6 7.Ne2 (7.d3 b6 8.Bd4 Nbd7 9.cb6 ab6 10.de4+= ; 7.d4 Be7 8.Ne2 b6 9.Nf4 a5 10.Qa4+=; 7.Bd4 Nbd7 8.d3 a5 9.de4 Ne4 10.a3–/+; 7.Qa4 a5 8.d4 ed3 9.Bd3 Nbd7 10.Bd4–+) 7...b6 8.Nd4 Bd7 9.Nc3 Be7 10.Be2=; B) 6...Nd7 7.d4 (7.d3 Ngf6 8.de4 Ne4 9.Nf3 b6 10.cb6+=) 7...Ngf6 8.Ne2 Be7 9.Nf4 Bg4 10.h3=; C) 6...a5 7.d4 (7.a3 ab4 8.ab4 Ra1 9.Ba1 b6 10.Bd4+= ) 7...ab4 8.Qb4 Nd7 9.Qd2 Ngf6 10.Ne2+=; D) 6...b6 7.d4 (7.Bd4 Nd7 8.Qc3 bc5 9.bc5 Ngf6 10.Ba6+= ; 7.d3 d4 8.Qc2 de3 9.fe3 ed3 10.Bd3–/+) 7...Nf6 8.Nc3 a5 9.Na4 Nfd7 10.b5+=.

6.d3 Na6 7.a3 (7.de4 Bb4 8.Nc3 dc4 9.Bc4 Bc4 10.Qc4+= ) 7...dc4 8.dc4 Qh4 9.Nd2 0–0–0 10.Ne2 =.

6.d3 dc4 7.dc4 Nf6 8.Nd2 Bd6 9.Ne2 Nbd7 10.Nd4 =.

6.d3 Qe7 7.a3 (7.de4 de4 8.Nd2 Nf6 9.a3 Nbd7 10.Bd4= ; 7.Nd2 Nf6 8.de4 Ne4 9.Ne4 de4 10.a3=; 7.c5 Nd7 8.de4 de4 9.Qa4 Qd8 10.Nc3=) 7...Nf6 8.de4 Ne4 9.Nf3 a5 10.c5 =.

6.d3 Nf6 7.de4 (7.Nc3 ed3 8.Bd3 b5 9.cd5 Nd5 10.Qd1–/+ ; 7.Nd2 dc4 8.dc4 Nbd7 9.Rd1 Bd6 10.a3+=) 7...de4 8.Ne2 Na6 9.a3 c5 10.b5 =.

6.cd5 Bd5 7.Bc4 (7.Qc2 Nf6 8.a3 Nbd7 9.Nc3 a5 10.ba5+= ; 7.Qc3 Nd7 8.a3 a5 9.ba5 Ra5 10.d3–/+; 7.Qd1 Nf6 8.a3 a5 9.ba5 Be7 10.Nc3+=) 7...Qg5 8.Ne2 Qg2 9.Rg1 Bc4 10.Qc4 =.

6.d3 ed3

7.c5 b6 8.cb6 ab6 9.a3 Nf6 10.Nd2 +=.

7.Qd3 Bb4 8.Nd2 (8.Bc3 Bc3 9.Qc3 Nf6 10.Nf3 0–0 11.Nbd2 Nbd7–/+; 8.Nc3 dc4 9.Qd8 Kd8 10.a3 Ba5 11.0–0–0 Ke7–/+) 8...Nf6–/+ 9.cd5 Bd5 10.a3 Bd6 11.Rd1 Nbd7 –/+.

7.Bd3 a5 8.ba5 Na6 9.Bd4 Qa5 10.Kf1 +=.

7.Bd3 dc4 8.Bc4 Bc4 (8...Qd6 9.Nd2 Bc4 10.Qc4 Nf6 11.a3 b5=; 8...Qe7 9.a3 a5 10.b5 a4 11.Qc3 Qg5=) 9.Qc4 Nd7 (9...Qd6 10.Nd2 Nf6 11.a3 b5=) 10.Qe4 (10.Nf3 Ngf6 11.a3 Nb6=) 10...Qe7 11.Nd2 (11.Qe7 Ne7=) 11...Qe4 12.Ne4 Bb4 13.Ke2 f6 14.Nf3 0–0–0 15.Rhd1 Ne7 (better is 15...Nh6+=) 16.a3+/– Ba5 17.Nd6 Kc7 18.Nf7 Rhe8 19.Nd8 Rd8 20.Bd4 b6 21.Rd3 c5 22.Bb2 Nc6 23.Nd2 Nde5 (23...Bd2!? 24.Rd2 b5+=) 24.Rd8+/– Kd8 25.Nb3 c4 26.Na5 Na5 27.Be5 fe5 28.Kd1 Kc7 29.Kc2 b5 30.Kc3 Nb3 31.Rd1 Nc5 32.Rd5 Kc6 33.Re5 Nd3 (33...Kd6 34.Re8+–) 34.Rf5 a6 35.e4 Kd6 (35...Nc5 36.f3+–) 36.f3 g6 (36...Nc5 37.Rf7 Ne6 38.f4+–) 37.Rf6 (37.Rd5!? Kc6 38.Rd3 cd3 39.Kd3 Kc5+–) 37...Kc5 (37...Ke5 38.Ra6 Nf4 39.Ra5 Ne2 40.Kb2+–) 38.Ra6 1–0. Trkn – proo, itsyourturn.com, 2000.

7.Bd3 Qh4 8.Bd4 Qg4 (8...dc4 9.Bc4 Bc4 10.Qc4 Qg4 11.g3 Nf6=; 8...Qg5 9.Kf1 dc4 10.Bc4 Bc4 11.Qc4 Bd6=) 9.g3 dc4 10.Bc4 Bc4 11.Qc4 Nf6=; 7...Nd7 8.c5 (8.Ne2 a5 9.0–0 ab4 10.Qc2 Nc5 11.Nd4 Nd3–/+; 8.Nf3 a5 9.a3 ab4 10.ab4 Ra1 11.Ba1 Qb6–/+; 8.Nc3 Ne5 9.0–0–0 Nd3 10.Rd3 Qg5 11.cd5 Bf5–/+) 8...a5 (8...b6 9.cb6 Qb6 10.Nd2 d4 11.Nc4 Qb4+=) 9.a3 ab4 10.ab4 Ra1 11.Ba1 d4+=.

7.Bd3 Qg5

8.Ne2 Qg2 9.Rg1 Qh2 10.Bg7 Bg7 11.Rg7 Qe5 12.Qc3 Qc3 13.Nbc3 dc4.

8.Kf1 dc4 (8...Nf6 9.Nf3 dc4 10.Bc4 Bc4 11.Qc4 Qf5=; 8...Qg4 9.Nd2 dc4 10.Bc4 Be7 11.Ngf3 Nf6=; 8...Qe7 9.Nf3 Nd7 10.Bd4 dc4 11.Bc4 Bc4=; 8...Nd7 9.Nf3 Qe7 10.Bd4 dc4 11.Bc4 Bc4=) 9.Bc4 Bc4 10.Qc4 Nd7 11.Nf3 Qg6 =.

8.g3 b5 9.cb5 d4 10.Bc4 de3 11.Be6 ef2 12.Kf2.

8.g3 dc4 9.Bc4 Bc4 10.Qc4 a5 11.h4 Qf5 =.

8.g3 Nd7 9.Nf3 Qg4 10.Be2 dc4 11.Qc3 Bd5 +=.

8.g3 Qe7 9.Nd2 dc4 10.Bc4 Bc4 11.Qc4 Nd7 =.

8.g3 Be7 9.Nd2 Nf6 10.Ngf3 Qg4 11.Nd4 dc4 =.

8.g3 Nf6 9.Nd2 dc4 10.Bc4 Bc4 11.Qc4 b5 =.

8.g3 Qg4 9.Bd4 (9.Nd2 dc4) 9...dc4 10.Bc4 Bc4 11.Qc4 Nd7 12.Nd2 Ngf6 13.a3 Be7 14.Ne2 0–0 15.0–0 c5 (15...a5 16.b5=) 16.f3 Qh5 17.Nf4 Qg5 18.bc5 Bc5 19.Nb3 Bd4 20.Qd4 Qe5 (20...Rfd8 21.Rac1=) 21.Rac1= Qd4 (21...Qe7!?=) 22.Nd4+= Rfc8 23.Nf5 Kf8 24.e4 b6 (24...Ne5 25.Kg2=) 25.Nd3 Rc1 26.Rc1 (26.Nc1?! Rc8 27.Na2 Ne5=) 26...Ne8 27.Kf2 g6 28.Ne3 Ke7 29.e5 Ng7 30.Nd5 Kd8 31.Ke3 Rc8 32.Rc8 Kc8 33.f4 h5 34.Ke4 Nf5 35.Ne3 Ne7 36.h3 Nf8 37.g4 hg4 38.hg4 Kd7 39.Nd5 Nd5 40.Kd5 Ne6 41.f5 gf5 42.gf5 Nc7 43.Kc4 a5 44.a4 Kc6 45.Nf4 b5 46.ab5 Nb5 47.f6 Nc7 48.e6 Ne6? (48...fe6 49.f7) 49.Ne6+– Kd6 50.Ng5 (better is 50.Ng7+–) +–. Jung – Krueger, corr SOK–89–47, 1989.

5.Qb3 f5

6.b5 Nf6 7.cd5 cd5 8.Nc3 Bd7 (better is 8...Be6=) 9.Nd5+/– Nd5 10.Qd5 Be7?? (better is 10...Bc8 11.Qe5 Qe7 12.Qe7 Ke7+/–) 11.Bg7 Rg8 (11...Bf6 12.Bh8 Bh8+–) 12.Qg8 Bf8 13.Qf8 1–0. GuestGSGR – GuestTNQP, freechess.org, 2017.

6.Nc3 A) 6...Ne7 7.d3 (7.Rd1 a5 8.b5 Be6 9.d3 Nd7 10.de4=; 7.cd5 Nd5 8.Nd5 Qd5 9.Qd5 cd5 10.a3=) 7...a5 8.b5 Nd7 9.d4 Nf6 10.Rb1+=; B) 6...Nf6 7.Rc1 (7.d3 dc4 8.dc4 Qc7 9.Rd1 a5 10.b5= ; 7.cd5 cd5 8.Nge2 Nc6 9.a3 Be6 10.Nb5=; 7.Rd1 Be6 8.d3 Qe7 9.de4 de4 10.a3=; 7.Nh3 Be6 8.Nf4 dc4 9.Bc4 Bc4 10.Qc4=) 7...Na6 8.a3 Nc7 9.cd5 Ncd5 10.Nd5= ; C) 6...Qd6 7.cd5 Nf6 8.dc6 Nc6 9.Nb5 Qe7 10.a3+=; D) 6...dc4 7.Bc4 Nh6 8.f3 b5 9.Nb5 a5 10.Nd4=.

6.cd5 cd5 7.d3 (7.Bb5 Nc6 8.Ne2 a6 9.Bc6 bc6 10.0–0=; 7.Nc3 Nf6 8.a3 a5 9.ba5 Ra5 10.Rc1=; 7.Be2 Nf6 8.d3 Be7 9.Nd2 0–0 10.Rc1=; 7.Nh3 Nf6 8.Nf4 Nc6 9.b5 Na5 10.Qa4=) 7...Nf6 8.de4 fe4 9.Nd2 Bd6 10.Rc1 =.

6.cd5 Qd5 7.Bc4 Qd7 8.Bg8 Bb4 9.Bh7 Qf7 10.Qb4 Rh7 +–.

6.Ne2 dc4+= 7.Qc4 b5 8.Qb3 (8.Qc3 a5 9.ba5 Nf6+=) 8...a5+= 9.a3 a4 10.Qc3 Nf6 11.Nf4 Bd6 12.g3 (12.d4 Bf4 13.ef4 0–0+=) 12...Ra7 13.d3 Re7 (13...0–0 14.Nd2+=) 14.Nd2 Bf4 (14...Be5 15.d4 Bf4 16.gf4+=) 15.gf4 Nd5 16.Qd4 Qb6 (16...ed3 17.0–0–0 c5 18.bc5 b4 19.Bd3 Nc6+/–) 17.Qb6+= Nb6 18.Be5 (18.de4 fe4 19.Rg1 Nd5+/–) 18...N8d7= 19.d4 (19.Bd6!? Re6 20.Bc7=) 19...Ne5+= 20.fe5 The passed pawn on e5 quickly leads to threats 20...Be6 21.Rc1 Kd7 22.Bg2 Nd5 23.Ke2 Bf7 24.Bh3 Bh5 (better is 24...Be6!?=) 25.Kf1 Kc7 (better is 25...g6 26.Ne4 Kd8+/–) 26.Kg2 (better is 26.Bf5 Bf3 27.Rg1+–) 26...Rf8= Black prepares f4 27.Rhe1 f4 28.Kg1 Bf3 29.Nf3 ef3 30.e4 Nb6 31.Rc5 (31.d5!? Re5 32.Rc6 Kb7 33.Rc5+=) 31...Nc4= 32.Rc1 Kb7 (better is 32...Rd8!? 33.d5 Re5 (worse is 33...Ne5 34.Bf1+/–) 34.Rc6 Kb7 35.R1c4 bc4 36.Rc4 Rg5 37.Kh1 Rd6=) 33.Bf1 Na3 34.Rc6 (34.Ra1 Nc4 35.Bc4 bc4 36.Ra4 Rb8+–) 34...Rd8 (34...Nc4 35.Rc5 Kb6+/–) 35.Rd6 (35.R6c3 Rd4 36.Ra3 Re5= (36...Rb4 37.Rf3 Re4 38.Bb5+–)) 35...Red7 (better is 35...Rd6 36.ed6 Re4 37.Rc7 Kb8–/+) 36.Rd7+= Rd7 37.d5 g5 38.Bh3 (38.Ra1 Nc2 39.Bb5 Na1 40.Bd7 a3+/–) 38...g4 (38...Rc7 39.Rc7 Kc7=) 39.Bf1 (39.Bg4 Rg7 40.h3 h5–+) 39...h5+/– 40.d6?? (40.Ra1 Nc2 41.Bb5 Re7 42.Bc6 Kc8 43.Ra4 Nd4 44.Ra8 Kc7 45.d6 Kb6 46.de7 Ne2 47.Kf1 g3 48.hg3 Ng3 49.fg3 fg3 50.Rb8 Ka6 51.b5 Ka5+–) 40...h4 (40...Kb6+=) 41.Bd3?? Kb6?? 42.Rc3 Nc4+= 43.Bc4 bc4 44.Rc4 Rd8 45.Rd4 a3 46.Rd1 Kc6 47.b5 Kd7 48.b6 a2 49.b7 Rb8 50.e6= Ke6 Black gets the initiative 51.d7 Ke7 52.e5 Ke6 53.Kf1? Ke5 54.Ke1 Ke6 55.Ra1 Kd7 56.Ra2 Rb7 57.Ra4 g3 58.hg3 hg3 (58...hg3 59.fg3 fg3 60.Rd4 Ke6–+) 0–1. Jung – Hundak, S:t Ingbert GER, 1989.

6.Ne2 Nf6 (6...dc4 7.Qc4 Nf6 8.Nf4 Bd6 9.Be2 Qe7 10.a3+=) 7.Nbc3 (7.Nf4 Bd6 8.cd5 Bf4 9.ef4 cd5 10.Be2=; 7.Nd4 a5 8.ba5 Ra5 9.cd5 Nd5 10.Nc3=; 7.Nec3 Be6 8.cd5 cd5 9.Qa4 Nbd7 10.Nb5+=) 7...Be6 (7...dc4 8.Qc4 b5 9.Qb3 a5 10.ba5+=) 8.Nf4 (8.c5 b6 9.Nd4 Bd7 10.Be2=) 8...Bf7 (8...dc4 9.Bc4 Bc4 10.Qc4=) 9.cd5 cd5 10.Qa4 (10.Bb5=) 10...Nbd7 11.Qb5 Bd6 12.Ncd5 0–0 13.a3 Nd5 14.Nd5 Ne5 15.Nf4 (worse is 15.Qb7 Rb8 16.Qa7 Bd5–/+) 15...g5 16.Nh3 (16.Be5 a6 17.Bd6 ab5 18.Bf8 Qf8–/+ (18...Kf8?! 19.Ne2+=; 18...gf4?! 19.Bc5+=)) 16...Qe7 17.Be2 a6 18.Qa4 f4 19.Ng1 Rac8 20.Qd1 h5 21.Bd4 g4 22.h3 (22.Bf1!?=) 22...f3–/+ 23.gf3 ef3 24.hg4? (24.Nf3 gf3 25.Rg1 Kh7 26.Bf3 Nd3 27.Ke2 Nf4 28.Kf1 Bc4 29.d3 Bd3 30.Ke1–+) 24...fe2–+ 25.Qe2?? (25.Qb1 Rc1! 26.Qc1 Nd3 27.Ke2 Nc1 28.Rc1 Qg5–+) 25...Bg6 (better is 25...Bc4 26.Be5 Be2 27.Bd6 Qd6 28.Ne2 Qf6–+) 26.f4 (26.Be5!? Qe5 27.Rd1–+) 26...Nd3–+ 27.Kf1 Bf4! 28.ef4 Rf4 29.Nf3 Rf3! 30.Qf3 Rf8 31.Qf8 (31.Rh3 Rf3 32.Rf3–+) 31...Qf8 32.Ke2 Qf4 33.Rag1 Qd4 (33...hg4?! 34.Rh8 Kf7 35.Rf1 Nc1 36.Ke1 Nd3 37.Ke2 Nc1 38.Ke1 Nd3 39.Ke2=) 34.gh5 Qe4 0–1. Baecklin (2010) – Oskarsson,Torsten (1860), Boras SWE, 1979.

5.Qb3 Bf5

6.a3 A) 6...Nf6 7.cd5 (7.Nc3 dc4 8.Bc4 Qd7 9.f3 b5 10.Be2+=; 7.Bd4 Bd6 8.cd5 cd5 9.Nc3 Nc6 10.Bf6+=) 7...Qd5 8.Qd5 Nd5 9.d3 Nd7 10.Nd2=; B) 6...Be6 7.d3 (7.cd5 Bd5 8.Qc2 a5 9.b5 Nd7 10.Nc3= ; 7.Nc3 Nf6 8.Rd1 a5 9.b5 Nbd7 10.Qc2+=; 7.d4 dc4 8.Bc4 Bc4 9.Qc4 Qg5 10.Qf1+=; 7.f3 Nd7 8.d3 dc4 9.dc4 a5 10.Nd2+=) 7...dc4 8.dc4 Nf6 9.Nd2 Nbd7 10.Ne2=; C) 6...dc4 7.Bc4 Nh6 8.Qc3 Nd7 9.Ne2 b5 10.Bb3+=.

6.b5 Nd7 7.bc6 (7.Nc3 Nc5 8.Qc2 dc4 9.Bc4 Qg5 10.Kf1+= ; 7.cd5 Nc5 8.Qc2 cd5 9.Nc3 Rc8 10.Nf3+=; 7.Bd4 Nc5 8.Bc5 Bc5 9.bc6 bc6 10.cd5+=) 7...bc6 8.cd5 Rb8 9.Qc2 cd5 10.Ne2+=.

6.Nc3 A) 6...Nf6 7.Rd1 (7.cd5 cd5 8.Bb5 Nc6 9.Nge2 a6 10.Bc6+= ; 7.Rc1 Be7 8.cd5 cd5 9.Bb5 Nc6 10.Na4= ; 7.a3 dc4 8.Bc4 Qd7 9.f3 b5 10.Be2+=; 7.f3 Be7 8.cd5 cd5 9.g4 Be6 10.Qa4+=) 7...dc4 8.Bc4 Qd7 9.d3 ed3 10.Nf3=; B) 6...Na6 7.a3 (7.c5 Nc7 8.Nge2 Ne6 9.Ng3 Bg6 10.Qc2= ; 7.cd5 Nb4 8.a3 Nd5 9.Qb7 Nde7 10.Rb1= ) 7...Nc7 8.Rd1 dc4 9.Bc4 Ne6 10.f3=; C) 6...Qe7 7.cd5 Nf6 8.b5 Qd7 9.dc6 bc6 10.f3+/–; D) 6...Be6 7.cd5 (7.d3 dc4 8.dc4 Nf6 9.Nge2 Bd6 10.Ng3= ; 7.Rd1 Nf6 8.d3 dc4 9.dc4 Nbd7 10.Nge2= ; 7.a3 Nf6 8.d3 a5 9.ba5 dc4 10.dc4+=; 7.Qa4 Nf6 8.cd5 Nd5 9.a3 Nc3 10.dc3=) 7...cd5 8.Qa4 Nd7 9.Rc1 a6 10.Nge2=; E) 6...dc4 7.Bc4 Nh6 8.b5 Nd7 9.bc6 bc6 10.Qa4+=.

6.Bd4 A) 6...Na6 7.Nc3 (7.c5 Nc7 8.d3 Nf6 9.Nd2 Ne6 10.Be5+=; 7.cd5 Nb4 8.dc6 Nc6 9.Qb7 Bd7 10.Bc3=; 7.a3 Nc7 8.Nc3 Ne7 9.Be5 Rc8 10.Rd1=) 7...Nf6 8.a3 Nc7 9.Rc1 Be6 10.d3=; B) 6...Nf6 7.Nc3 dc4 8.Bc4 Qe7 9.b5 c5 10.Bf6+=; C) 6...dc4 7.Bc4 Nh6 8.Nc3 b5 9.Be2 a5 10.Qb1+=.

6.cd5 A) 6...cd5 7.Nc3 (7.Bb5 Nc6 8.Ne2 a6 9.Bc6 bc6 10.0–0= ; 7.Ne2 Nc6 8.Nd4 Nge7 9.Nf5 Nf5 10.a3=) 7...Nc6 8.b5 Nce7 9.d3 ed3 10.Rd1+=; B) 6...Qd5 7.Qd5 (7.Qc2 Qd8 8.Nf3 Nf6 9.b5 Be7 10.Nd4= ) 7...cd5 8.Ne2 Nc6 9.b5 Nce7 10.Nd4=.

6.f3 A) 6...Nf6 7.Bd4 (7.a3 Be7 8.cd5 cd5 9.g4 Be6 10.g5+= ; 7.Nc3 Be7 8.cd5 cd5 9.g4 Be6 10.Qa4+=; 7.Be2 Nbd7 8.a3 Be6 9.cd5 cd5 10.Bd4+=) 7...Na6 8.a3 Nc7 9.Nc3 Be7 10.cd5=; B) 6...Qh4 7.g3 dc4 8.Bc4 Qh5 9.Ne2 b5 10.Bd5+=; C) 6...dc4 7.Bc4 Qh4 8.g3 Qh5 9.Ne2 b5 10.Bd5+=; D) 6...Be6 7.cd5 (7.Nc3 Nf6 8.a3 Nbd7 9.cd5 cd5 10.Nb5+= ; 7.Bd4 Ne7 8.Nc3 Nf5 9.Be5 Nd7 10.cd5–/+ ; 7.a3 Nd7 8.d3 dc4 9.dc4 a5 10.Nd2+=) 7...Bd5 8.Bc4 Qg5 9.g3 Qf5 10.Bd5=; E) 6...Na6 7.a3 (7.c5 Nc7 8.Nc3 Be7 9.a3 Ne6 10.Qc2+= ) 7...Nc7 8.Nc3 Nf6 9.g4 Be6 10.g5+=.

5.Qb3 Nf6

6.a3 A) 6...Be7 7.cd5 (7.d3 a5 8.cd5 Qd5 9.Qd5 cd5 10.b5= ; 7.Nc3 0–0 8.cd5 cd5 9.d3 a5 10.b5+=) 7...cd5 8.d3 0–0 9.Nd2 Bf5 10.Rd1=; B) 6...Bd6 7.d3 (7.cd5 cd5 8.Nc3 Be6 9.Nb5 Be7 10.Nd4= ; 7.Nc3 dc4 8.Bc4 0–0 9.Qc2 b5 10.Ba2+=; 7.c5 Bc7 8.d3 Nbd7 9.de4 de4 10.Nd2=; 7.d4 dc4 8.Bc4 0–0 9.Qc2 Re8 10.Ne2+=) 7...Be6 8.de4 de4 9.Nd2 Nbd7 10.Qc2=; C) 6...a5 7.cd5 (7.d3 ab4 8.ab4 dc4 9.dc4 Ra1 10.Ba1+=; 7.ba5 Nbd7 8.cd5 Nc5 9.Qc2 Nd5 10.Bd4+=) 7...Nd5 8.b5 a4 9.Qc2 Qh4 10.Ne2=; D) 6...Be6 7.d3 (7.cd5 Bd5 8.Qc2 Nbd7 9.Nc3 a5 10.Nd5+= ; 7.Nc3 dc4 8.Bc4 Bc4 9.Qc4 b5 10.Qb3+= ; 7.d4 Nbd7 8.Nc3 dc4 9.Bc4 Bc4 10.Qc4+=; 7.Bf6 Qf6 8.Nc3 Bd6 9.Rd1 0–0 10.d3+=) 7...dc4 8.dc4 a5 9.Nd2 ab4 10.ab4=.

6.b5 A) 6...Be7 7.cd5 (7.Nc3 0–0 8.bc6 bc6 9.d4 ed3 10.Bd3+= ; 7.d4 a6 8.bc6 Nc6 9.cd5 Qd5 10.Nd2+=; 7.d3 0–0 8.cd5 cd5 9.Nd2 Nbd7 10.Rc1+=; 7.bc6 bc6 8.cd5 0–0 9.dc6 Nc6 10.Bf6=) 7...cd5 8.Ne2 0–0 9.Nf4 Bf5 10.Nc3=; B) 6...Be6 7.Bf6 (7.bc6 bc6 8.Bf6 Qf6 9.Nc3 Nd7 10.Qb7= ) 7...Qf6 8.Nc3 Nd7 9.bc6 bc6 10.Qb7=; C) 6...Nbd7 7.d4 (7.bc6 bc6 8.Qa4 Bb7 9.cd5 Nc5 10.Qc2+= ; 7.Nc3 Nc5 8.Qc2 dc4 9.bc6 bc6 10.Bc4–/+ ; 7.Qc2 Be7 8.Nc3 0–0 9.cd5 cd5 10.Rc1+=; 7.Bd4 Nc5 8.Bc5 Bc5 9.bc6 bc6 10.cd5–/+) 7...Bd6 8.Nc3 Qa5 9.c5 Bb8 10.Be2=.

6.Nc3 A) 6...Be6 7.cd5 (7.a3 dc4 8.Bc4 Bc4 9.Qc4 b5 10.Qb3+=; 7.Rc1 dc4 8.Bc4 Bc4 9.Qc4 b5 10.Nb5+=; 7.d3 ed3 8.Bd3 b5 9.cd5 Nd5 10.Qd1–/+; 7.d4 ed3 8.Bd3 b5 9.cd5 Nd5 10.Qd1–/+) 7...Nd5 8.Bc4 Nb4 9.Be6 fe6 10.Qe6=; B) 6...Na6 7.a3 Nc7 8.cd5 Ncd5 9.Nd5 Nd5 10.d3=; C) 6...Qb6 7.c5 (7.a3 a5 8.Qa4 dc4 9.Bc4 Na6 10.Qc2= ; 7.b5 Be6 8.Na4 Qd8 9.bc6 bc6 10.Bf6=; 7.cd5 Qb4 8.Qb4 Bb4 9.dc6 Nc6 10.f3=) 7...Qd8 8.d3 a5 9.de4 ab4 10.Qb4=; D) 6...Bg4 7.Rc1 (7.cd5 cd5 8.f3 Be6 9.Qa4 Nbd7 10.Nb5= ; 7.a3 Be6 8.Rd1 a5 9.b5 Nbd7 10.Qc2+=; 7.a4 Be7 8.Be2 Be6 9.d3 Nbd7 10.de4+=; 7.Rb1 Be6 8.b5 Nbd7 9.bc6 bc6 10.Qc2=) 7...Be6 8.cd5 Nd5 9.Nd5 Qd5 10.Bc4=; E) 6...Be7 7.d3 (7.Rd1 dc4 8.Bc4 0–0 9.a4 a6 10.a5+= ; 7.cd5 cd5 8.d3 Be6 9.de4 d4 10.Qa4+=; 7.Rc1 dc4 8.Bc4 0–0 9.b5 a6 10.b6+=; 7.a3 a5 8.b5 Be6 9.Qa4 Nbd7 10.bc6+=) 7...dc4 8.dc4 0–0 9.Rd1 Qc7 10.Nge2=.

6.d3 A) 6...a5 7.ba5 (7.b5 dc4 8.Qc4 Bb4 9.Nd2 0–0 10.Rd1+=; 7.a3 ab4 8.ab4 dc4 9.dc4 Ra1 10.Ba1+=) 7...dc4 8.Qc4 Be6 9.Qc2 ed3 10.Bd3+=; B) 6...Be6 7.de4 (7.Nc3 ed3 8.Bd3 b5 9.cd5 Nd5 10.Qd1–/+ ; 7.Nd2 dc4 8.dc4 Nbd7 9.Rd1 Bd6 10.a3+=) 7...de4 8.Ne2 Na6 9.a3 c5 10.b5=; C) 6...Bd6 7.Nd2 (7.de4 de4 8.c5 Bc7 9.Nd2 Nbd7 10.Rd1= ; 7.c5 Bc7 8.de4 de4 9.Nd2 Nbd7 10.Rd1=; 7.cd5 cd5 8.Nd2 Nc6 9.a3 0–0 10.Rd1=; 7.Nc3 dc4 8.Qc4 Be6 9.Qd4 Qe7 10.a3=) 7...0–0 8.de4 Ne4 9.cd5 Nd2 10.Qc3=; D) 6...Be7 7.cd5 (7.de4 de4 8.Nc3 0–0 9.Rd1 Qc7 10.Nge2= ; 7.Nc3 dc4 8.dc4 0–0 9.Rd1 Qc7 10.Nge2= ; 7.Nd2 dc4 8.dc4 a5 9.0–0–0 Nbd7 10.Bf6+=; 7.Bd4 0–0 8.de4 de4 9.Nc3 a5 10.b5+=) 7...Qd5 8.b5 Qb3 9.ab3 Bf5 10.de4=; E) 6...dc4 7.dc4 a5 8.a3 ab4 9.ab4 Ra1 10.Ba1+=.

6.d4 Be6!? =+.

6.Bd4 A) 6...Na6 7.a3 (7.c5 Nc7 8.d3 Ne6 9.de4 Ne4 10.Nc3+= ; 7.cd5 Nb4 8.dc6 Nc6 9.Bb5 Bd7 10.Bc4+=) 7...Nc7 8.Nc3 a5 9.ba5 Ra5 10.Bf6=; B) 6...Bd6 7.cd5 (7.Nc3 dc4 8.Bc4 0–0 9.a4 Nbd7 10.d3+= ) 7...Nd5 8.Nc3 Nc3 9.Bg7 Rg8 10.Bc3+=; C) 6...Be7 7.Nc3 (7.cd5 cd5 8.Nc3 Be6 9.Bb5 Nc6 10.Rc1+= ; 7.d3 dc4 8.dc4 a5 9.a3 ab4 10.ab4+=) 7...dc4 8.Bc4 0–0 9.Qb1 Bf5 10.Nge2=; D) 6...Nbd7 7.Nc3 dc4 8.Bc4 Qe7 9.b5 c5 10.Bf6=; E) 6...Be6 7.Nc3 Nbd7 8.cd5 cd5 9.Rc1 Bd6 10.Nb5+=.

6.cd5 Nd5 7.a3 (7.b5 Nb4 8.Bc4 Nd3 9.Bd3 Qd3 10.Qd3+=; 7.Qc2 Nb4 8.Qe4 Qe7 9.Qe7 Be7 10.Kd1+=; 7.Qc4 f5 8.a3 a5 9.b5 Be6 10.Qc2+=) 7...Be6 8.Qc2 f5 9.Ne2 a5 10.Nd4 =.

6.Be2 A) 6...Be7 7.cd5 (7.d3 dc4 8.dc4 a5 9.a3 ab4 10.ab4+= ; 7.a3 dc4 8.Qc4 Bf5 9.f3 b5 10.Qd4+=; 7.f3 0–0 8.a3 Be6 9.Nc3 Nbd7 10.cd5+=; 7.Nc3 dc4 8.Bc4 0–0 9.a4 Na6 10.Ba3+=) 7...Nd5 8.Nc3 Nf6 9.a3 a5 10.ba5+= ; B) 6...Nbd7 7.a3 (7.d3 a5 8.a3 ab4 9.ab4 Ra1 10.Ba1+= ; 7.Bd4 a5 8.ba5 Nc5 9.Bc5 Bc5 10.cd5+=) 7...dc4 8.Bc4 Qe7 9.d4 Nb6 10.Be2+=; C) 6...Qe7 7.a3 (7.Qc2 dc4 8.Bc4 Qb4 9.a3 Qe7 10.Bf6+=; 7.c5 b6 8.cb6 ab6 9.a3 Be6 10.Qc2+=; 7.Bc3 Be6 8.b5 Qc5 9.cd5 Bd5 10.Qb2+=; 7.b5 Nbd7 8.cd5 Nd5 9.Nc3 Nc3 10.Bc3+=) 7...dc4 8.Qc4 Be6 9.Qc2 Nbd7 10.d4+=; D) 6...Bd6 7.c5 (7.d3 dc4 8.dc4 Be6 9.Nd2 Nbd7 10.Bc3+= ; 7.d4 dc4 8.Bc4 0–0 9.a4 Nbd7 10.a5–/+; 7.cd5 Nd5 8.Nc3 Nc3 9.Qc3 f6 10.f3+=) 7...Bc7 8.d3 Be6 9.de4 de4 10.Qc2+=; E) 6...Be6 7.d3 (7.Nc3 Nbd7 8.cd5 Nd5 9.Ne4 Nb4 10.Qd1–/+ ; 7.c5 Nbd7 8.d4 ed3 9.Bd3 b6 10.cb6–/+; 7.Bd4 dc4 8.Bc4 Bc4 9.Qc4 Nd5 10.a3+=; 7.a3 Bd6 8.d3 dc4 9.dc4 a5 10.Nd2+=) 7...dc4 8.dc4 Bd6 9.Nd2 Nbd7 10.Bc3+=.

6.f3 A) 6...Be7 7.Bd4 (7.cd5 cd5 8.Nc3 0–0 9.a3 Nc6 10.b5+=; 7.Nc3 0–0 8.cd5 cd5 9.Rc1 Be6 10.Qa4+=; 7.a3 0–0 8.cd5 cd5 9.Nc3 Bf5 10.Nge2+=; 7.d4 0–0 8.a3 dc4 9.Bc4 b5 10.Be2+=) 7...0–0 8.Nc3 dc4 9.Bc4 b5 10.Be2=; B) 6...Nh5 7.g3 Nf6 8.Nc3 Be6 9.cd5 Nd5 10.Bc4+=; C) 6...a5 7.ba5 (7.b5 a4 8.Qc2 a3 9.Be5 Nbd7 10.Bd4+= ; 7.cd5 Nd5 8.ba5 Nd7 9.Bd4 Nc5 10.Bc5+=; 7.a3 ab4 8.ab4 Ra1 9.Ba1 Be6 10.Bd4+=) 7...Ra5 8.cd5 Nd5 9.Nc3 Nc3 10.Bc3+=; D) 6...Qe7 7.cd5 (7.a3 Be6 8.Nc3 a5 9.ba5 Na6 10.cd5=; 7.Bf6 Qf6 8.Nc3 dc4 9.Qc4 Be7 10.fe4+=; 7.b5 Nbd7 8.bc6 bc6 9.Qc2 Nc5 10.Bd4+=; 7.c5 b6 8.Bd4 Nbd7 9.Qa4 Bb7 10.Ba6+=) 7...cd5 8.Bf6 Qf6 9.Nc3 Be6 10.Rc1=; E) 6...Be6 7.Nc3 (7.Bd4 Bd6 8.Nc3 0–0 9.Rd1 Ng4 10.cd5–/+ ; 7.d3 ed3 8.Bd3 dc4 9.Bc4 Bc4 10.Qc4–/+; 7.b5 Nbd7 8.cd5 cd5 9.d4 Rc8 10.Ne2–/+) 7...Nbd7 8.cd5 Nd5 9.Nd5 Bd5 10.Bc4+=.

6.d4 ed3

7.Bd3= a5 8.ba5 Nbd7 9.Be2 =.

7.Bd3= Na6 8.a3 Be6 9.Nf3 dc4 10.Bc4 Bc4 11.Qc4 Be7 (11...Bd6 12.Qh4=) 12.Nc3+= 0–0 13.0–0 Qd7 (13...Bd6 14.Ne4 Ne4 15.Qe4+=) 14.Rfd1 Qf5 (14...Qe6 15.Qf4+=) 15.e4 Qf4 (15...Qe6 16.Qe6 fe6 17.Rac1+=) 16.Bc1+/– Qg4 17.h3 Qe6 18.Qe6 fe6 19.Ng5 (19.Be3 c5 20.b5 Nc7+=) 19...Nc7 20.Be3 h6 (20...a5 21.Bc5 ab4 22.Be7 bc3 23.Bf8 Rf8 24.e5+=) 21.Nf3 Rfc8 22.Rab1 (22.Kf1 a5 23.Bc5 Nb5 24.Nb5 Bc5 25.bc5 cb5=) 22...Kf7 (22...Nb5 23.Nb5 cb5 24.Rb3+=) 23.Ne5 Ke8 24.Nc4 (24.Bd4+=) 24...b6 (24...Ncd5 25.Bd2 Nc3 26.Bc3+=) 25.Bb6 (better is 25.Nd6 Bd6 26.Rd6+/–) 25...ab6= 26.Nb6 Nb5 (26...Ra3!? 27.Nc8 Rc3 28.Ne7 Ke7+=) 27.Nb5 (27.Nc8? Nc3 28.Ne7 Ke7–+) 27...cb5 28.f3 Rcb8 (28...g5 29.Nc8 Rc8 30.Rbc1 Rc1 31.Rc1+=) 29.Na8 Ra8 30.Rb3 Nd7 31.Rc1 (31.f4!?+=) 31...Ne5+= 32.Kf2 Nc4 33.Ra1 Bf6 34.Ra2 Bd4 35.Ke2 e5 (35...g5 36.Ke1+=) 36.h4 Kd7 (36...g6 37.Rd3+=) 37.f4 Ke6 (37...ef4? 38.Rd3+–) 38.f5 Kf7 (38...Kf6 39.g4=) 39.g4 Ra4 (39...Kf6 40.Kf3=) 40.Kd3 (40.g5 hg5 41.hg5 Ra8=) 40...Bb2 The pressure on a3 grows (40...Kf6 41.Rc2 Na3 42.Rc6 Kf7 43.Rc7 Kg8 44.Rb7=) 41.Rab2 Nb2 42.Rb2 Ra3 43.Ke2 Rg3 44.Rc2 (44.Rd2 Rg4 45.Kf3 Rf4 46.Ke3 Rh4+=) 44...Rg2= 45.Kd3 Rg3 46.Ke2 Rg2 47.Kd3 Rg3 48.Ke2 Rg2 ½–½. Melich,Jindrich (2160) – Kopal,Josef (2140), CZE–chT1b, 1997.

7.Bd3 Be6

8.Nf3 a5 9.ba5 A) 9...Nbd7 10.a6 (worse is 10.Qb7 Rb8 11.Qc6 Rb2–/+ 12.0–0 Qa5 13.Nd4–/+ ; 10.Qc2 Bb4 11.Nbd2 dc4 12.Bc4 Bc4 13.Qc4= ; 10.Bd4 Qa5 11.Nbd2= Bb4 12.a3 Nc5 13.Bc5=; 10.Nbd2 Nc5 11.Qc2 Nd3 12.Qd3 Ra5 13.Nb3+=) 10...ba6 11.Qc2 Rb8 12.Nbd2 Nc5 13.Be2=; B) 9...Nfd7 10.Be2 (10.Qc2 Na6 11.a3 Ndc5 12.Bh7 dc4 13.Bc3= ; 10.Bd4 Na6 11.Be2 Qa5 12.Nbd2 dc4 13.Qb7= ; 10.Nd4 Nc5 11.Ne6 Qa5 12.Qc3 Nd3 13.Ke2+=; 10.Qc3 Qa5 11.Qa5 Ra5 12.cd5 Bd5 13.Nc3=) 10...Qa5 11.Bc3 Nc5 12.Qc2 Qa4 13.Qb2=; C) 9...Na6 10.Qb7 Nb4 11.Bf6 gf6 12.0–0 Rb8 13.Qa7–+.

8.Nf3 Na6 9.a3 Be7 (9...dc4 10.Bc4 Nc7 11.0–0 Bd6 12.Nbd2 0–0 13.Rfd1+=; 9...Nc7 10.Nbd2 (10.Nc3 a5 11.0–0 b5 12.cd5 Nfd5 13.Qc2+=; 10.0–0 dc4 11.Bc4 Bd6 12.Nbd2 0–0 13.Rad1+=; 10.Be5 dc4 11.Bc4 Bd6 12.Nbd2 Be5 13.Ne5=; 10.Bd4 dc4 11.Bc4 Bc4 12.Qc4 a5 13.ba5=) 10...Qe7 11.0–0 dc4 12.Bc4 Bc4 13.Nc4+=; 9...Rc8 10.Nbd2 (10.0–0 dc4 11.Bc4 Bc4 12.Qc4 Bd6 13.Nc3+=; 10.c5 d4 11.Qc2 de3 12.fe3 Nc7 13.0–0+=) 10...Be7 11.Nd4 dc4 12.Ne6 cb3 13.Nd8+/–; 9...Nb8 10.Nbd2 (10.0–0 dc4 11.Bc4 Bc4 12.Qc4 a5 13.Nc3+=; 10.Bd4 a5 11.c5 ab4 12.0–0 Nfd7 13.Rc1=) 10...dc4 11.Bc4 Qe7 12.Rd1 Nbd7 13.Bd4+=) 10.0–0 (10.c5 d4 11.Qa4 de3 12.Ba6 ba6 13.Qc6+/–; 10.Nc3 Qb6 11.Na4 Qd8 12.Rd1 Qc8 13.Ng5+=) 10...dc4 11.Bc4 Bc4 12.Qc4 0–0 13.Nbd2 (13.e4+=) 13...Qd5 14.Qe2 Nc7 15.Nc4 Qe4 16.Na5 b6 17.Nd2 Qe6 18.Nab3 Ncd5 19.Qf3 Nd7 20.e4 N5f6 21.Nd4 Qd6 22.Nc4 Qc7 23.Nf5 Rfe8 24.e5 (24.Ne7?! Re7 25.e5 Ne8+=) 24...Nd5 25.Ncd6 (25.Ne7?! Re7 26.Rac1 a6+=) 25...Bf8?? (25...f6 26.Rac1 Bd6 27.Nd6 Red8 28.Qd5 cd5 29.Rc7 Ne5+–) 26.Nh6!! gh6 27.Qf7 (27.Qg3 Bg7 28.Nf5 Qe5 29.Be5 Ne5 30.Qg7) 27...Kh8+– 28.e6 (28.e6 N7f6 29.Bf6 Nf6 30.Qc7 Bd6 31.Qd6+–) 1–0. Blechar,Michael J – Braun,Charles, corr USCCC–2, 1977.

8.Nf3 Na6 9.c5 A) 9...Nb8 10.Bd4 (10.Nd4 a5 11.0–0 ab4 12.Qb4 Nbd7 13.Ne6= ; 10.0–0 Nbd7 11.Qc2 Qc7 12.Nbd2 Be7 13.Bd4+= ; 10.Nbd2 b6 11.Nd4 a5 12.Qa3 Nfd7 13.Ne6=; 10.Ng5 b6 11.Bd4 Nbd7 12.cb6 ab6 13.Nc3=) 10...b6 11.0–0 bc5 12.bc5 Nbd7 13.Qc2+=; B) 9...Be7 10.a3 (10.Nd4 Nc7 11.0–0 0–0 12.Nd2 Re8 13.Qc2+=; 10.Ba6 ba6 11.Ne5 Bd7 12.Qa4 a5 13.Nd7+=; 10.Qc3 Qc8 11.Nd4 Ne4 12.Qa3 Nc7 13.f3+=; 10.0–0 0–0 11.Ba6 ba6 12.Ne5 Bd7 13.Bd4+=) 10...d4 11.Qa4 de3 12.Ba6 ba6 13.Qc6+/–; C) 9...Nc7 10.Bd4 (10.Nd4 Qd7 11.0–0 b6 12.cb6 ab6 13.Rc1+=) 10...Be7 11.0–0 a5 12.ba5 Bc8 13.Nbd2+=.

8.Nf3 dc4 9.Bc4 A) 9...Bc4 10.Qc4 Qd5 11.Qd5 Nd5 12.a3 a5 13.ba5=; B) 9...Qd6 10.a3 (10.Bf6 Bc4 11.Qc4 Qf6 12.Nc3 a5 13.ba5= ; 10.Be6 Qe6 11.b5 Ne4 12.Qe6 fe6 13.a4=; 10.Nbd2 Bc4 11.Qc4 Qb4 12.Bf6 Qc4 13.Nc4=) 10...Bc4 11.Qc4 a5 12.b5 Qd5 13.Qd5+=; C) 9...Qe7 10.a3 (10.Be6 Qe6 11.Bf6 Qf6 12.Nc3 Nd7 13.0–0=; 10.Nbd2 Bc4 11.Qc4 Qb4 12.Bf6 Qc4 13.Nc4=; 10.Bf6 Qf6 11.Nc3 b5 12.Be6 Qe6 13.Qe6=; 10.Bc3 Nd5 11.b5 Nd7 12.Bd4 N7b6 13.Bb6=) 10...a5 11.ba5 Bc4 12.Qc4 Ra5 13.0–0=; D) 9...Nd5 10.Nc3 a5 11.ba5 Nd7 12.Nd4 Nc5 13.Ne6=.

8.Nf3 Nbd7 9.0–0 a5 (9...dc4 10.Bc4 Bc4 11.Qc4 Bd6 12.Rd1 Nb6 13.Qc2=) 10.a3 (10.Qc2 ab4 11.Rd1 dc4 12.Bc4 Bc4 13.Qc4+=; 10.Rd1 Bb4 11.Qc2 Rc8 12.a3 Bd6 13.Nbd2+=; 10.Ba3 ab4 11.Bb4 b5 12.cb5 c5 13.Bc3–/+) 10...ab4 11.ab4 Ra1 12.Ba1 Qb6 13.Nbd2 +=.

8.Nf3 Qe7 9.a3 A) 9...dc4 10.Bc4 a5 11.ba5 Nbd7 12.Nbd2 Nc5 13.Qc2+=; B) 9...Nbd7 10.Nbd2 (10.0–0 dc4 11.Bc4 Nb6 12.Be6 Qe6 13.Qc2+= ; 10.Bd4 c5 11.bc5 Nc5 12.Bc5 Qc5 13.Qb7+=) 10...Rd8 11.0–0 dc4 12.Bc4 Nb6 13.Be6+=; C) 9...a5 10.ba5 (10.c5 d4 11.Qa4 de3 12.fe3 Nd5 13.Bd4= ; 10.b5 Nbd7 11.Be2 Nc5 12.Qc2 dc4 13.bc6=) 10...Ra5 11.cd5 Rd5 12.Qc2 Nbd7 13.Nc3=.

8.Nf3 Be7

9.0–0 A) 9...0–0 10.c5 (10.Nbd2 dc4 11.Bc4 Nd5 12.Rfd1 b5 13.Bd5+= ; 10.Bd4 dc4 11.Bc4 Bc4 12.Qc4 b5 13.Qb3= ; 10.Na3 Nbd7 11.Nd4 a5 12.Ne6 fe6 13.b5+=; 10.Rc1 Re8 11.c5 d4 12.Qc2 de3 13.fe3+=) 10...a5 11.a3 b6 12.Qc2 bc5 13.bc5+=; B) 9...Nbd7 10.c5 (10.Bd4 dc4 11.Bc4 Bc4 12.Qc4 Nb6 13.Qb3= ; 10.a3 Qb6 11.cd5 Bd5 12.Bc4 Nc5 13.Qc2= ; 10.Rd1 a5 11.Ba3 ab4 12.Bb4 Qb6 13.Bc3+=; 10.Nbd2 0–0 11.a3 c5 12.Bf6 Nf6 13.bc5=) 10...a5 11.a3 ab4 12.ab4 Ra1 13.Ba1+=; C) 9...Qc7 10.Be5 (10.Rd1 Nbd7 11.Nbd2 0–0 12.Qc3 dc4 13.Nc4+= ; 10.Nbd2 Nbd7 11.Bd4 0–0 12.Rfd1 b6 13.Rac1+=; 10.Bd4 dc4 11.Bc4 Bc4 12.Qc4 Nbd7 13.Nc3+=; 10.Nc3 dc4 11.Bc4 Bc4 12.Qc4 Nbd7 13.Rad1+=) 10...dc4 11.Bc4 Bc4 12.Qc4 Qd7 13.a3+=; D) 9...a5 10.a3 (10.ba5 dc4 11.Bc4 Bc4 12.Qc4 Qa5 13.a4= ) 10...dc4 11.Bc4 Bc4 12.Qc4 ab4 13.ab4=; E) 9...dc4 10.Bc4 Bc4 11.Qc4 Qd5 12.Qc1 0–0 13.Rd1=.

9.a3 A) 9...dc4 10.Bc4 Bc4 11.Qc4 0–0 12.0–0 a5 13.b5+=; B) 9...0–0 10.Nbd2 (10.cd5 Bd5 11.Qc2 Bf3 12.gf3 a5 13.Rg1= ; 10.Nc3 a5 11.0–0 Na6 12.cd5 cd5 13.Ba6= ; 10.0–0 c5 11.Nc3 dc4 12.Bc4 cb4 13.ab4=; 10.c5 b6 11.cb6 ab6 12.0–0 c5 13.Qc3=) 10...a5 11.0–0 Nbd7 12.Rfd1 ab4 13.ab4+=; C) 9...Nbd7 10.Nbd2 (10.0–0 Qb6 11.cd5 Bd5 12.Bc4 Bc4 13.Qc4= ) 10...c5 11.b5 0–0 12.0–0 Qb6 13.cd5+=; D) 9...a5 10.0–0 dc4 11.Bc4 Bc4 12.Qc4 ab4 13.ab4=.

9.Nbd2 A) 9...0–0 10.0–0 (10.c5 d4 11.Qc2 de3 12.fe3 h6 13.0–0= ) 10...Nbd7 11.Rfd1 a5 12.a3 ab4 13.ab4+=; B) 9...Na6 10.a3 dc4 11.Bc4 Bc4 12.Nc4 0–0 13.Rd1+=; C) 9...dc4 10.Bc4 Nd5 11.e4 b5 12.ed5 bc4 13.Qc2+=; D) 9...Nbd7 10.0–0 (10.Ng5 a5 11.Ne6 fe6 12.a3 ab4 13.ab4= ; 10.Bd4 b6 11.0–0 0–0 12.b5 Rc8 13.bc6=) 10...0–0 11.a3 c5 12.Bf6 Nf6 13.bc5=; E) 9...a5 10.ba5 Na6 11.Ba3 0–0 12.0–0 Re8 13.cd5=.

9.Bd4 dc4 10.Bc4 Bc4 11.Qc4 b5 12.Qb3 a5 13.ba5=.

9.Ne5 A) 9...dc4 10.Bc4 Qd6 11.a3 a5 12.ba5 Ra5 13.Be6=; B) 9...Nbd7 10.0–0 (10.Nd7 dc4 11.Bc4 Qd7 12.Nd2 Rd8 13.Rd1= ; 10.Nd2 a5 11.Nd7 Qd7 12.ba5 Ra5 13.Qc2= ) 10...Ne5 11.Be5 dc4 12.Bc4 Bc4 13.Qc4=; C) 9...a5 10.b5 (10.ba5 Qa5 11.Nd2 Bb4 12.Rd1 Ne4 13.Be4+= ) 10...a4 11.Qc2 dc4 12.Bc4 Bb4 13.Bc3=.

6.cd5 cd5

7.a3 Nc6 8.d4 Bd6 9.Nc3 0–0 10.Rc1 +=.

7.Bb5 Bd7 8.Bd7 Nbd7 9.Nc3 Nb6 10.Rd1 +=.

7.Nc3 Be6 8.Qa4 Nbd7 9.Nb5 a6 10.Nd4 +=.

7.Ne2 Nc6 8.b5 Na5 9.Qc2 Bd7 10.Bf6 +=.

7.Bf6 Qf6

8.Nc3 Be6

9.Rc1 d4 10.Ne4 (10.Nd5 Qd8 11.Bb5 Nd7 12.Nc7 Ke7 13.Ne6 fe6 14.ed4+/–) 10...Bb3? (10...Qe5 11.Qc2 (11.Qb1 de3 12.fe3 Ba2 13.Rc8 Ke7 14.Qa2 Qe4+/–; 11.Qd3 de3 12.Qe3 Bb4 13.Nf3 Qb2 14.Bb5=; 11.Qa4 Bd7 12.Qc2 de3 13.fe3 Bb4 14.Nf3=) 11...Nc6 12.Nf3 Qd5 13.Bc4 Qc4 14.Qc4+=) 11.Nf6+/– gf6 12.ab3 Nc6 13.Bb5 Kd7 14.Nf3 a6? (better is 14...de3!? 15.fe3 Bb4+/–) 15.Bc6+– bc6 16.Nd4 Bb4 17.Rc6 (worse is 17.Nc6 Rhc8+=) 17...Rac8 18.Rc8 Rc8 19.Ke2 Kd6 20.Ra1 a5 21.g4 Rc5 22.f4 h5 23.h3 hg4 24.hg4 Kd5 25.Kd3 Kd6 26.e4 Kd7 27.Rh1 Rc8 28.Rh7 Ke7 29.Nf5 Ke6 30.Ke3 Rg8 31.d4 Rc8 (31...Rf8 32.Kd3+–) 32.d5 Kd7 33.Rf7 Ke8 34.Rf6 Rc3 35.Kd4 Rb3 36.e5 Rc3 (36...Rb1+–) 37.Nd6 Ke7 38.Rf7 Kd8 39.e6 Rc7 (39...Bd6 40.Kc3 Bb4 41.Kc4+–) 40.Rc7 Kc7 41.e7 1–0. mtr – grey, internet, 2001.

9.Rc1 Kd8 10.Nge2 (10.Nh3 Bd6 11.Nf4 Bf4 12.ef4 Qf4 13.Ne2 Qf6 14.Qg3+=) 10...Nc6 (10...d4 11.Nd5 Qf5 12.Nd4 Bd5 13.Nf5 Bb3 14.ab3+=) 11.Nf4 (11.b5 Na5 12.Qa4 Nc4 13.Nf4 Nb6 14.Qa5=) 11...Bd6 12.b5 Nb4 13.a3 Bf4 14.ef4 =.

9.Rc1 Qd8 10.Qa4 A) 10...Nc6 11.Bb5 (11.a3 a5 12.b5 Ne5 13.b6 Nc6 14.Bb5+= ; 11.b5 Ne5 12.b6 Nc6 13.Bb5 Qb6 14.Ne4+= ) 11...Qd6 12.f3 f5 13.Nge2 Bd7 14.a3=; B) 10...Qd7 11.Bb5 Nc6 12.Ne4 de4 13.Rc6 Ke7 14.Rc3+/– ; C) 10...Nd7 11.Qb5 (11.Nge2 Bd6 12.Qb5 Qb6 13.Qb6 Nb6 14.Nb5= ; 11.a3 Be7 12.Qb5 Qc7 13.Nce2 Qb8 14.Nd4=; 11.d4 a5 12.ba5 Qa5 13.Qa5 Ra5 14.Rb1=; 11.h3 a6 12.d4 ed3 13.Bd3 b5 14.Qa3–/+) 11...Qc7 12.Nge2 a6 13.Qa4 Rc8 14.Nd4=.

9.Rc1 Qd8 10.Bb5 Nc6 11.Qa4= (11.Nce2 Rc8 12.Nf4 Qb6 13.Bc6 Rc6 14.Rc6+=) 11...Qd6 12.f3 f5 13.Nge2 Bd7 14.a3 =.

9.Rc1 Qe5 10.Qa4 A) 10...Nd7 11.d4 (11.a3 Be7 12.d4 Qf5 13.Nge2 a6 14.Nf4= ) 11...ed3 12.Nf3 Qd6 13.a3 Qc6 14.Qd1+=; B) 10...Bd7 11.Qa5 (11.b5 Na6 12.Qb3 Nc7 13.d4 Qd6 14.f3+= ; 11.Qb3 Be6 12.Qa4 Nd7 13.d4 ed3 14.Nf3= ; 11.Bb5 Nc6 12.Nge2 Rd8 13.a3 a6 14.Bc6=) 11...Bc6 12.b5 Bd7 13.d4 Qd6 14.b6+=; C) 10...Kd8 11.Nge2 (11.a3 a5 12.d4 Qc7 13.Nge2 Qd7 14.Nb5+= ; 11.d3 d4 12.ed4 Qd4 13.a3 e3 14.Qa5+=; 11.d4 Qc7 12.a3 Bd6 13.Qd1 Qd7 14.Nb5+=) 11...Nc6 12.b5 Ne7 13.Nd4 Bf5 14.Qa5+=; D) 10...Nc6 11.b5 (11.a3 Be7 12.f3 f5 13.Nge2 0–0 14.b5+= ) 11...Nb8 12.b6 Nd7 13.d4 ed3 14.Nf3=.

9.Rc1 Qe5 10.Bb5 A) 10...Nc6 11.Nge2 (11.Qa4 Bd7 12.Nge2 Rd8 13.a3 a6 14.Bc6=) 11...Rc8 12.Nf4 d4 13.Ne6 dc3 14.Bc6=; B) 10...Nd7 11.Nge2 (11.Bd7 Kd7 12.Nge2 Bd6 13.Nf4 Rhc8 14.Ne6=) 11...Bd6 12.Nd4 Be7 13.Bd7 Kd7 14.Qa4+=; C) 10...Kd8 11.d4 ed3 12.Nf3 d2 13.Kd2 Qd6 14.Rhd1=.

5.Nc3 Nf6

6.a3 A) 6...a5 7.Qa4 (7.ba5 dc4 8.Bc4 Ra5 9.Qb3 Qc7 10.Qc2=; 7.b5 Bd6 8.bc6 bc6 9.cd5 cd5 10.Qb3=) 7...dc4 8.b5 Be6 9.Bc4 Nbd7 10.bc6=; B) 6...Bd6 7.d3 (7.cd5 cd5 8.d3 Bg4 9.Be2 Be2 10.Nge2=; 7.Qc2 0–0 8.cd5 cd5 9.Nb5 Nc6 10.Nd6=) 7...Bg4 8.Be2 Be2 9.Nge2 a5 10.c5=; C) 6...Be7 7.d3 (7.cd5 cd5 8.d3 0–0 9.de4 de4 10.Qc2=) 7...a5 8.b5 0–0 9.bc6 bc6 10.de4=; D) 6...dc4 7.Qc2 (7.Bc4 b5 8.Ba2 a5 9.Qc2 Bf5 10.ba5+=; 7.Qb1 Bf5 8.Nge2 Bd6 9.Nd4 Bg6 10.Bc4+=) 7...Bf5 8.Bc4 Nbd7 9.Nf3 ef3 10.Qf5=.

6.Rb1 dc4 7.Qc2 (7.Bc4 b5 8.Be2 a5 9.Qc2 Bf5 10.ba5–/+; 7.b5 Be6 8.Ba1 cb5 9.Nb5 Nbd7 10.Bf6–/+) 7...Bf5 8.Bc4 b5 9.Bf1 a5 10.ba5 +=.

6.Qb3 A) 6...Be7 7.a3 (7.Rd1 dc4 8.Bc4 0–0 9.a4 a6 10.a5+=; 7.cd5 cd5 8.d3 Be6 9.de4 d4 10.Qa4+=; 7.d3 dc4 8.dc4 0–0 9.Rd1 Qc7 10.Nge2=) 7...0–0 8.cd5 cd5 9.d3 a5 10.b5=; B) 6...Na6 7.a3 Nc7 8.cd5 Ncd5 9.Nd5 Nd5 10.d3=; C) 6...Qd6 7.a3 (7.c5 Qe7 8.d3 b6 9.de4 bc5 10.bc5=; 7.cd5 Qb4 8.Qb4 Bb4 9.dc6 Nc6 10.f3=; 7.Rc1 Qb4 8.cd5 Bf5 9.dc6 Nc6 10.Qb4=; 7.Rb1 Be7 8.cd5 Qb4 9.Qb4 Bb4 10.dc6=) 7...Be7 8.cd5 cd5 9.Rc1 Qd8 10.Nb5=; D) 6...Qe7 7.cd5 (7.b5 dc4 8.Bc4 Nbd7 9.bc6 bc6 10.Qc2=; 7.a3 dc4 8.Bc4 b5 9.Be2 a5 10.ba5+=) 7...Qb4 8.Qb4 Bb4 9.dc6 Nc6 10.f3=; E) 6...Be6 7.cd5 (7.a3 dc4 8.Bc4 Bc4 9.Qc4 b5 10.Qb3+=; 7.Rc1 dc4 8.Bc4 Bc4 9.Qc4 b5 10.Nb5+=; 7.d3 ed3 8.Bd3 b5 9.cd5 Nd5 10.Qd1–/+; 7.d4 ed3 8.Bd3 b5 9.cd5 Nd5 10.Qd1–/+) 7...Nd5 8.Qc2 Nb4 9.Qe4 Nd7 10.Qb1+=.

6.b5 A) 6...Bd6 7.Rc1 (7.bc6 bc6 8.cd5 cd5 9.Nb5 0–0 10.Rc1=; 7.Qb3 Nbd7 8.cd5 Nc5 9.Qc4 cd5 10.Nd5=; 7.cd5 cd5 8.d3 0–0 9.de4 de4 10.Qd4+=; 7.Rb1 0–0 8.bc6 bc6 9.d4 Qa5 10.Qd2+=) 7...dc4 8.Bc4 0–0 9.d3 cb5 10.Nb5=; B) 6...cb5 7.Nb5 (7.cb5 Bd6 8.d3 Qe7 9.Nge2 Be5 10.d4=) 7...dc4 8.Bf6 gf6 9.Bc4 Nc6 10.Bd5+=; C) 6...Be7 7.cd5 (7.bc6 bc6 8.Rb1 0–0 9.d4 Be6 10.Qa4+=; 7.Rc1 0–0 8.cd5 cd5 9.d3 Nbd7 10.Nge2=; 7.d3 dc4 8.dc4 0–0 9.Qd8 Rd8 10.Rd1+=; 7.Qc2 0–0 8.cd5 cd5 9.d3 Qa5 10.Nge2=) 7...cd5 8.d3 Nbd7 9.Nge2 0–0 10.Rc1=.

5.c5 Nf6

6.a3 b6 A) 7.Nc3 bc5 8.Nge2 Nbd7 9.Nf4 Rb8 10.Qc2 cb4 11.ab4 Bb4 12.Be2 0–0; B) 7.Ne2 bc5 8.Nbc3 Nbd7 9.Nf4 Rb8 10.d4 ed3 11.Bd3 Bd6 12.0–0 0–0; C) 7.Nh3 bc5 (7...a5 8.cb6 ab4 9.ab4 Ra1 10.Ba1 Qb6 11.Bf6 gf6 12.b5 d4) 8.Nc3 Be7 9.Nf4 0–0 10.bc5 Nbd7 11.Na4 Rb8 12.Qc2 g5; D) 7.d4 Be7 (7...Nbd7 8.Nc3 Be7 9.Nge2 0–0 10.Ng3 g6 11.Be2 bc5 12.bc5 h5; 7...bc5 8.bc5 Be7 9.Nc3 0–0 10.Rb1 Qa5 11.Nge2 h6 12.Qa4 Qa4) 8.Ne2 0–0 9.Nbc3 bc5 10.bc5 Nbd7 11.Ng3 g6 12.Be2 Rb8.

6.a3 Nbd7 A) 7.d4 Be7 (7...Rb8 8.Nh3 b6 9.Nd2 bc5 10.dc5 Qc7 11.Nf4 Ne5 12.Qc2 Be7; 7...b6 8.Nc3 Be7 9.Nge2 0–0 10.Ng3 Rb8 11.Rb1 bc5 12.bc5 g6; 7...Qc7 8.Nc3 Be7 9.Nge2 h5 10.Rb1 Nf8 11.b5 Ng6 12.h4 Bg4; 7...h6 8.Nc3 Be7 9.Nge2 0–0 10.Ng3 Nb8 11.Be2 Be6 12.0–0 Nbd7) 8.Nc3 Nf8 9.Nge2 Ng6 10.g3 h5 11.h4 0–0 12.Bg2 Bg4; B) 7.d3 Be7 (7...b6 8.cb6 ab6 9.Nc3 ed3 10.Bd3 Ne5 11.Nf3 Bg4 12.Be2 Bf3; 7...Qe7 8.de4 de4 9.Nh3 Ne5 10.Qd4 Nd3 11.Bd3 Bh3 12.gh3 Rd8; 7...a5 8.Nd2 Be7 9.de4 de4 10.Qc2 0–0 11.Rd1 Qc7 12.Ne4 ab4) 8.Nd2 0–0 9.de4 Ne4 10.Ne4 de4 11.Ne2 Bf6 12.Nd4 Ne5; C) 7.Ne2 Be7 (7...b6 8.Nd4 Ne5 9.b5 Bd7 10.cb6 ab6 11.bc6 Nc6 12.Nc3 Nd4; 7...a5 8.Nbc3 Be7 9.Nf4 0–0 10.d4 ed3 11.Bd3 ab4 12.ab4 Ra1; 7...g6 8.Nbc3 Ne5 9.Nd4 Be7 10.Be2 0–0 11.Qc2 Bg4 12.f3 ef3) 8.d4 Nf8 9.Nbc3 Ng6 10.Ng3 Nh4 11.f3 ef3 12.gf3 Be6; D) 7.Nc3 Be7 (7...b6 8.d4 Rb8 9.Rb1 Be7 10.Nge2 bc5 11.bc5 Ba6 12.Ng3 Bf1; 7...g6 8.Nh3 Bg7 9.Nf4 0–0 10.Be2 Ne5 11.0–0 Qc7 12.Qc2 g5) 8.d4 b6 9.Nge2 bc5 10.bc5 Rb8 11.Rb1 Ba6 12.Ng3 Bf1.

6.a3 Be7 A) 7.Ne2 0–0 (7...b6 8.Nbc3 bc5 9.bc5 0–0 10.d4 ed3 11.Nd4 Qc7 12.Na4 Nbd7; 7...Nbd7 8.Nf4 0–0 9.Nc3 Qc7 10.d4 ed3 11.Bd3 Ne5 12.0–0 g5) 8.Nbc3 b6 9.Na4 Nbd7 10.Nd4 Ne5 11.Be2 Qc7 12.Qc2 Bg4; B) 7.Nh3 0–0 (7...Bh3 8.gh3 Nbd7 9.d4 Nf8 10.Nc3 Ne6 11.Bg2 0–0 12.0–0 Qc7; 7...b6 8.cb6 ab6 9.Nc3 0–0 10.d3 Bg4 11.Qc2 c5 12.de4 cb4; 7...Na6 8.Nc3 0–0 9.Nf4 Re8 10.h4 Nc7 11.Be2 Ne6 12.Ne6 Be6; 7...Qc7 8.Nc3 Bh3 9.gh3 Nbd7 10.d4 ed3 11.Bd3 0–0 12.0–0 Ne5) 8.Nc3 Na6 9.Nf4 Nc7 10.d4 Bf5 11.Be2 g5 12.Nh5 Nh5; C) 7.d3 0–0 (7...Nbd7 8.Nc3 0–0 9.de4 Ne4 10.Ne4 de4 11.Ne2 Bf6 12.Nd4 Ne5) 8.Nc3 a5 9.de4 de4 10.Nge2 Qc7 11.Nd4 Nbd7 12.Qc2 Ne5; D) 7.Nc3 0–0 (7...Qc7 8.d3 0–0 9.de4 Ne4 10.Ne4 de4 11.Qc2 Bf5 12.Ne2 Nd7; 7...b6 8.d4 0–0 9.Nge2 Na6 10.Nf4 bc5 11.dc5 Rb8 12.Qc2 Nc7; 7...Nbd7 8.Nh3 0–0 9.Nf4 Qc7 10.d4 ed3 11.Bd3 Ne5 12.0–0 g5; 7...a5 8.Nge2 0–0 9.Nf4 g5 10.Nh5 Nh5 11.Qh5 ab4 12.ab4 Ra1) 8.Nge2 b6 9.Nd4 bc5 10.bc5 Qc7 11.Be2 Nbd7 12.Na4 Ne5.

6.Nc3 a5 7.a3 b6 8.cb6 ab4 9.ab4 Ra1 10.Qa1 Qb6 +=.

6.Nc3 b6 A) 7.d3 a5 (7...ed3 8.Nf3 bc5 9.bc5 Nbd7 10.Bd3 Nc5 11.0–0 Rb8 12.Rb1 Bd6; 7...bc5 8.bc5 ed3 9.Bd3 Nbd7 10.Nge2 Nc5 11.0–0 Bd6 12.Nd4 Nd3) 8.b5 Bc5 9.de4 de4 10.Qd8 Kd8 11.Nh3 Ke7 12.Rd1 Bf5; B) 7.Na4 bc5 (7...Nbd7 8.Ne2 Qc7 9.Qc2 b5 10.Nac3 a5 11.a3 Be7 12.Nd4 Ne5; 7...Bb7 8.Nh3 Nbd7 9.Bd4 Be7 10.Be2 0–0 11.0–0 b5 12.Nc3 a5) 8.bc5 Na6 9.Bd4 Be7 10.Rb1 Nc7 11.Ne2 Ne6 12.Bc3 0–0; C) 7.Qa4 bc5 8.bc5 Bc5 9.Nge2 0–0 10.Rb1 Qc7 11.Nd4 Bb7 12.Be2 Nbd7; D) 7.d4 ed3 8.Bd3 bc5 9.a3 Na6 10.b5 c4 11.Bc2 cb5 12.Nf3 Nc7.

6.d3 a5 7.a3 ab4 8.ab4 Ra1 9.Ba1 Na6 10.Bc3 d4 11.ed4 Qe7 12.Qe2 Bf5.

6.d3 a5!? 7.a3 ab4 8.ab4 Ra1 9.Ba1 ed3 10.Bd3 b6 –/+.

6.d3 a5 7.a3 b6 8.de4 ab4 9.ab4 Ra1 10.Ba1 bc5 11.ed5 cb4 12.dc6 Nc6.

6.d3 b6 7.Nc3 a5 (7...bc5 8.bc5 ed3 9.Nf3 Na6 10.Bd3 Rb8 11.Ba6 Rb2 12.Bc8 Qc8; 7...ed3 8.Bd3 bc5 9.bc5 Nbd7 10.Nf3 Nc5 11.0–0 Rb8 12.Rb1 Bd6) 8.b5 Bc5 9.de4 de4 10.Qd8 Kd8 11.Nh3 Ke7 12.Rd1 Bf5.

6.d3 b6 7.de4 bc5 (7...Ne4 8.Nc3 Nc3 9.Bc3 bc5 10.a3 Nd7 11.Nf3 Nf6 12.Bd3 c4; 7...de4 8.Qd8 Kd8 9.Bf6 gf6 10.Nc3 f5 11.0–0–0 Kc7 12.Nh3 bc5) 8.ed5 (8.e5 Ne4 9.Nd2 cb4 10.Ne4 de4 11.Qa4 Be7 12.Ne2 Qc7) 8...cb4 9.dc6 (9.Nd2 Be7 10.a3 0–0 11.Ngf3 cd5 12.ab4 Bb4) 9...Qd1 10.Kd1 Ne4= 11.Ke1 Nc6 12.Nf3 Be6.

6.d3 Bf5 7.de4 Be4 8.Nd2 Be7 9.Ngf3 Bg6 10.Be2 0–0 11.0–0 b5? (11...Nbd7 12.Nd4=) 12.Nh4 (better is 12.a4!? ba4 13.Qa4+–) 12...Nbd7 (12...a5!? 13.Ng6 hg6+=) 13.Ng6 fg6 14.Bf3 a5 15.a3 Qc7 16.Qb3 (better is 16.Nb3!?+=) 16...Ne5= 17.Be2 Nc4 18.Bc3 (18.Nc4 dc4 19.Qc3 Rf7=) 18...Qa7 (18...Nd2 19.Bd2 Ne4 20.Ra2+=) 19.Nf3 (19.Nc4 bc4 (worse is 19...dc4 20.Qb2=) 20.Qc2 Ne4=) 19...a4 20.Qa2 Ne4 21.Bd4 Bf6 22.Qc2 Rae8 23.Bd3 Qc7 24.Ra2 Bd4 25.Nd4 (better is 25.Bc4!? Bf6 26.Bd3+=) 25...Ncd2–+ 26.Be4 Nf1 (26...Ne4?! 27.Qd3=) 27.Kf1 Re4 28.Qd3?? (better is 28.Kg1–+) 28...Qh2 29.Nf3 Qh1 (29...Qh1 30.Ng1 Rg4–+) 0–1. algernon (2440) – jnpp (2265), net–chess.com, 2015.

6.d3 Bf5 7.de4= Ne4 8.Nf3 (8.Nd2=) 8...h6 (8...a5!? 9.Nd4 Bg6+=) 9.Be2 (9.Nd4 Bg6+=) 9...Nd7 (9...a5 10.a3 ab4 11.ab4 Ra1 12.Ba1=) 10.0–0 Ndf6 (10...a5 11.Nd4 Bg6 12.f3=) 11.Nbd2 (11.Nd4 Bd7+=) 11...Be7+= 12.Ne4 Be4 13.Nd2 (13.Qd4!?+=) 13...Bh7 14.a4 a5 15.Bc3 (15.b5 Bc5 16.Rc1 Be7+=) 15...ab4+= 16.Bb4 0–0 17.Nb3 b6 18.Bd3 Bd3 19.Qd3 Nd7 20.Rfc1 bc5 21.Bc5 Bc5 (21...Ne5 22.Qc3 Bc5 23.Nc5=) 22.Nc5= Nc5 23.Rc5 Qb6 24.Qc2 Rfc8 25.a5 Qc7 26.Qa4 ½–½. Hal1958 – Abra, playchess.de, 2005.

6.Be2 b6 7.a3 bc5 8.bc5 Bc5 9.Qc2 Be7 10.Nc3 0–0 11.Nh3 c5 12.Ng5 h6 13.h4 hg5 14.hg5 Nh7 15.f4 Re8 16.Ne4 de4 17.Qe4 Nf8 18.Qe5 Bf6 19.Qe8 Qe8 20.gf6 g6 21.g4 Nbd7 22.g5 Nh7 23.Kf2 Bb7 24.Rh6 Qe4 25.Rg1 Ndf8 26.d3 Qf5 27.Be5 Re8 28.e4 Qd7 29.Bc3 c4 30.Bg4 Qd3 31.Bb4 Qd4 32.Kf1 Be4 33.Bf8 Nf8 34.Be2 Bd3 35.Rgh1 Qf4 36.Kg2 Re2 37.Kg1 Qf2# 0–1. Multisumus (1725) – Gely (2290), FICS rated standard game, 2013.

6.Ne2 a5 7.a3 ab4 (7...b6 8.cb6 ab4 9.ab4 Ra1 10.Ba1 Qb6 11.Bf6 gf6 12.b5 Qb5; 7...Be7 8.Nbc3 0–0 9.Nd4 Nbd7 10.Be2 Ne5 11.0–0 Bg4 12.f3 ef3; 7...Nbd7 8.Nbc3 Be7 9.Nf4 0–0 10.h4 Qc7 11.d4 ed3 12.Bd3 Ne5) 8.ab4 Ra1 9.Ba1 b6 10.cb6 Qb6 11.b5 Qb5 12.Bf6 gf6.

6.Ne2 b6 A) 7.Qc2 bc5 (7...Bb7 8.Nd4 bc5 9.bc5 Nbd7 10.Nc3 Nc5 11.Na4 Na4 12.Qa4 Qd7; 7...a5 8.cb6 ab4 9.Nf4 Bd6 10.a3 0–0 11.ab4 Ra1 12.Ba1 Qb6; 7...Qc7 8.Bf6 gf6 9.cb6 ab6 10.b5 Bd6 11.Nbc3 0–0 12.Rc1 Ba3) 8.bc5 Nbd7 9.Nd4 Bc5 10.Nc3 Bd4 11.ed4 0–0 12.Rb1 Qa5; B) 7.d4 ed3 (7...a5 8.a3 ab4 9.ab4 Ra1 10.Ba1 Be7 11.Nf4 g5 12.Nh5 0–0) 8.Nd4 a5 9.Bd3 ab4 10.cb6 Qb6 11.0–0 Nbd7 12.Nd2 c5; C) 7.Nbc3 bc5 8.bc5 Bc5 9.Rb1 0–0 10.Qa4 Qc7 11.Nd4 Bb7 12.Be2 Nbd7; D) 7.Qa4 bc5 (7...Bb7 8.Nd4 bc5 9.bc5 Bc5 10.Nc3 0–0 11.Be2 Nbd7 12.0–0 Qc7) 8.bc5 Bc5 9.Nbc3 Nbd7 10.Nd4 Bb7 11.Nc6 Bc6 12.Qc6 Rc8 ; E) 7.Bd4–/+ Na6 (7...bc5 8.bc5 Na6 9.Nbc3 Nc5 10.Nf4 Bd6 11.Na4 Ne6 12.Ne6 fe6; 7...Nbd7 8.Qc2 bc5 9.bc5 Rb8 10.Nf4 Qa5 11.Be2 Bc5 12.0–0 Bd4) 8.Qa4 bc5 9.Qc6 Bd7 10.Qa6 cd4 11.Nd4 Bb4 12.Nc3 0–0.

6.Ne2 Be7 7.Nbc3 (7.d3 ed3 (7...a5 8.de4 ab4 9.ed5 cd5 10.Nf4 0–0 11.Nd2 Nc6 12.Bd3 d4) 8.Qd3 (8.Nd4 a5 9.a3 ab4 10.ab4 Ra1 11.Ba1 Na6 12.Qa4 b5) 8...b6+= (8...0–0 9.Nd2 b6 10.Bd4 Nbd7 11.Rc1 Bb7 12.Nb3 a5) 9.Nd4 0–0 10.Nd2 bc5 11.bc5 Bc5 12.Be2 Bb4; 7.Nd4 Nbd7 (7...a5 8.a3 ab4 9.ab4 Ra1 10.Ba1 b6 11.Nc3 bc5 12.bc5 Bc5; 7...0–0 8.Nc3 Nbd7 9.Be2 a5 10.a3 Ne5 11.0–0 Bg4 12.f3 ef3; 7...Qc7 8.Nc3 0–0 9.Be2 Nbd7 10.0–0 Ne5 11.f4 ef3 12.Nf3 Nf3; 7...b6 8.Nc3 0–0 9.Be2 bc5 10.bc5 Qc7 11.Na4 Nbd7 12.Qc2 Ne5) 8.Nc3 a5 9.a3 Ne5 10.Be2 0–0 11.0–0 Bg4 12.f3 ef3) 7...b6 (7...Na6 8.a3 0–0 9.Nd4 Nc7 10.Qc2 g6 11.d3 Ne6 12.Ne6 ed3; 7...0–0 8.Nd4 a5 9.a3 Nbd7 10.Be2 Ne5 11.0–0 Bg4 12.f3 ef3; 7...Nbd7 8.Nd4 0–0 9.Be2 a5 10.a3 Ne5 11.0–0 Bg4 12.f3 ab4; 7...a5 8.a3 0–0 9.Nd4 Nbd7 10.Be2 Ne5 11.0–0 Bg4 12.f3 ef3) 8.Na4 (8.Nd4 Qc7 9.cb6 ab6 10.Qb3 0–0 11.Rc1 Qb7 12.Be2 c5) 8...b5 (8...bc5 9.Nc5 Nbd7 10.Nd4 Qc7 11.Na6 Ba6 12.Ba6 Bb4) 9.Nac3 a5 10.a3 a4 (10...0–0 11.Nd4+= Qc7 12.Be2 Nbd7) 11.Nd4 Nbd7?? (better is 11...Qc7= 12.d3 0–0) 12.Nc6+– Qc7 13.Ne7 Ke7 14.Nb5 Qc6 (14...Qb8 15.Rc1+–) 15.Nd4 Qc7 16.Nf5 Kf8 17.Nd6 Qb8 18.Bd4 Ke7 19.d3 Rd8 (19...Kf8 20.b5+–) 20.de4 de4 21.Bc4 Ba6 (21...Kf8 22.Rc1+–) 22.Qc2 (22.b5 Qc7 23.ba6 Nc5 24.Nf7 Nd3 25.Bd3 Kf7+–) 22...g6 (22...Qc7 23.Bd5! Rab8 24.Be4+–) 23.Ba6 (better is 23.b5 Bb7 24.Rd1 Qc7 25.Nb7 Qb7+–) 23...Ra6 24.Qc4 (24.Qc4 Rd6 25.cd6 Qd6 26.Rd1+–) 1–0. Vukovic,L (1950) – Pribicevic,Stefan, Winter Open, Belgrade SRB, 2008.

6.h3 Be7 (6...a5 7.a3 b6 8.Nc3 bc5 9.b5–/+) 7.d3 (7.Nc3 a5 8.a3 b6+=) 7...Bf5 (better is 7...a5!? 8.a3 0–0–/+) 8.de4+= Be4 9.Nf3 Nbd7 10.Be2 0–0 11.0–0 h6 (11...a5!? 12.a3 ab4 13.ab4 Ra1 14.Ba1 Qc7=) 12.Nbd2= b5 (12...Qc7 13.Nd4=) 13.Ne4 Ne4 14.Bd3 (14.a4 a6+=) 14...Bf6 15.Bf6 Ndf6 16.Be4 Ne4 17.Qd3 (17.Nd4!? Qd7 18.Qe1=) 17...a5+= 18.a3 Qc7 19.Nd2 Nd2 20.Qd2 Ra7 21.Qd4 Re8 22.Qc3 Re4 23.Rfc1 Rc4 24.Qd2 Qe5 25.Rc4 Qa1 (better is 25...bc4 26.Rb1 ab4 27.Qb4 Qe4+=) 26.Rc1? (better is 26.Qc1 Qc1 27.Rc1 ab4 28.ab4+=) 26...Qa3–+ 27.Rb1? (better is 27.ba5 Ra5 28.Rc3–+) 27...ab4 28.Qb4 (28.Rb4 Qa1 29.Kh2 Ra2–+) 28...Qb4 29.Rb4 Ra4 (29...Ra1 30.Kh2–+) 30.Rb1 Rc4 31.Kf1 Rc5 32.Rb2 Rc4 33.Ke2 b4 34.g4 c5 35.f3 d4 36.ed4 Rd4 37.Ke3 Rc4 38.h4 (38.Rd2 b3–+) 38...g5 39.hg5 hg5 40.Rb3 f6 41.Kd3 Rf4 (41...Rd4 42.Kc2–+) 42.Ke3 (42.Kc2 Kf7 43.Re3 c4–+) 42...Kf7 43.Rb1 (43.Kd2 Ke6–+) 43...Ke6 44.Rb3 (44.Rf1 c4 45.Kd2 Kd5–+) 44...Kd5 45.Rb1 Kc6 0–1. Hal1958 – Abra, playchess.de, 2005.

5.cd5 cd5

6.a3 b6 7.d3+= Nf6 (7...Qd7 8.de4 de4 9.Nc3 Qd1 10.Rd1+–) 8.de4+/– Ne4 9.Bb5 Bd7? (better is 9...Ke7+/–) 10.Qd5+– Nc6 (10...Nd6 11.Nc3 Nb5 12.Nb5 Bb5 13.Qe4 Be7 14.Qa8 Bc6 15.Qa7 Bg2–/+) 11.Bc6 Rc8 (11...Nf2 12.Bd7 Ke7 13.Kf2+–) 12.Bd7 Qd7 13.Qe4 Qe7 14.Qf5 Rd8 15.Nc3 f6 16.Nf3 Qc7 17.Nd5 Qd7 18.Qh5 Qf7 19.Nc7 Ke7 20.Qf5 Rd7 (20...Qc4 21.Rc1 Qa2+–) 21.Qe4 Kd8 22.Ne6 Kc8 23.Qa8 1–0. "lasker" (2055) – conny, internet, 2007.

6.a3 Nc6 7.b5 Na5 (7...Nce7 8.Nc3 (8.d3 Bf5 9.de4 de4 10.Nd2 Nd5 11.Ne2=; 8.Ne2 Bg4 9.d3 Qa5 10.Nbc3 Rd8 11.Qd2=) 8...Nf6 9.d3 Be6 10.Nge2 Qb6 11.Nf4+=; 7...Nb8 8.Qc2 (8.d3 Nd7 9.Nd2 Nc5 10.de4 de4 11.Rc1=; 8.Ne2 Nf6 9.Bf6 Qf6 10.Nbc3 Be6 11.d3=) 8...Bd7 9.Nc3 Nf6 10.d3 Qa5 11.Qd2=; 7...Qb6 8.Qb3 (8.Ra2 Nce7 9.d3 Be6 10.Qa4 Nf5 11.de4=; 8.f3 Nce7 9.Qa4 Nf6 10.Nc3 Bf5 11.Rc1=; 8.Qa4 Qa5 9.Nc3 Qa4 10.Na4 Na5 11.d3=; 8.Nc3 Nce7 9.d3 Bf5 10.Nge2 Nf6 11.Ng3+=) 8...Be6 9.f3 ef3 10.Nf3 Rc8 11.Be2+=) 8.d3 (8.Bc3 Nc4 9.d3 Nd6 10.de4 de4 11.Ra2=; 8.Qa4 Bf5 9.Bd4 Nf6 10.Nc3 Be7 11.Rd1=) 8...Bf5 (8...ed3 9.Bd3 Nc4 10.Bc4 dc4 11.Qd8=) 9.Nc3 (9.de4 Be4 10.Nc3 Nf6 11.Ne4=) 9...Nf6 (9...ed3 10.Bd3 Bd3 11.Qd3=) 10.de4 de4 11.Be2 (11.Qa4=) 11...Rc8 (11...Be6 12.Qa4 Bb3 13.Qd4+=) 12.Qd8 Rd8 13.Rd1 Rd1 14.Nd1 Be7 15.Bc3 b6 16.Bb4 (16.Bb2!?=) 16...Bb4–/+ 17.ab4 Nb7 18.Nc3 0–0 19.Nh3 Rc8 20.Kd2 Bh3 21.gh3 Nd6 22.Ra1 Rc7 23.Rd1 g6 24.Kc2 Nf5 25.Bg4 Ne7 (worse is 25...Ng4 26.hg4 Nh6 27.h3=) 26.Kb3 Kg7. Psion – Psion, 4 Min/Zug, 1989.

6.a3 Nc6 7.Nc3 A) 7...Be6 8.d3 (8.b5 Na5 9.d3 ed3 10.Bd3 Nc4 11.Bc4= ; 8.Nge2 Bg4 9.Qa4 Nf6 10.Rc1 a5 11.b5=) 8...Nf6 9.de4 de4 10.Qc2 Bf5 11.Rd1+=; B) 7...Bf5 8.d3 (8.Rc1 Nf6 9.Nge2 Rc8 10.d3 ed3 11.Ng3= ; 8.Nge2 Nf6 9.Ng3 Bg4 10.Qa4 Bd6 11.d3=; 8.b5 Na5 9.d3 Nf6 10.de4 de4 11.Qa4=; 8.Qa4 Nf6 9.Nge2 a6 10.Rc1 Bd6 11.Ng3=) 8...Nf6 9.de4 de4 10.Nge2 Rc8 11.Qa4= ; C) 7...Be7 8.d3 (8.b5 Na5 9.d3 ed3 10.Bd3 Nf6 11.Qa4= ; 8.Qa4 Nf6 9.d3 ed3 10.Bd3 0–0 11.Nce2=) 8...Nf6 9.b5 Na5 10.de4 de4 11.Qa4+=; D) 7...a6 8.d3 (8.Qc2 Nf6 9.d3 Bf5 10.Rd1 Bd6 11.de4=) 8...Nf6 9.de4 de4 10.Qd8 Nd8 11.Nge2+=; E) 7...Nf6 8.b5 (8.d3 Bg4 9.Qc2 d4 10.ed4 Nd4 11.Qa4= ; 8.Rc1 Bd6 9.d3 a5 10.b5 Ne5 11.de4=; 8.Qa4 Bd6 9.d3 0–0 10.de4 de4 11.Rd1=) 8...Na5 9.d3 Bf5 10.de4 de4 11.Qa4=.

6.a3 Nc6 7.d3 A) 7...Nf6 8.de4 Ne4 9.Nf3 Bg4 10.Be2 Rc8 11.0–0+=; B) 7...Bf5 8.Nc3 (8.Ne2 Nf6 9.de4 Be4 10.Nbc3 Bd6 11.Nd4= ; 8.b5 Nce7 9.de4 de4 10.Nd2 Qa5 11.Bc4=; 8.de4 de4 9.Nd2 Nf6 10.b5 Nb8 11.Ne2+=; 8.Nd2 ed3 9.Ngf3 Qb6 10.Nb3 a5 11.Bd3=) 8...Nf6 9.de4 de4 10.Nge2 a5 11.b5+= ; C) 7...Qe7 8.Nd2 (8.de4 de4 9.Nd2 Bf5 10.Qa4 Nf6 11.Bb5+= ; 8.Nc3 Nf6 9.de4 de4 10.Rc1 Bd7 11.b5=; 8.Ne2 Bg4 9.h3 Ne5 10.de4 de4 11.Be5=) 8...Bf5 9.de4 de4 10.Qa4 Nf6 11.Rc1+=.

6.a3 Nc6 7.Ne2 Bf5 (7...Nf6 8.Bf6 Qf6 9.Nbc3=) 8.Ng3 Bg6 9.b5 Nce7 (9...Na5 10.Qa4 b6 11.h4=) 10.Be2+= Nf6 11.0–0 Qd6 (11...Nf5!?+=) 12.d3+/– 0–0–0 (12...ed3!? 13.Bd3 h5 14.Bg6 Ng6+=) 13.de4+– de4 14.Qa4 Kb8 15.Rd1 Qb6? (better is 15...Ned5 16.Nc3 Be7+–) 16.Be5 Ka8 17.Nd2 Nd7 (17...Rd5 18.Nc4 Qe6+–) 18.Nc4 Ne5 (18...Qe6 19.Rd6 Qd6 20.Bd6 Nd5+–) 19.Nb6 (19.Ne5?! Nd5 20.Ng6 fg6 21.Ne4 Be7+–) 19...Kb8 20.Rd8 Nc8 (20...Kc7 21.Qd4 Nf3 22.Bf3 Nd5 23.Rd7 Kb8 24.Qd5 ab6 25.Qb7) 21.Rc8 1–0. Pamieci Krzysztofa P – napohybel, internet, 2016.

6.a3 f5 7.Nc3 Nf6 8.Rc1 Be6 (8...Bd6 9.Nge2 Nc6 10.Nb5+=) 9.Nb5 (9.Nh3+=) 9...Bd6 (better is 9...Nc6!?+=) 10.Bf6+– gf6 11.Nd4 Bd7 12.Qh5 Ke7 13.Bb5 Nc6 14.Nf5 (14.Nc6?! bc6 15.Bc6 Rc8=) 14...Bf5 15.Qf5 Rc8? (better is 15...Qg8 16.Ne2 Qe6+–) 16.Qd5 Qb6 (16...Qg8 17.Qe4 Qe6+–) 17.Bc4 Nd8 (17...Be5 18.Qe4 Kd8 19.Nf3+–) 18.Qe4 Be5 19.d4 Rc4 (19...Nf7 20.de5 Ne5+–) 20.Rc4 Qb5 (20...Qe6 21.de5 Qe5 22.Rc7 Kf8 23.Qe5 fe5 24.Nf3+–) 21.Rc5 Qa4 22.de5 Qa3 23.ef6 Kf6 24.Rf5 Kg6 (24...Kg7 25.Qg4 Kh6 26.Rf6) 25.Qg4 Kh6 26.Rf6 1–0. Janek – loser, internet, 2016.

6.a3 f5 7.d3 Nf6 8.Ne2 Be6 (8...Bd6 9.Bf6 Qf6 10.Nbc3+=) 9.Nd4 Qd7 10.de4 fe4 11.Bb5 Nc6 12.Qa4 Rc8 13.Ne6 Qe6 14.Qa7 Bd6 (14...Qd7 15.Qb6+/-) 15.Qb7 0–0 16.Nc3 Be5 17.Rc1 d4? (better is 17...Nb8 18.0–0 Rc7+/-) 18.Nd1 Qb3 (18...Ne7 19.Rc8 Nc8 20.Bd4 Nd6+–) 19.Bc4 (19.Bc4 Qc4 20.Rc4+–) 1–0. Fournier,Frederic (2570) – piter07 (2115), Active (4/2), 2004.

6.a3 Nf6 (--> 4.a3 Nf6 5.c4 c6 6.cd5 cd5).

6.Qa4 Nc6 7.b5 Nb8 8.Nc3 Nf6 9.d3 Bf5 10.de4 de4 11.Rd1 Qb6 (better is 11...Nbd7!?=) 12.Nd5+/– Nd5 13.Rd5 Be6 (13...Qg6 14.Ne2 Nd7 15.Nf4+–) 14.Bd4 Qc7 15.b6 Qc6 16.Bb5 Bd5 17.Bc6 Nc6 18.Qb5 (18.Ne2!? a6+–) 18...Be6 (18...Bb4 19.Kf1 Ba2 20.ba7+/–) 19.ba7 Bb4 20.Kf1 0–0 21.Qb7 Rfc8 22.g3 Ba5 (22...Ba2 23.Kg2 Bd5 24.Nh3+–) 23.Kg2+– Nd4 24.ed4 Rd8 25.Ne2 (25.Qe4? Bd5 26.Qd5 Rd5–+) 25...e3 (25...Bd5 26.Qa6 Bd2 27.Nf4 Bf4 28.gf4 e3 29.f3+–) 26.Qa6 (26.Nf4 Bc8 27.Qa8 Bh3 28.Kh3 Ra8+–) 26...Bd2 27.Rb1 Bd5 28.f3 g6 (28...g5 29.Rb8! Rdb8 30.ab8R Rb8+–) 29.Nf4 e2 (29...Kg7 30.Rb8! e2 31.Nd5 Rdb8 A) 32.ab8R?? Ra6 33.Rb1 e1Q 34.Re1 Be1–+; B) worse is 32.ab8Q e1N (32...Rb8 33.Qe2 Rb2 34.Qe5 Kg8 35.Nf6 Kg7 36.Kh3+–) 33.Kf1 Ra6+–; C) 32.Qf6 Kg8 33.Ne7 (33.ab8B?! e1Q 34.Ne7 Kf8 35.Ng6 hg6 36.Bd6 Ke8 37.Qh8 Kd7 38.Qa8 Qe2 39.Kh3 Qe6 40.Kg2 Kd6=; 33.ab8Q Rb8 34.Ne7 Kf8+–) 33...Kf8 34.Nc6+– (34.ab8B?! e1Q 35.Ng6 hg6 36.Bd6 Ke8 37.Qh8 Kd7 38.Qa8 Qe2 39.Kh3 Qe6 40.Kg2 Kd6=; 34.ab8Q Rb8 35.Nf5 gf5 36.Qh8 Ke7 37.Qe5 Kd7 38.Qf5 Kd8 39.Qf6 Ke8 40.Qc6 Ke7 41.Qc7 Ke6 42.Qc4 Kf6 43.Qe2 Rb2+–)) 30.Nd5 e1Q 31.Re1 Be1 (31...Rd5 32.Re8! Re8 33.a8Q+–) 32.Nb6 Bc3 (32...Rd6 33.Qb7 Ra7 34.Qa7+–) 33.Na8 Ra8 34.Qb7 Ra7 35.Qa7 Bd4 36.Qd4 (36.Qd4 h6 37.a4+–) 1–0. DEFFM – GuestYBMB, freechess.org, 2017.

6.Qa4 Bd7 7.Bb5 Bb5 8.Qb5 Qd7 9.Qd7 Nd7 10.Nc3 Ngf6 11.a3 Be7 12.Nge2 Ne5 13.Nd5?? (better is 13.Nf4 Nc4 14.Ra2+=) 13...Nd3–+ (13...Nd5 14.Be5 0–0 15.Nc3 Nc3 16.dc3+/–) 14.Kf1 Nd5 (14...Nb2?! 15.Nc7 Kd7 16.Na8 Ra8 17.Nc3–/+) 15.Bg7 Rg8 16.Bd4 b6 (16...Bf6 17.f3 ef3 18.gf3–+) 17.Nc1 (17.Ng3 Bf6 18.Ne4 Bd4 19.ed4 Kd7–+) 17...Nc1 18.Rc1 Kd7 19.f3 f5 20.fe4 fe4 21.g3 Rac8 (better is 21...a5!? 22.ba5 Ra5 23.Ke2–+) 22.Ke2 Rc1 23.Rc1 Bd6 24.b5 (24.d3!? ed3 25.Kd3–+) 24...Rc8 (24...Ba3?! 25.Ra1 Be7 26.Ra7 Ke6 27.Rb7–/+) 25.Rc8 Kc8 26.a4 (26.Bb2 Bc5–+) 26...Nb4 27.Bc3 Nd3 28.a5 (28.Bd4 Kd7–+) 28...Kd7 (28...Kc7!? 29.a6–+) 29.ab6 ab6 30.Bd4 Bc5 31.Bf6 Ke6 32.Bd8 Kd5 33.g4 Ne5 34.h3 Kc4 35.Bf6 Nd7 (35...Nd7 36.Bg7 Bf8–+) 0–1. rstilt (2340) – mgilbert (2525), net–chess.com, 2015.

6.b5 b6 7.a4 (better is 7.Ne2!?+=) 7...Nf6+= 8.Qc2 Bb7 9.f3 (9.Ne2 Nbd7+=) 9...ef3 (9...Bd6!?–/+) 10.Nf3= Bc5 (10...Nbd7 11.Bd4=) 11.Be2 (11.a5 0–0+=) 11...0–0 (11...Nbd7 12.Nc3=) 12.0–0 (12.a5 Qd6 13.a6 Bc8+/–) 12...Ne4 (12...Nbd7 13.Nc3=) 13.Nd4 Qh4?? (13...Nd7 14.Nc3 Ndf6 15.Ne4 Ne4 16.d3=) 14.Rf4?? (14.Nf5 Qg5 15.Bg7 Re8+–) 14...Qg5?? (better is 14...Qe1 15.Rf1 Qh4=) 15.Nf3?? (better is 15.Rg4 Qf6 16.Nf5+–) 15...Qe7?? (better is 15...Qf4! 16.Qc5 Qh2 17.Kh2 Nc5–+) 16.Nc3 Nc3 (better is 16...Rc8 17.Qd3 Nd2=) 17.Qc3+/– (worse is 17.Bc3 Be3 18.de3 Qe3 19.Kh1 Qf4–+) 17...f6 18.Nd4 Nd7 (18...Bd4!? 19.Rd4 Qf7+/–) 19.Nf5+– Qe6 (better is 19...Qd8 20.d4 Be7+–) 20.Nd4?? (better is 20.Bg4 Kh8 21.d4+–) 20...Qe8 (20...Qe7 21.Nc6 Qf7 22.Qd3+–) 21.Bg4 (21.Nc6!? Bd6 22.Rd4+=) 21...Ne5+= 22.Be6 Kh8 23.Rh4?? (better is 23.Re1+=) 23...Ng6–+ 24.Rh7 (24.Ba3 Ba3 25.Rh7 Kh7 26.Qa3 Nh4–+) 24...Kh7 25.Bf5 Bd4 (better is 25...Bc8!? 26.Bc2–+) 26.Qd4 Kg8 (26...Kg8 27.Qg4 Ne5 28.Be6 Rf7 29.Be5 Bc8 (29...fe5?? 30.Rf1 Qe6 31.Qe6+–) 30.Bc8 Rc8–/+ (30...Qe5?! 31.Rf1=; 30...fe5? 31.Be6 Kf8 32.Rc1+–)) 0–1. GuestCNQL – GuestYCKC, freechess.org, 2017.

6.b5 f6 7.Qh5 g6 8.Qd1 Bd6 9.Be2 Nh6 10.d3 Be5 (10...Nf7 11.de4 de4 12.Qa4+=) 11.d4 (11.Be5!? ed3 12.Bc3 de2 13.Ne2+/–) 11...Bd6 12.h3 (12.Nc3 Be6+=) 12...0–0 13.f3?? (13.Nc3!? Be6 14.Qb3=) 13...f5 (13...Nf5 14.g4 Ne3 15.Qb3 ef3 16.Qe3 fe2 17.Nc3–+) 14.Nd2? (better is 14.Qb3!? Qh4 15.Kd1–/+) 14...Qh4–+ 15.Kf1 Nd7 (15...Ng4 16.fg4 fg4 17.Bf3 ef3 18.gf3 gh3 19.Qb3–+) 16.Qe1 (16.Qb3 Nf6 17.f4 Qg3–/+) 16...Qe1 (better is 16...Bg3!? 17.Qd1 Ng4 18.fg4 fg4 19.Bf3 gf3 20.gf3 Qg5–+) 17.Ke1+= Bg3 18.Kd1 Nf6 19.Nb3 (19.Ba3 ef3 20.Bf3 Re8+=) 19...Bd7 (19...f4!? 20.ef4 Nf5–/+ (20...Bf4?! 21.Bc1 e3 22.Bd3+=)) 20.Nc5= b6 21.Nd7 Nd7 22.Kd2 Rac8 23.Bd1 Rc7 (23...f4!? 24.Bb3 Nf6=) 24.Bb3 Nf6 25.Ne2 Bd6 26.f4 (26.Rhc1 Rfc8+=) 26...Rfc8 27.a3 Nf7 (better is 27...Kf7!?=) 28.Nc3+/– Nh5? (28...Kg7!?+/–) 29.Bd5 (better is 29.Nd5!? Rb7+–) 29...Ng3 30.Rhe1 Kg7 31.Bc6 Nd8 32.Nd5 Rc6? (better is 32...Nc6 33.Nc7 Na5 34.Ne6 Kf7 35.Ng5 Ke7+=) 33.bc6+– Nc6 34.Rac1 Kh6 (34...Kf7 35.Nb4! Ne7 36.Rc8 Nc8 37.Rc1+–) 35.Nf6 Be7? (35...b5+–) 36.Nd5 (better is 36.d5 Bc5 37.dc6 Rc6+–) 36...Bh4?? (36...Bd6 37.Rc3 Bb8+–) 37.Nb4 Nh5? (better is 37...Ne7+–) 38.Rc6 Be1 39.Ke2 (better is 39.Ke1 Rc6 40.Nc6+–) 39...Rc6+/– 40.Nc6 Bh4 41.d5 g5 42.d6 (better is 42.fg5!? Kg5 43.d6+–) 42...gf4+= 43.d7 (43.Be5 Ng3 44.Kd1 fe3+/–) 43...fe3 (43...Ng3 44.Kf2 Nh5 45.Ke2 Ng3 46.Kf2 Nh5 47.Ke2=) 44.d8Q (44.Ke3!? Bg5 45.Kd4+/–) 44...Bd8 45.Nd8 f4 46.Nf7 Kg6 47.Nd6 Ng3 48.Ke1?? (better is 48.Kd1+=) 48...e2 (better is 48...f3 49.gf3 ef3–+) 49.Bd4 (better is 49.Be5!? Kg5 50.Nc8+/–) 49...f3= 50.gf3 (50.Bc3 fg2 51.Kf2 Nf1 52.Kg2 Ne3 53.Kg3 Nd5+/–) 50...ef3+= 51.Bf2 Nh1 52.Ne4 (better is 52.Be3!?=) 52...Kf5–/+ (52...Nf2? 53.Kf2 a5 54.a4+–) 53.Ng3 (53.Nc3!? Kf4 54.a4–/+) 53...Ng3–+ 54.Bg3 h5 (54...a6 55.Kf2 Ke4 56.Bc7+=) 55.Bf2 (better is 55.Bb8+=) 55...Kf4–+ 56.Kd2 h4?? (better is 56...a6–+) 57.Bh4+= Ke4 (better is 57...b5+=) 58.Bf2+– Kf4 59.h4 Kf5 (59...b5 60.h5 (worse is 60.Ba7 Ke5+–) 60...Kg5 61.Ba7 Kh5 62.Bf2+=) 60.Ke3 Kg6? (better is 60...Kg4+–) 61.Kf3 e1Q 62.Be1 1–0. GuestGCXZ – herculanum, freechess.org, 2017.

6.b5 Nf6 7.Ne2 Bd6 8.h3 (8.d3 0–0+=) 8...Nbd7 9.Nd4 Nc5 (9...0–0 10.Be2+=) 10.Qc2 (10.Be2 0–0+=) 10...0–0 11.Be2 Be6 (11...Bd7 12.Nc3+=) 12.0–0 (12.Nc3 Rc8+=) 12...Rc8 13.Nc3 Bb8 (13...Qb6 14.a4+=) 14.Ne6 (14.Rac1!?=) 14...Ne6+= 15.Qb1 Qd6 16.g3 h5 (16...Qe5 17.b6 a6 18.a4+=) 17.h4 Qe5 18.Qd1 (18.b6 a6+=) 18...Qf5 (18...d4 19.Na4–/+) 19.Kg2 (19.d3!?+=) 19...d4–/+ 20.ed4 Nd4 21.Rc1 Rcd8 (21...Rfd8 22.a4–/+) 22.Ba1 (22.a4 Rfe8–/+) 22...Rd7 23.a4 (23.Bc4 Nf3 24.d3 Ne5 25.Ne4 Ne4 26.Be5 Qe5=) 23...Rfd8 24.Nb1 Be5 25.Bd4 Bd4 (25...Rd4 26.a5–/+) 26.Qc2 (26.f3 Be3!–/+) 26...Qe5 (26...Qg6 27.Rfe1–/+) 27.Qb3 (27.f3 Bb6 28.Qc3 Qc3 29.dc3 Bc7+=) 27...Bb6 28.Rc4 Ba5 29.Qe3 Bb6 (29...Qe6 30.Rfc1–/+) 30.Qb3 g6 (30...Rd5 31.Rc2–/+) 31.Qc2 Ba5 (31...Bd4 32.f3+=) 32.Rc8 (32.Rd1 Rd4+=) 32...Qd4 (32...Rc8 33.Qc8 Kg7 34.Qc2–/+) 33.Rd8 (33.Rc4 Qb6+=) 33...Rd8 34.Rd1 (34.f3 Bd2 35.fe4 Ba5+=) 34...Bb6–/+ 35.Rf1 Ba5 (35...Rd7 36.f3–/+) 36.Rd1 Ng4 37.Bg4 hg4 38.Re1 f5 39.Rd1 (39.Re2 Qd3 40.Qa2 Kg7 41.Qb2 Kh6–/+) 39...Kg7 (39...Bb6 40.Qb3 Kg7 41.Rf1–/+) 40.Kg1 (40.Re1 A) worse is 40...Bd2 41.Rd1 e3 42.fe3 Qe3 43.Rd2 (worse is 43.Nd2 Kh6=) 43...Rd2 44.Nd2+/–; B) 40...Rd7–/+) 40...Bb6 41.Rf1 Qd3 42.Qb2 (42.Qc3 Qc3 43.dc3 f4–/+) 42...Bd4 43.Qb4?? (better is 43.Qa3 Bf6 44.Qc5–/+) 43...Qg3 0–1. Haschka,Peter (1760) – Walther,Hans_Wolfgang (2125), Korenov Czech Republic, USIC Championsh, 2017.

6.b5 Qg5 7.Ne2 Nf6 8.Qc2 (better is 8.Bf6 Qf6 9.Nbc3=) 8...Be7?? (better is 8...Nbd7+=) 9.Qc8+– Bd8 10.Qb7 0–0 11.Qa8 Nbd7 (11...Bb6 12.Bf6 Qf6 13.Nbc3+–) 12.Qa7 Bb6 13.Qb7 (better is 13.Qa3 Nc5 14.Nd4 Nfd7+–) 13...d4 (13...Nc5 14.Qb6 Nd3 15.Kd1 Nf2 16.Kc1 Rc8 17.Nbc3 Nh1+–) 14.Bd4 (14.Nd4 Rb8 15.Qc6 Nc5+–) 14...Qb5 15.Nbc3 Qa5 16.Bb6 Nb6 17.Ne4 Nc4 18.Nf6 gf6 19.Nc3 Na3 20.Bd3 Rd8 21.Bh7! Kh7 22.Qf7 Kh8 23.Qf6 Kg8 24.0–0 Qh5 1–0. GuestWGRZ – GuestMGFM, freechess.org, 2017.

6.Bb5 Nc6 7.Ne2 a6 8.Bc6 bc6 9.0–0 Nf6 (9...Bb4?? 10.Bg7 Qh4 11.Bh8+–) 10.f3 Bb4 11.fe4 de4 (better is 11...Ne4!? 12.d3 Nf6 13.Bf6 gf6=) 12.Bf6+/– gf6 13.Qa4 Qd6 14.a3 Bc5 15.Qe4 Be6 16.Rf6 (16.d4 Bb6 17.Ng3+/–) 16...0–0–0 (better is 16...Qd5!? 17.Nbc3 Qe4 18.Ne4 Be7+/–) 17.d4+– Ba7 18.Nbc3 Bb8 (18...Kd7 19.Nf4 Qe7 20.Rh6+–) 19.Nf4 Rhg8 (19...Kd7 20.Qf3 Qc7 21.Na4+–) 20.Rb1 (better is 20.Qd3 c5 21.d5 Qb6+–) 20...Rg4?! (20...Bc7+–) 21.Rb6 (21.Re6?! fe6 22.Na4 Ba7+/–) 21...Rdg8 (21...Kc7 22.Qb1 Kc8+–) 22.Rc6 (22.Rc6 Qc7 23.g3+–) 1–0. DEFFM – GuestSKMoui, freechess.org, 2017.

6.Bb5 Nc6 7.Ne2 a6 8.Bc6 bc6 9.Qc2 Bd7 (9...Bb4?? 10.Bg7 (10.Qc6?! Bd7 11.Qd5 f5+–) 10...Ne7 11.Bh8+–) 10.a4 (better is 10.0–0+=) 10...Bb4?? (better is 10...Rb8–/+) 11.Bg7+– f6 12.Bh8 Kf7 13.0–0 Nh6 14.Bf6! Qf6 (14...Qf6 15.Nbc3 Combination; 14...Kf6 15.Qb2 Double attack (15.Qb2 Decoy)) 15.f3?? (better is 15.Nbc3 Bf5 16.Rab1+–) 15...Qa1= 16.fe4 Kg7 17.Nbc3 Qa3 18.ed5 Bc3 19.Nc3 cd5 20.Nd5 Ba4?? (better is 20...Rf8 21.Qc3 Qc3 22.Nc3 Rb8=) 21.Qe4 (better is 21.Qc7 Kh8 22.Qe5 Kg8 23.Ne7 Qe7 24.Qe7 Bb3+–) 21...Rf8 (21...Nf7 22.Qe6 Be8+–) 22.Qe5 Kg6 (22...Kg8 23.Ne7 Qe7 24.Qe7 Rf1 25.Kf1 Nf7+–) 23.Ne7 1–0. GuestHVTN – systemua, freechess.org, 2017.

6.Bb5 Nc6 7.Ne2 Bb4?? 8.Bg7 a6 9.Bc6 (9.Bh8?! ab5 10.Nbc3 Bg4+–) 9...bc6 10.Bh8+–.

6.Bb5 Nc6 7.Ne2 Bd7 8.Bc6 (8.a3 a5=) 8...Bc6 9.Nd4 Bb4?? (better is 9...Bd7=) 10.Nc6+– bc6 11.Bg7 f6 (11...Qg5 12.Bh8 Qg2+–) 12.Bh8 Qe7 13.Qh5 Kd8 (13...Qf7 14.Qh4+–) 14.a3 (14.Nc3!? Bc3 15.dc3 Rb8+–) 14...Bd6 15.0–0 h6 16.f3 (16.Qg6!? Kd7 17.Nc3 Qe8 18.Qh7 Qe7+–) 16...Qh7 (16...Be5 17.Nc3 Qh7 18.fe4 de4 19.Bf6 Bf6 20.Qc5+–) 17.fe4 Qh8 18.ed5 Be5 (18...Ne7 19.dc6 Rc8 20.Qa5 Rc7 21.Nc3+–) 19.Nc3 (19.d4 Bd6 20.Qf7 Rc8+–) 19...cd5 (19...c5 20.Ne4 Ba1 21.Qf7+–) 20.Rab1 (better is 20.d4 Rc8 21.de5 Rc3 22.ef6 Nf6 23.Qe5+–) 20...Bc3 (20...Rc8 21.Qf3 Ke8 22.Rb7+–) 21.dc3 (21.Qd5 Ke7 22.Rb7 Ke8 23.Qe6 Ne7 24.Qe7) 21...Qg7 (21...Ne7 22.Qf7 Qe8 23.Qf6 Qc6 24.Qc6 Nc6 25.Rf8 Kc7 26.Ra8 a5+–) 22.Qd5 1–0. GuestHVTN – Serthink, freechess.org, 2017.

6.Qc2 Bb4?? 7.Bg7+– d4 (7...Nc6 8.Bh8 Be6 9.Nc3+–) 8.Qe4 Ne7 9.Bh8 de3 (9...Nbc6 10.Bb5+–) 10.fe3 (10.fe3 Nbc6 11.Bb5+–) 1–0. GuestMZPM – GuestFRKL, freechess.org, 2017.

6.Qc2 Bd7 7.Nc3 Be6 (7...Bb4? 8.Nd5 Ne7 9.Bg7 Nd5 10.Qe4 (10.Bh8?! f5+–) 10...Ne7 11.Bh8+– (11.Qb4?! Rg8 12.Qb7 Bc6+–); 7...Nf6 8.a3 Bd6 9.Nd5 Nd5 10.Bg7 Rg8 11.Qe4 Ne7=) 8.d3 (8.a3 a5 9.b5 Qh4 10.d3 Nf6 11.de4 de4+=) 8...Nf6 (8...ed3 9.Bd3 Bb4 10.a3= (10.Nf3 Nf6 11.a3 Be7+=) 10...Ba5 11.Nf3 Nf6=; 8...Bb4 9.de4 Nf6 10.0–0–0 Bc3 11.Bc3 Nbd7+=) 9.de4 (9.a3 Bf5 10.de4 de4 11.Nf3 a5+=) 9...de4 (9...Bb4!? 10.0–0–0 Bc3 11.Bc3 Nbd7 12.ed5 Bd5 13.Bf6 Nf6 14.Qa4 Kf8–/+) 10.a3+= Bd5?? (better is 10...Bf5+= 11.Nf3 a5+=) 11.0–0–0+– (11.Nd5?! Qd5 12.Bf6 gf6+–) 11...Na6 (11...Nbd7 12.Nd5 Nd5 13.Rd5 Rc8+–) 12.Bb5 (better is 12.Nd5 Bd6 13.Nf6 gf6 14.Ba6+–) 12...Ke7 (12...Bc6 13.Rd8 Rd8 14.Bc6 bc6 15.Ne4 Nd7+–) 13.Nd5 Nd5 14.Qe4 Kd6 15.Qe5 1–0. marekt – RisingFast, ChessWorld.net, 2016.

6.Nc3 Bb4 7.Qb3 Bc3 8.Bb5 Nd7 9.Bc3 –/+.

6.Nc3 Be6 7.a3 (7.Bb5 Nc6 8.Qa4 Qb6+=) 7...a6 (7...Nc6 8.Bb5=) 8.Nge2 (8.d3 Nf6=) 8...Nc6 9.Nf4 Nf6 10.b5 (10.Ne6 fe6 11.d3 ed3 12.Bd3 Bd6=) 10...ab5 (10...Bg4 11.f3 d4 12.ed4 (12.fg4?! dc3 13.dc3 ab5=; 12.bc6?! dc3 13.Bc3 Bc8+/–; 12.Ne4 Ne4 13.bc6 Qh4 14.Ke2 Qf2 15.Kd3 Nc5 16.Kc2 Bf5 17.e4 Be4 18.fe4 Qf4+=) 12...ef3 13.gf3 Qe7 14.Kf2+–) 11.Bb5 Bd6 12.Nfd5?? (better is 12.Ne6 fe6 13.d3 ed3 14.Qd3=) 12...Bd5 13.Nd5 Nd5 14.Qc2 0–0 15.Bc6 (15.Qe4 Nf6 16.Qf5 Ne7–/+) 15...bc6 16.Qc6 Nf6 17.g3 (17.0–0 Bh2! 18.Kh1 Bd6–+) 17...Qd7 (better is 17...Rc8!? 18.Qa4–+) 18.Qd7 Nd7 19.Ke2 Nc5 20.Rhd1 (20.Rhc1 Nb3 21.Rc6 Na1 22.Rd6 Nc2–+) 20...Rfb8 (better is 20...Nd3 21.Rdb1–+) 21.Ra2?! (21.Rdb1 Nd3 22.Bd4 Rb1 23.Rb1 Ra3–+) 21...Nd3 22.Bc1 Rb1 23.Rc2 Rc1 (23...Ba3 24.Ba3 Rd1 25.Kd1–/+) 24.Rdc1 Nc1 25.Rc1 Ba3 26.Ra1 Ra7 (26...h6 27.d4–+) 27.d3 ed3 28.Kd3 Bc5 29.Ra7 Ba7 30.f4 f6 31.Ke2 (31.e4 Kf7–+) 31...Kf7 (31...f5 32.h3–+) 32.Kf3 Ke6 33.h3 g6 34.e4 Bd4 35.g4 h6 36.Kg2 g5 37.Kf3 Bb2 38.fg5 (38.Kg3 gf4 39.Kf4 Be5 40.Ke3 Kd6–+) 38...hg5 39.Kg2 Ke5 40.Kf3 Bc1 41.Ke2 Ke4 42.Kf2 Kf4 43.Kg2 (43.Ke2 Kg3–+) 43...Be3 44.Kh2 Kf3 45.Kh1 Kg3 (45...Kg3 46.h4 gh4–+) 0–1. Dopper,Johan – Karstens,Bart, 1991.

6.Ne2 Bb4?? 7.Bg7 Be7 8.Bh8 Bf6 (8...Nc6 9.Nbc3 Kf8 (9...Bf6 10.Bf6 Nf6 11.d4) 10.Nf4 (10.d3 Qa5 11.Qd2) 10...Bf6 11.Bf6) 9.Bf6 Qf6 (9...Nf6 A) 10.Nbc3+– Nc6 11.Rc1+– (11.Rb1); B) 10.Nd4 Bg4 11.Qb3; C) 10.Nf4 Nc6 11.d4+– (11.Bb5)) 10.Nbc3 Bg4 (10...Ne7 11.Nf4 Nbc6 12.Rb1+–) 11.Nd5 (11.Qb1+–) 11...Qd6 12.Qa4 Nc6 13.Qe4 Be6 14.Nef4 f5 (14...0–0–0 15.Bc4 Nf6 16.Nf6 Bc4 17.Qc4 Qd2 18.Kf1 Qb2+–) 15.Qe6 (15.Ne6?! fe4 16.Bc4 Ne5 17.Ndc7 Kf7+=) 15...Qe6 16.Ne6 Kd7 17.Rb1 Ke6 18.Nc7 Kd6 19.Na8 Nf6 20.Rb7 Ne4 21.Rh7 Nb4 22.Ra7 Nc5 23.Bb5 Ncd3 24.Bd3 Nd3 25.Ke2 Nb4 26.Rc1 (26.Rb1 Ke5 27.Rb4 f4 28.Ra5 Kd6 29.Rb6 Kd7 30.Ra7 Kc8 31.ef4 Kd8 32.Rb8) 26...Nc6 27.Ra6 f4 (27...Kd7 28.Rcc6 f4 29.Rc7 Ke8 30.Rh6 f3 31.Kf3 Kd8 32.Rh8) 28.Rcc6 Kd5 (28...Kd7 29.Rc7 Kd8 30.ef4 Ke8 31.Rb6 Kd8 32.Rb8) 29.Nc7 Ke4 (29...Ke5 30.Ra5 Ke4 31.d3) 30.Ra5 fe3 31.Rc4 1–0. pierre – Mstrofpupptz, internet, 2008.

6.Ne2 Nc6 7.a3 Nf6 8.Nd4 Nd4 9.Bd4 Bd6 (9...Be7 10.Bb5 Bd7 11.Bd7 Qd7 12.d3=) 10.Bb5 Bd7 11.Bd7 Qd7 12.Bf6 gf6 13.Nc3 Be5 14.Rc1 Bc3 15.Rc3 Rc8 (15...Rg8 16.0–0=) 16.0–0 Rg8 17.f3 f5 (17...Rc6!?+=) 18.Rc8+/– Qc8 19.fe4 (19.Qa4 Kf8 20.Qa7 ef3+–) 19...de4 (19...fe4 20.Qa4 Ke7 21.Qa7+/–) 20.Qh5+– 1–0. GuestYYLH – herculanum, freechess.org, 2017.

6.Ne2 f5 7.Nf4 Nf6 8.Bf6 gf6 (8...Qf6 9.Nc3 A) 9...Bb4? 10.Nfd5 (10.Ncd5?! Qd6+/–) 10...Bc3 11.Nf6 (11.Nc3?! 0–0=; 11.dc3?! Qf7+=) 11...Bf6 12.Rc1+–; B) 9...d4+/–) 9.Qh5+– Ke7 10.Nc3 Be6 11.Ncd5! Kd6?? (11...Bd5 12.Qf5 Decoy) 12.Ne6+– Ke6 13.Nf4 Kd6 (13...Ke7 14.Bc4 Qe8 15.Nd5 Kd8 16.Qe8 Ke8 17.Nc7 Kd7 18.Na8+–) 14.Qf5 Nc6 (14...Qe7 15.Qd5 Kc7 16.Rc1 Nc6+–) 15.Qd5 Ke7 16.Qe6 1–0. michaelbuss – stampyshortlegs, ChessWorld.net, 2015.

6.f3 ef3 7.Nf3+= Nf6 (7...Bb4?? 8.Bg7 Qe7 9.Qe2+–) 8.Be2 (8.a3!?=) 8...Bb4+= 9.Qa4 Nc6 10.Bb5 Be7 11.Bc6 bc6 12.Qc6 Bd7 13.Qc1 0–0 14.Nc3 Bb4 15.Kf1 (15.Qc2 Rc8=) 15...Bc3 (15...Ne4 16.a3 Bc3 17.Bc3–/+) 16.Qc3+= Bb5 17.Kg1 d4 (better is 17...Re8!?+=) 18.Nd4 (better is 18.Qd4 Qd4 19.Bd4+/– (19.ed4?! Rfc8=)) 18...Ne4 19.Qb4 a6?? (better is 19...Qh4!? 20.h3 Qf2 21.Kh2 Nd2 22.Qb5 Rab8+=) 20.Nf5?? (better is 20.Nb5 Qd2 21.Qd2 (21.Qe4?! Qb2 22.Rb1 Qa2+–) 21...Nd2 22.Nd6+–) 20...Nd2?? (better is 20...Bd3+/–) 21.Bg7 (21.Qg4 Nf3 22.gf3 Qg5 23.Qg5 Rfd8 24.Qg7) 21...Re8?? (21...Bd3 22.Bf8 Bf5+–) 22.Qg4 Re4 23.Nh6 1–0. GuestFWLS – GuestSNQY, freechess.org, 2017.

6.f3 Nf6!?+=.

6.a3 a5

7.Qa4 A) 7...Nd7 8.d3 (8.Ne2 Ngf6 9.Nd4 Be7 10.Nf5 0–0 11.Ne7= ; 8.Nc3 Ngf6 9.Rc1 Be7 10.Qb5 ab4 11.ab4= ; 8.Be5 Ne7 9.Bc3 Nc6 10.b5 Ne7 11.Qc2+=; 8.d4 Bd6 9.Nc3 Ngf6 10.Nb5 Be7 11.Rc1+=) 8...f5 9.de4 de4 10.Ne2 Ngf6 11.Nd2+=; B) 7...Bd7 8.b5 (8.Qb3 Nf6 9.ba5 Nc6 10.a6 ba6 11.Bf6+= ) 8...Na6 9.Qd4 Nc5 10.Qd5 Nf6 11.Qg5=.

7.ba5 A) 7...Nc6 8.a6 (8.d3 Qa5 9.Bc3 Qc7 10.de4 de4 11.Nd2= ; 8.Nc3 Qa5 9.Bb5 Nf6 10.Nge2 Be7 11.0–0+= ; 8.Bc3 Nf6 9.Bb5 Bd7 10.d3 Be7 11.de4=) 8...ba6 9.d3 Qb6 10.Bc3 Bf5 11.de4+=; B) 7...Qa5 8.Ne2 (8.Qb3 Ne7 9.Nc3 Na6 10.Bb5 Kd8 11.Rc1= ; 8.Bc3 Qb6 9.d3 Nf6 10.Ne2 Be7 11.de4= ; 8.f3 Nd7 9.Nc3 Ngf6 10.Bb5 Bd6 11.Qc2+=; 8.Nc3 Nf6 9.f3 Nc6 10.Qc2 Qc5 11.Rc1=) 8...Nd7 9.Bc3 Qb6 10.Bd4 Qc6 11.Nec3=; C) 7...Ra5 8.d3 (8.Bc3 Ra8 9.d3 Nd7 10.de4 de4 11.Nd2= ) 8...Nd7 9.de4 de4 10.Nd2 Ngf6 11.Qb1=; D) 7...Nd7 8.d3 (8.Bc3 Ngf6 9.d3 Be7 10.de4 de4 11.Ra2= ; 8.Ne2 Ngf6 9.Bc3 Bd6 10.Nd4 0–0 11.Be2= ; 8.Nc3 Ra5 9.Rc1 Nc5 10.Nb5 Ne6 11.Qb3=; 8.Qb3 Nc5 9.Qc2 Nf6 10.Bc3 Bd7 11.d4=) 8...Ra5 9.de4 de4 10.Nd2 Ngf6 11.Qb1=; E) 7...Nf6 8.d3 Qa5 9.Bc3 Qb6 10.de4 de4 11.Nd2=.

7.Qb3 A) 7...ab4 8.ab4 (8.Bb5 Nc6 9.ab4 Ra1 10.Ba1 Qd6 11.Bd4+= ) 8...Ra1 9.Ba1 Ne7 10.Ne2 Nbc6 11.Nf4=; B) 7...Nf6 8.ba5 (8.Bb5 Bd7 9.ba5 Be7 10.Nc3 Ra5 11.Nge2+= ; 8.d3 ab4 9.de4 ba3 10.ed5 Qa5 11.Ke2+= ; 8.Be2 Be7 9.d3 ab4 10.ab4 Ra1 11.Ba1+=; 8.Bc3 ab4 9.ab4 Ra1 10.Ba1 Be7 11.Ne2+=) 8...Nc6 9.Bb5 Ra5 10.Bc3 Ra8 11.Ne2+=.

7.b5 A) 7...Nf6 8.d3 Nbd7 9.Nc3 Be7 10.Qc2 ed3 11.Bd3+=; B) 7...Be6 8.Ne2 (8.d3 Nd7 9.Ne2 Bg4 10.Qd2 Ngf6 11.de4= ; 8.Nc3 Nd7 9.Nge2 Bg4 10.Qc2 Rc8 11.h3=) 8...Nf6 9.d3 Bd6 10.de4 de4 11.Nd2=; C) 7...Bd7 8.Nc3 (8.Qc2 Nf6 9.Nc3 Bf5 10.Nge2 Nbd7 11.Nd4= ) 8...Nf6 9.d3 Bg4 10.Qc2 Qe7 11.h3+=; D) 7...Nd7 8.d3 (8.Nc3 Ngf6 9.d3 Be7 10.de4 de4 11.Qc2= ; 8.Nh3 Nb6 9.Nf4 Nf6 10.Nh5 Nh5 11.Qh5= ; 8.Ne2 Ngf6 9.d3 Bc5 10.Ng3 0–0 11.Be2=; 8.Qc2 Ngf6 9.Nc3 Nc5 10.d3 Bf5 11.de4+=) 8...Ngf6 9.de4 de4 10.Nc3 Be7 11.Qc2=.

7.Qc2 ab4 8.ab4 Ra1 9.Ba1 Nc6 10.Bc3 Nf6 11.b5 +=.

7.Ne2 Nf6 (7...ab4 8.ab4 Ra1 9.Ba1 Nf6 10.Nf4 Bb4 11.Bf6=) 8.Bf6 (8.ba5 Be7 9.Nd4 Qa5 10.Bb5 Bd7 11.Bd7=; 8.b5 Be7 9.Nd4 Nbd7 10.Be2 Nc5 11.0–0=; 8.Qb3 Be7 9.Nf4 0–0 10.Nc3 d4 11.ed4+=; 8.Qa4 Bd7 9.b5 Bd6 10.Nec3 Bf5 11.Be2+=) 8...Qf6 9.Nbc3 Qe5 10.b5 Bd6 11.d4 =.

6.a3 Nd7

7.Qb3 A) 7...Ndf6 8.Nc3 (8.Bd4 a6 9.Nc3 Be6 10.Na4 b5 11.Nc5= ; 8.Be5 Be6 9.d4 Nd7 10.Bb5 a6 11.Bd7=; 8.d3 Be6 9.de4 de4 10.Bb5 Ke7 11.Qc2=; 8.Bb5 Bd7 9.Be2 a6 10.Bd4 Bd6 11.Nc3=) 8...a5 9.ba5 Ne7 10.d3 Nc6 11.de4+/–; B) 7...Nb6 8.Bd4 (8.d3 Be6 9.de4 de4 10.Qc2 f5 11.Nc3=; 8.Be5 Be6 9.Bb5 Nd7 10.d4 a6 11.Bd7=; 8.Nc3 Nf6 9.Nb5 a6 10.Bf6 gf6 11.Nd4=; 8.Bb5 Bd7 9.Bd7 Qd7 10.Bd4 Qg4 11.g3=) 8...Nf6 9.Nc3 Be6 10.d3 Nbd7 11.Rd1+=; C) 7...Ngf6 8.d3 (8.Nc3 Nb6 9.Nb5 a6 10.Bf6 gf6 11.Nd4= ; 8.Ne2 Bd6 9.Nbc3 Nb6 10.d3 0–0 11.Nb5= ; 8.Nh3 Bd6 9.Nc3 Nb6 10.Bb5 Kf8 11.Ng1+=; 8.f3 Bd6 9.Nc3 Nb6 10.Qc2 Be5 11.d3+=) 8...Bd6 9.Nc3 Nb6 10.Nb5 0–0 11.de4=.

7.Qc2 A) 7...Ndf6 8.d3 (8.Nc3 Bd7 9.d3 a5 10.b5 Rc8 11.Qa4= ; 8.Bd4 a5 9.ba5 Ra5 10.Qb3 Qd6 11.Nc3=; 8.Be5 Bd7 9.Nc3 Rc8 10.Qb3 a6 11.Nge2=; 8.Ne2 Bd7 9.d3 a5 10.ba5 Qa5 11.Nd2=) 8...a5 9.de4 ab4 10.e5 Ne4 11.a4=; B) 7...Ngf6 8.Nc3 (8.d3 a5 9.b5 Nc5 10.Nd2 Bf5 11.de4= ) 8...Be7 9.d3 a5 10.de4 de4 11.b5=; C) 7...Nb6 8.d3 (8.Nc3 Bd7 9.d3 f5 10.de4 de4 11.Rd1= ; 8.f3 Qh4 9.g3 Qe7 10.Bd4 Nf6 11.Nc3+=; 8.Bd4 Bd7 9.Nc3 Rc8 10.d3 Nf6 11.Rc1=; 8.Be5 Bd7 9.d3 Rc8 10.Nc3 Nf6 11.Rc1=) 8...Bf5 9.de4 de4 10.Nc3 Rc8 11.Bb5+=; D) 7...f5 8.Nc3 (8.Ne2 Nb6 9.Nd4 Bd7 10.Nc3 Rc8 11.Be2= ) 8...Ne7 9.Rc1 a5 10.Be2 ab4 11.Bh5+=; E) 7...a5 8.Nc3 Ne7 9.b5 Nc5 10.d4 ed3 11.Bd3=.

7.Bc3 A) 7...Qh4 8.Nh3 (8.Ne2 Ngf6 9.d3 Ng4 10.g3 Qe7 11.Bg2+= ; 8.d3 Ngf6 9.de4 de4 10.Nd2 a5 11.ba5+=; 8.Bd4 Ngf6 9.Nc3 Bd6 10.Nb5 Bb8 11.Rc1=; 8.Ra2 Ngf6 9.d3 Be7 10.de4 de4 11.Nd2=) 8...Ndf6 9.Nf4 Bd7 10.d3 Bd6 11.Nd5+=; B) 7...Ndf6 8.Ne2 (8.Be2 Be6 9.d3 a6 10.Nd2 Rc8 11.Rc1= ; 8.Be5 a5 9.ba5 Ra5 10.Qb3 Be7 11.Bd4=; 8.d3 Bd7 9.de4 de4 10.Ra2 Qc7 11.Rd2=; 8.Bd4 a5 9.ba5 Ra5 10.Qb3 Qd6 11.Nc3=) 8...Bd7 9.d3 Rc8 10.Ra2 Be7 11.Rd2=; C) 7...Nb6 8.Ne2 (8.Ra2 Be6 9.Bd4 Nf6 10.Nc3 a5 11.ba5= ; 8.Bb5 Bd7 9.Bd7 Nd7 10.Ne2 Qg5 11.0–0= ; 8.Bd4 Nf6 9.Nc3 Be7 10.d3 0–0 11.de4=; 8.d3 Nf6 9.de4 Ne4 10.Bb5 Bd7 11.Bd7=) 8...Bd7 9.d3 Ba4 10.Qd2 Nf6 11.Bf6+=; D) 7...Ngf6 8.Ra2 (8.d3 Qc7 9.de4 de4 10.Ra2 Be7 11.Rc2= ) 8...Be7 9.d3 0–0 10.Nd2 Bd6 11.de4=.

7.Nc3 Ngf6 8.d3 (8.Rc1 Be7 9.Qb3 Nb6 10.Nge2 0–0 11.d3=; 8.Qb3 Nb6 9.Nb5 a6 10.Bf6 gf6 11.Nd4=; 8.Qc2 Be7 9.d3 a5 10.de4 de4 11.Ne4=) 8...a5 9.b5 Be7 10.de4 de4 11.Qc2 =.

7.d3 A) 7...a5 8.Qa4 (8.de4 de4 9.Qa4 Ngf6 10.Nd2 Bd6 11.Nc4+=; 8.b5 Ngf6 9.de4 de4 10.Nc3 Be7 11.Qc2=; 8.Nd2 Ngf6 9.Qa4 b5 10.Qb3 ab4 11.ab4=; 8.ba5 Ra5 9.de4 de4 10.Nd2 Ngf6 11.Qb1+=) 8...f5 9.de4 de4 10.Ne2 Ngf6 11.Nd2+=; B) 7...a6 8.Nd2 (8.Qc2 Ndf6 9.de4 de4 10.Nc3 Bf5 11.Rd1+= ; 8.Nc3 Ngf6 9.Rc1 b5 10.de4 de4 11.Nd5+=; 8.de4 de4 9.Nd2 Ndf6 10.Ne2 b5 11.Nd4+=) 8...Ndf6 9.Rc1 b5 10.Ne2 Bf5 11.Ng3+=; C) 7...Ngf6 8.Nc3 (8.Qc2 a5 9.b5 Nc5 10.Nd2 Bf5 11.de4= ; 8.de4 de4 9.Nd2 Be7 10.Qb1 a5 11.Ne4=; 8.Nd2 Be7 9.de4 de4 10.Qb1 a5 11.Ne4=; 8.Qb3 Bd6 9.Nc3 Nb6 10.Nb5 0–0 11.de4=) 8...a5 9.b5 Be7 10.de4 de4 11.Qc2=.

7.Bd4 A) 7...a5 8.Nc3 (8.ba5 Ngf6 9.Bb5 Bd6 10.Nc3 0–0 11.a6+= ; 8.Qb3 Ngf6 9.ba5 Nc5 10.Bb5 Bd7 11.Bd7+= ; 8.Qa4 Ngf6 9.Nc3 Bd6 10.Nb5 Bb8 11.d3=) 8...Ndf6 9.ba5 Ra5 10.Qb3 Qe7 11.Nb5+/–; B) 7...Ngf6 8.Nc3 (8.d3 a5 9.Qa4 Bd6 10.Nd2 0–0 11.de4= ; 8.Qb3 a5 9.ba5 Nc5 10.Bb5 Bd7 11.Bd7+= ; 8.Bb5 a6 9.Bd7 Bd7 10.Nc3 a5 11.Qb3=; 8.Qa4 Bd6 9.Nc3 0–0 10.d3 Ne5 11.de4+=) 8...a5 9.Nb5 Be7 10.Rc1 0–0 11.Nc7=.

7.Ne2 A) 7...a5 8.ba5 (8.b5 Ngf6 9.d3 Be7 10.Nd4 Nc5 11.de4=; 8.Qa4 Ngf6 9.Nd4 Be7 10.Be2 0–0 11.Nf5=; 8.Nec3 Ngf6 9.Qb3 Nb6 10.Nb5 Be6 11.ba5=; 8.Qb3 ab4 9.ab4 Ra1 10.Ba1 Ngf6 11.Nf4=) 8...Ngf6 9.Bc3 Bd6 10.Nd4 Be5 11.Bb5=; B) 7...Ngf6 8.d3 (8.Nd4 a5 9.ba5 Qa5 10.Nc3 Nc5 11.Nb3= ; 8.Ng3 a5 9.ba5 Qa5 10.Bc3 Qb6 11.d3=; 8.Nbc3 a5 9.b5 Bd6 10.Nd4 0–0 11.d3=; 8.Nf4 Bd6 9.d3 Bf4 10.ef4 0–0 11.de4=) 8...a5 9.b5 Be7 10.Nd4 Nc5 11.de4=.

7.Nh3 A) 7...a5 8.Nf4 (8.Qb3 ab4 9.ab4 Ra1 10.Ba1 Qc7 11.Bc3= ; 8.ba5 Ngf6 9.d3 Ra5 10.Bc3 Rc5 11.d4= ; 8.Bb5 Ngf6 9.Nf4 Bd6 10.Nh5 0–0 11.Bd7=; 8.Qa4 Ngf6 9.Bf6 Qf6 10.Nc3 Kd8 11.ba5+=) 8...Ngf6 9.Qb3 ab4 10.Nd5 ba3 11.Bb5=; B) 7...Ngf6 8.d3 (8.Qb3 Bd6 9.Nc3 Nb6 10.Bb5 Kf8 11.Ng1+= ; 8.Nc3 a5 9.Nf4 ab4 10.ab4 Ra1 11.Qa1+= ; 8.Be2 Bd6 9.d3 Ne5 10.Be5 Be5 11.d4+=; 8.Bf6 Nf6 9.Bb5 Bd7 10.Bd7 Qd7 11.Nc3+=) 8...a5 9.de4 de4 10.Bc4 Be7 11.Ng5=.

6.a3 Be6

7.Qa4 Nd7 (7...Bd7 8.Qb3 Nf6 9.Ne2 Nc6 10.Nf4 Bf5 11.Ra2= ) 8.Ne2 (8.d3 a5 9.Qb5 ab4 10.ab4 Ra1 11.Ba1= ; 8.Qb5 Qb8 9.d3 a6 10.Qa4 Ngf6 11.Ne2=; 8.Nc3 Ngf6 9.Nb5 a6 10.Nd4 Bd6 11.d3+=) 8...Ngf6 9.Nd4 a5 10.Ne6 fe6 11.Bb5=.

7.Bb5 Nc6 8.Ne2 a5 9.Nf4 Nf6 10.ba5 Ra5 11.a4 =.

7.Bb5 Bd7 8.Bd7 (8.Nc3 Bb5 9.Nb5 a6 10.Nd4 Qg5 11.g3= ; 8.Bf1 Nf6 9.Bf6 Qf6 10.Nc3 Be6 11.Nge2= ; 8.Be2 Qg5 9.g3 Nf6 10.d3 Nc6 11.de4=) 8...Nd7 9.Ne2 Ngf6 10.d3 a5 11.b5 =.

7.Bb5 Nd7 8.Ne2 a6 9.Bd7 Qd7 10.0–0 Rc8 11.d3 =.

7.Bb5 Nd7+= 8.Ne2 f5 9.Nd4+= Qe7 10.Nc3 Ngf6 11.0–0 a6 12.Be2 g6 (12...g6 13.d3 Bg7+=). Grau Ribas,Jose Maria – Merkl,M, corr SOK–91–70, 1991.

7.Nc3 A) 7...Nf6 8.Rc1 (8.Nge2 a5 9.b5 Bd6 10.d3 Qe7 11.de4=; 8.d3 a5 9.ba5 Qa5 10.Nge2 Bd6 11.de4=; 8.Bb5 Nbd7 9.Nge2 a6 10.Bd7 Qd7 11.Na4=) 8...Nc6 9.d3 Be7 10.de4 de4 11.Qc2=; B) 7...Nc6 8.d3 (8.Nge2 Bg4 9.Qa4 Nf6 10.Rc1 a5 11.b5= ; 8.b5 Na5 9.d3 Nf6 10.Qa4 ed3 11.Bd3+=; 8.Qa4 Nf6 9.d3 a6 10.de4 de4 11.Qc2=; 8.Rc1 Nf6 9.d3 Rc8 10.Nge2 ed3 11.Nf4=) 8...Nf6 9.de4 de4 10.Qc2 Bf5 11.Rd1+=; C) 7...a5 8.Qa4 (8.ba5 Nf6 9.Nge2 Ra5 10.Nf4 Bd7 11.d3= ) 8...Nd7 9.Nb5 Ke7 10.Nd4 Ngf6 11.d3=.

7.d3 A) 7...Nd7 8.de4 (8.Nd2 Ngf6 9.de4 de4 10.Qb1 Bf5 11.Ngf3+= ; 8.Ne2 Ngf6 9.Nf4 Bg4 10.Qb3 Nb6 11.Bf6+=) 8...de4 9.Nc3 Ngf6 10.Qd4 Qb6 11.Rd1+=; B) 7...a5 8.de4 (8.Nd2 Nf6 9.Qa4 b5 10.Qd1 ab4 11.de4+= ; 8.ba5 Qa5 9.Bc3 Qc7 10.de4 de4 11.Ne2= ; 8.b5 Nd7 9.Ne2 Bg4 10.Qd2 Nc5 11.Nd4=) 8...ab4 9.ed5 Qd5 10.Qd5 Bd5 11.a4=.

7.Ne2 A) 7...Nc6 8.Nf4 (8.b5 Nce7 9.Nd4 Bd7 10.d3 Nf5 11.de4= ; 8.Nd4 Bd7 9.d3 Nf6 10.Nc6 Bc6 11.Nc3=; 8.d3 Nf6 9.de4 Ne4 10.Nd4 Qh4 11.g3=) 8...Bf5 9.d3 Nf6 10.b5 Ne7 11.Nd2+=; B) 7...Nd7 8.Nf4 (8.Nd4 Ngf6 9.d3 Bg4 10.Qb3 a5 11.de4= ; 8.d3 Ngf6 9.de4 de4 10.Nd4 Bg4 11.f3=; 8.Nbc3 Ngf6 9.Nd4 a5 10.ba5 Bc5 11.Ne6=) 8...Ngf6 9.d3 Bg4 10.Qb3 Nb6 11.Bf6+=; C) 7...a5 8.ba5 (8.Nd4 Bd7 9.b5 Nf6 10.d3 Bg4 11.Be2+=; 8.Nf4 Nf6 9.Ne6 fe6 10.ba5 Bd6 11.Qb3=; 8.Qb3 ab4 9.Nd4 Nc6 10.Ne6 fe6 11.ab4=) 8...Ra5 9.Nf4 Nf6 10.Qb3 Qd7 11.Bf6+=; D) 7...Nf6 8.d3 (8.Nf4 Bd6 9.Ne6 fe6 10.d3 0–0 11.Nd2= ; 8.Nd4 Bd6 9.Nb5 Be7 10.d3 0–0 11.de4=; 8.Nbc3 a5 9.b5 Bd6 10.d3 Qe7 11.de4=) 8...Bd6 9.de4 de4 10.Nd4 Bg4 11.f3=.

6.a3 Bf5

7.Qa4 A) 7...Nc6 8.d3 (8.b5 Na5 9.Bd4 Nf6 10.Nc3 Be7 11.Rd1=; 8.Ne2 a6 9.Nbc3 Nf6 10.Rc1 Bd6 11.Ng3=; 8.Nc3 Nf6 9.Rd1 a6 10.d3 b5 11.Qc2=; 8.d4 a6 9.Nc3 Nf6 10.Nge2 Bd6 11.Ng3+=) 8...ed3 9.Nf3 Nf6 10.Qd1 Bd6 11.Bd3=; B) 7...Qd7 8.Nc3 (8.Qd7 Nd7 9.Ne2 Ngf6 10.Nd4 Bg6 11.Nc3= ; 8.Bb5 Nc6 9.Ne2 Nge7 10.Nd4 a6 11.Nf5= ) 8...Qa4 9.Na4 Nd7 10.Rc1 Ngf6 11.Bb5=; C) 7...Bd7 8.Qb3 (8.b5 Na6 9.Qb3 Nc5 10.Qd5 Nf6 11.Qg5= ) 8...Nf6 9.Ne2 Nc6 10.Nf4 Bf5 11.Ra2=.

7.Bb5 A) 7...Bd7 8.Nc3 (8.Bd7 Nd7 9.Ne2 Ngf6 10.d3 a5 11.b5= ) 8...Bb5 9.Nb5 a6 10.Nd4 Qg5 11.g3=; B) 7...Nc6 8.Ne2 a5 9.Qb3 ab4 10.ab4 Ra1 11.Ba1=; C) 7...Nd7 8.Ne2 (8.Nc3 a6 9.Be2 Ngf6 10.d3 a5 11.b5+=; 8.d3 Qg5 9.g3 a6 10.Bd7 Bd7 11.Nd2+=) 8...a6 9.Ng3 Bg6 10.Be2 Ngf6 11.d3=.

7.Nc3 A) 7...Nc6 8.d3 (8.Nge2 Nf6 9.Rc1 Bg4 10.d3 a5 11.de4=; 8.Rc1 Nf6 9.Nge2 Bg4 10.Qa4 a5 11.b5+=) 8...Nf6 9.de4 de4 10.Nge2 a5 11.b5+=; B) 7...Ne7 8.Rc1 (8.Qa4 Nbc6 9.Rd1 d4 10.ed4 Qd4 11.f3+= ; 8.Nge2 a5 9.ba5 Nbc6 10.Ng3 Ra5 11.Nf5+= ; 8.d3 Nd7 9.de4 de4 10.g4 Bg6 11.Bg2+=; 8.f3 a5 9.Qa4 Nd7 10.Rc1 f6 11.g4=) 8...a5 9.Qa4 Qd7 10.Bb5 Nec6 11.Nge2+=; C) 7...Nf6 8.d3 (8.Rc1 Nc6 9.Nge2 Rc8 10.d3 ed3 11.Ng3= ; 8.Bb5 Nc6 9.Nge2 a6 10.Nd4 Bd7 11.Nc6= ; 8.Nge2 Nc6 9.d3 ed3 10.Ng3 Bg6 11.Bd3=; 8.Be2 Nc6 9.d3 Rc8 10.de4 de4 11.Qa4=) 8...Nc6 9.de4 de4 10.Nge2 a5 11.b5+=; D) 7...a5 8.Qa4 (8.ba5 Nc6 9.a6 ba6 10.d3 Qa5 11.de4= ; 8.Bb5 Nc6 9.ba5 Ra5 10.Nge2 Nf6 11.d3=) 8...Nc6 9.b5 Nb8 10.Qd4 Nf6 11.d3+=.

7.d3 A) 7...a5 8.de4 (8.b5 Nd7 9.Ne2 Bg4 10.Qd2 Rc8 11.de4= ; 8.ba5 Qa5 9.Bc3 Qb6 10.Ne2 Nf6 11.de4=) 8...de4 9.Qd8 Kd8 10.ba5 Ra5 11.Ne2+=; B) 7...Qg5 8.Ne2 (8.Qa4 Nc6 9.Nd2 Qg6 10.de4 de4 11.Rc1+= ; 8.de4 de4 9.Qa4 Bd7 10.Qc2 Nf6 11.Ne2+=; 8.Nc3 Nf6 9.de4 de4 10.Nb5 Na6 11.Nd6+/–; 8.Nd2 Nf6 9.Rc1 Nc6 10.de4 de4 11.b5+=) 8...Nc6 9.de4 de4 10.Nd2 Nf6 11.Ng3+/–; C) 7...Nc6 8.Nd2 (8.Ne2 Nf6 9.de4 Be4 10.Nbc3 Bd6 11.Nd4= ; 8.Nc3 Nf6 9.de4 de4 10.Nge2 a5 11.b5+=; 8.de4 de4 9.Nd2 Nf6 10.b5 Nb8 11.Ne2+=; 8.b5 Nce7 9.de4 de4 10.Nd2 Qa5 11.Bc4=) 8...ed3 9.Nb3 Qh4 10.b5 Nd8 11.Nf3+=.

7.Ne2 A) 7...Nc6 8.Ng3 (8.Nd4 Nd4 9.Bd4 a6 10.Nc3 Ne7 11.b5=) 8...Bg6 9.d3 Nf6 10.b5 Ne7 11.Bf6=; B) 7...a5 8.Nd4 (8.b5 Nf6 9.Bf6 Qf6 10.Nbc3 Qe5 11.Nd4= ; 8.Ng3 Bd7 9.b5 Nf6 10.Nh5 Nh5 11.Qh5=; 8.ba5 Ra5 9.Ng3 Nh6 10.Qb3 Qd7 11.Nh5+=) 8...Bd7 9.b5 Nf6 10.d3 Bg4 11.Be2+=; C) 7...Ne7 8.d3 (8.Nbc3 a5 9.b5 Nd7 10.Nd4 Bg6 11.Be2+=) 8...a5 9.de4 de4 10.Qd8 Kd8 11.ba5+=; D) 7...Nh6 8.Qb3 (8.Nd4 Nc6 9.d3 Nd4 10.Bd4 a6 11.Nc3+=; 8.Nbc3 Nc6 9.Ng3 Bg4 10.Qa4 Nf5 11.Nf5+=; 8.Ng3 Nc6 9.d3 Bg4 10.Be2 Be2 11.Qe2+=; 8.d3 Nc6 9.Ng3 Bg4 10.Be2 Be2 11.Qe2+=) 8...Nc6 9.Nbc3 d4 10.ed4 Bd6 11.d5+/–; E) 7...Nf6 8.Bf6 (8.Nd4 Bg4 9.Bb5 Bd7 10.0–0 Bd6 11.Bd7= ; 8.Ng3 Be6 9.d3 a5 10.de4 Ne4 11.b5=; 8.d3 Nc6 9.de4 Be4 10.Nbc3 Bd6 11.Nd4=; 8.Nbc3 Nc6 9.Ng3 Bg4 10.Qa4 Bd6 11.d3=) 8...Qf6 9.Nbc3 Qe5 10.Qb3 Be6 11.Nd4=.

6.Bb5 Bd7+=

7.Qa4 Bb5 8.Qb5+= Qd7 9.Nc3 a6 (better is 9...Nf6!?+=) 10.Qd7 Nd7 11.Nd5 Rc8 12.Ne2 (better is 12.f3 f5 13.Ne2+=) 12...Rc2? (better is 12...Ne7 13.Ne7 Be7+=) 13.Bc3+– Bd6 (13...Ne7 14.Ne7 Be7 15.Nd4 (15.Bg7?! Rg8 16.Bc3 Bf6+/–) 15...Rc3 16.dc3+–) 14.Nd4 (14.Bg7 Be5 15.Bh8 Bh8+–) 14...Rc3 15.dc3 Ne5 (15...Be5 16.c4+–) 16.Ke2 (16.Nf5 Kd7+–) 16...Nh6 (16...Nc4 17.f3+–) 17.f3 ef3 (17...Nc4 18.fe4 Ng4 19.Nf5+–) 18.gf3 Nc4 19.a4 0–0 (19...f5 20.a5+–) 20.f4 (20.e4 f5+–) 20...Re8 (20...f5 21.a5+–) 21.Rhg1 f5 (21...Kf8 22.e4 b6+–) 22.Nf6 Kf7 23.Ne8 Ke8 24.Rg7 Ng4 (24...b6 25.Rh7 Bf8 26.a5 ba5 27.Rc7+–) 25.Nf5 h5 26.Nd6 (better is 26.Rb7 Bf8+–) 26...Nd6 27.Rd1 Nf5 28.Rb7 Nfe3 (28...Nf6 29.Ra7+–) 29.Rdd7 Nf5 30.Rh7 1–0. nogumo – Juri, mySchach.de, 2005.

7.Qa4 Nc6 8.a3 –/+.

7.Qa4 Nf6 +=.

7.Nc3 Qg5 8.Bf1 Nf6 +=.

7.Bd7 Qd7 8.Ne2 Nf6 9.Bf6 gf6 10.Nbc3 Bb4 11.Nf4 Rg8? (better is 11...Bc3!? 12.dc3 Na6 13.Qd5 Qd5 14.Nd5 f5+=) 12.Ncd5+– Bd6 1–0. DEFFM – herculanum, freechess.org, 2017.

7.Bd7 Nd7 8.Ne2 Bb4 9.Bg7 f6 (9...Bd6 10.Bh8 Nc5 11.Nc1+–) 10.Bh8 Qc7 11.Nbc3 0–0–0 (11...Bc3 12.Nc3 Ne5 13.Nd5 Nd3 14.Kf1+–) 12.Nd5 Qd6 13.Qc2 Bc5 (13...Kb8 14.Nb4 Qb4+–) 14.0–0 (better is 14.Qe4 Ne7 15.Ne7 Qe7 16.Qe7 Be7 17.Bg7+–) 14...Qd5 15.Nf4 (15.Rac1 Qe6+–) 15...Qf7 (15...Qc6 16.d4 Ne7 17.Bf6 Nf6 18.dc5+–) 16.Qe4 Ne7 (16...Re8 17.Qc2+–) 17.Ne6 Rh8 18.Nc5 Nc5 19.Rfc1 f5 (19...Re8 20.Rc5 Nc6 21.Qf5 Qd7 22.Qf6 Re6+–) 20.Rc5 Kb8 (20...Nc6 21.Rc6 bc6 22.Qc6 Qc7 23.Qe6 Kd8 24.Qf6 Kd7 25.Qh8 Ke6+–) 21.Qe5 Ka8 22.Qh8 1–0. DEFFM – herculanum, freechess.org, 2017.

7.Bd7 Nd7 8.Ne2 Ndf6 9.0–0= Bb4?? (better is 9...Bd6=) 10.Qa4+– Qd7 11.Qb4 b6 ½–½. GuestCZSH – herculanum, freechess.org, 2017.

7.Bd7 Nd7 8.Nh3 Ngf6 9.0–0 (9.Qb3 a5 10.ba5 Qa5+=) 9...Bb4 10.Qb3 (10.Bf6 Qf6 11.Qb3 a5+=) 10...a5 (10...Qa5 11.Nf4–/+) 11.a3 Bd6 12.Nc3 (12.Bd4 Qc7 13.Nc3 Bh2 14.Kh1 Be5+=) 12...0–0 (12...Nc5!? 13.Qb5 Qd7–/+) 13.Nd5+= Nd5 (13...Nc5 14.Nf6 Qf6 15.Qb5+=) 14.Qd5 Qe7 (14...Nc5 15.Nf4+=) 15.Ng5 (better is 15.f3 ef3 16.Rf3=) 15...h6?? (15...Nc5 16.f3 Rad8+=) 16.Ne4+– Nb6?? (better is 16...Ra6+–) 17.Qd6 (17.Qd6 Qd6 18.Nd6+–) 1–0. DEFFM – GuestCRRG, freechess.org, 2018.

6.Ne2 Nf6

7.a3 Nc6 A) 8.b5 Nb8 (8...Na5 9.Bf6 Qf6 10.Nbc3 Be6 11.Nf4 Qe5= ) 9.Bf6 Qf6 10.Nbc3 Be6 11.d3 ed3=; B) 8.d3 Bd6 (8...Bg4 9.h3 Bh5 10.Qa4 Bd6 11.Nd4 0–0=; 8...Be7 9.de4 de4 10.Qd8 Nd8 11.Nd2 a5+=; 8...Bf5 9.de4 Be4 10.Nbc3 Bd6 11.Nd4 0–0+=; 8...Be6 9.de4 Ne4 10.Nd4 Qh4 11.g3 Qf6=) 9.Bf6 Qf6 10.Nbc3 ed3 11.Qd3 Be6= ; C) 8.Nf4 Be7 (8...d4 9.b5 de3 10.de3 Qd1 11.Kd1 Ne7+=; 8...Bg4 9.f3 ef3 10.gf3 Bd7 11.Rg1 Rg8=; 8...Bf5 9.b5 Ne7 10.Bf6 gf6 11.d3 Ng6=) 9.b5 Na5 10.Bf6 Bf6 11.Nc3 Be5=; D) 8.Ng3 Bg4 (8...h5 9.b5 Na5 10.d3 Bg4 11.Be2 ed3=; 8...Be7 9.b5 Na5 10.d3 ed3 11.Bd3 Nc4=) 9.Qa4 a6 10.d3 b5 11.Qb3 Rc8=; E) 8.Bf6 Qf6 (8...gf6 9.Nbc3 a5 10.b5 Ne5 11.Nf4 Be6+=) 9.Nbc3 Be6 10.Nf4 Qe5 11.Rc1 Be7=.

7.a3 Be6 8.Nd4 Qd7 (8...Nc6 9.d3=) 9.Bb5 Nc6 10.Qa4 Bd6?? (better is 10...Rc8=) 11.Nc6+– (11.Nc6 0–0 12.Bf6 gf6 13.Nd4+–; 11.Bc6?! bc6 12.Qc6 0–0=) 1–0. Hal1958 – Sirius, playchess.de, 2004.

7.a3 Be7 A) 8.Nbc3 0–0 (8...a5 9.b5 0–0 10.d3 Nbd7 11.de4 de4= ) 9.d3 a5 10.b5 Nbd7 11.de4 de4=; B) 8.Nd4 Nc6 (8...Nbd7 9.Be2 a5 10.ba5 Ra5 11.0–0 0–0= ; 8...a5 9.b5 Bd6 10.d3 Bg4 11.Be2 Be2=; 8...0–0 9.d3 Nbd7 10.Be2 a5 11.b5 Nc5=; 8...Bd7 9.d3 a5 10.b5 Bg4 11.Be2 Be2+=) 9.Nc6 bc6 10.d3 Bd7 11.de4 de4= ; C) 8.Ng3 a5 (8...0–0 9.d3 a5 10.b5 Bg4 11.Qc2 ed3=) 9.b5 Nbd7 10.Nf5 Nc5 11.Ne7 Qe7=; D) 8.d3 0–0 (8...Nbd7 9.de4 de4 10.Qd4 Qb6 11.Qb6 Nb6+= ) 9.Ng3 a5 10.b5 Bg4 11.Qc2 ed3=.

7.a3 Bg4 8.Qb3 Nbd7 (8...Nc6 9.Nd4=+) 9.h3 (9.Nf4 Bd6 10.Nd5 Rc8=) 9...Be6 10.Nf4 (10.Nd4 Rc8=) 10...Nb6 (10...Bd6 11.Ne6 fe6 12.d3=+) 11.Ne6 (11.Bb5 Nbd7+/–) 11...fe6+= 12.d3 ed3 13.Bd3 Be7 14.Nd2 0–0 15.0–0 Nfd7 16.Rad1 (16.Nf3 Bf6+/–) 16...Bf6+= 17.Bc1 (17.Rc1!?+=) 17...Rc8 18.Nf3 g6 (18...Qe7 19.Bb2=) 19.e4 Bg7 (19...Ne5 20.Be2=) 20.Be2 (20.ed5 ed5 21.Be4 Nf6+=) 20...Rc3= 21.Qa2 Ne5 (21...Qc8 22.Rfe1+=) 22.Nd4 Qc8 23.ed5 ed5 24.Be3 (24.Bb2 Rc7+=) 24...Nbc4 (24...Nec4 25.Nb5 Re3 26.fe3 Rf1 27.Bf1 Ne3+=) 25.Bc4 (better is 25.Nb5!? Re3 26.fe3 Ne3 27.Rf8 Qf8 28.Na7=) 25...Qc4= (worse is 25...Rc4 26.f4 Nd7 27.Nb5+=) 26.Qc4 dc4 (better is 26...Nc4!? 27.Ne6 Ne3 28.fe3 Rf1 29.Kf1 Bf6=) 27.Ne6+= Rc8? (better is 27...Nd3 28.Ng7 Kf7+/–) 28.Ng7+– Kg7 (better is 28...Nd3 29.Ne6 Ra3+–) 29.Bd4 (29.Bd4 Ra3 30.Be5 Kf7 31.f4+–) 1–0. Krueger,Bernhard – Bringmann,T, Baunatal op, 1995.

7.a3 Bg4 8.h3 Bh5 =.

7.Qb3 Na6 8.a3 Bd6 (8...Nc7 9.d3 Bd6 10.de4 de4 11.Nd2 0–0= ; 8...Be7 9.Nd4 Nc7 10.d3 0–0 11.Be2 a5=; 8...Bg4 9.Bf6 Qf6 10.Nbc3 Nc7 11.Nd4 Qe5+=) 9.Nd4 Nc7 10.d3 0–0 11.de4 de4 =.

7.Qb3 Nc6 A) 8.b5 Na5 9.Qc2 Bd7 10.Bf6 Qf6 11.Nd4 Rc8=; B) 8.Bc3 Bd6 (8...Be7 9.b5 Na5 10.Qc2 Bd7 11.Nd4 0–0+=) 9.Nd4 0–0 10.Qb2 Nd4 11.Bd4 Bf5+=; C) 8.a3 Bd6 (8...Be7 9.d3 0–0 10.Nd2 Bd6 11.Rd1 a5= ; 8...Bg4 9.Bf6 Qf6 10.Nbc3 Rd8 11.Rc1 Qe5=; 8...Be6 9.Nd4 Bd6 10.Ne6 fe6 11.d3 0–0=) 9.d3 Be6 10.Nd4 Nd4 11.Bd4 0–0=.

7.Qb3 Be7 A) 8.Nf4 Nc6 (8...a5 9.Bb5 Bd7 10.ba5 Ra5 11.a4 Na6= ; 8...0–0 9.Nc3 Be6 10.Rc1 Nc6 11.Ne6 fe6=; 8...Bf5 9.Nc3 d4 10.Ncd5 de3 11.de3 0–0+=) 9.Bf6 Bf6 10.Nc3 d4 11.Ne4 de3–/+; B) 8.a3 a5 (8...0–0 9.Nf4 Nc6 10.b5 Na5 11.Qc2 Bd6+= ; 8...Nc6 9.d3 0–0 10.Nd2 Bd6 11.Rd1 a5=; 8...Bg4 9.d3 0–0 10.Nd2 Nbd7 11.de4 de4=) 9.Nf4 0–0 10.Nc3 d4 11.ed4 ab4+=; C) 8.Nbc3 Nc6 (8...0–0 9.Nf4 d4 10.ed4 Nc6 11.Ncd5 Bd6+= ) 9.Nf4 d4 10.Ncd5 Nd5 11.Qd5 g5+=; D) 8.d3 a5 (8...0–0 9.Bf6 Bf6 10.d4 Qd6 11.Nbc3 Be6=; 8...Bd6 9.Nd2 Nc6 10.a3 Be6 11.de4 de4=; 8...Na6 9.a3 0–0 10.Nd2 Re8 11.Nd4 Bd6+=; 8...Nc6 9.a3 0–0 10.Nd2 Bd6 11.Rd1 a5=) 9.ba5 Nc6 10.Nd2 Qa5 11.Ng3 0–0+=.

7.b5 Bb4 A) 8.Bd4 Bg4 (8...Nbd7 9.Nbc3 Bc5 10.d3 0–0 11.de4 de4= ; 8...0–0 9.Nbc3 Be6 10.Qb1 Be7 11.f3 ef3= ; 8...Be6 9.Nf4 0–0 10.Nc3 Nbd7 11.Rc1 Ba3=; 8...Bd6 9.Nbc3 Nbd7 10.Rc1 0–0 11.Qb3 Nb6=) 9.Qb3 Bd6 10.Nbc3 Be6 11.Nf4 Nbd7+=; B) 8.Bf6 Qf6 9.Nbc3 Be6 10.Rb1 a5 11.ba6 Na6=; C) 8.Qb3 Bd6 (8...Be7 9.Nf4 Be6 10.Ne6 fe6 11.Nc3 0–0= ; 8...Ba5 9.Bf6 Qf6 10.Nbc3 Be6 11.Nf4 0–0=; 8...Bc5 9.Bf6 Qf6 10.Nbc3 Be6 11.Rc1 Qf5+=) 9.Bf6 Qf6 10.Nbc3 Be6 11.Nd4 Nd7+=; D) 8.Nd4 a6 (8...Nbd7 9.Be2 0–0 10.0–0 Bd6 11.Nc3 Be5= ; 8...Bd6 9.Be2 0–0 10.d3 a6 11.Nd2 ab5= ; 8...Qd6 9.Be2 a6 10.a3 Bc5 11.d3 0–0=; 8...0–0 9.Be2 Nbd7 10.0–0 Bd6 11.Nc3 Be5=) 9.Qa4 Bd6 10.Be2 Nbd7 11.Nf5 Nc5+=; E) 8.Nbc3 Bd6 (8...0–0 9.Rc1 Nbd7 10.Nf4 Qa5 11.a3 Bc3= ; 8...Nbd7 9.Nd4 Ne5 10.Rc1 0–0 11.Qb3 Qd6= ; 8...a5 9.Nd4 0–0 10.Rc1 Bd6 11.Be2 Be5=; 8...Be6 9.Nd4 0–0 10.Be2 Nbd7 11.0–0 Rc8=) 9.d3 Qe7 10.Rc1 0–0 11.Nd4 Rd8=.

7.b5 Bd6 A) 8.Nd4 0–0 (8...Be5 9.d3 0–0 10.de4 de4 11.Nd2 a6= ; 8...a6 9.Be2 0–0 10.0–0 Nbd7 11.Qc2 Nc5=; 8...Bd7 9.Nc3 Be5 10.d3 0–0 11.de4 de4=; 8...Qe7 9.Nc3 0–0 10.Rc1 Be5 11.Qa4 Be6=) 9.Be2 Be5 10.d3 a6 11.Nc3 Bd4+=; B) 8.Nbc3 Nbd7 (8...0–0 9.d3 Be5 10.Rc1 a6 11.de4 ab5= ; 8...Bg4 9.d3 0–0 10.h3 Bh5 11.de4 de4= ; 8...a6 9.d3 0–0 10.de4 de4 11.Ng3 Bb4=; 8...Qb6 9.d3 0–0 10.de4 de4 11.Qd4 Qd4=) 9.Rc1 0–0 10.d3 Nc5 11.Nd4 Bg4+=; C) 8.Bd4 Bg4 (8...0–0 9.Nbc3 Be6 10.d3 Nbd7 11.Rc1 Re8+= ; 8...Nbd7 9.Nbc3 0–0 10.Rc1 a6 11.Nf4 Bf4= ; 8...Be6 9.Nbc3 Nbd7 10.Rc1 0–0 11.d3 Re8+=; 8...b6 9.Nbc3 Nbd7 10.d3 0–0 11.Ng3 Re8=) 9.h3 Be6 10.d3 Nbd7 11.Nbc3 0–0+=; D) 8.Ng3 0–0 (8...h5 9.Ne2 h4 10.Bf6 Qf6 11.Nbc3 Be6+=; 8...Bg4 9.f3 Be6 10.Bd4 Nbd7 11.Nc3 Qc7+=; 8...Be6 9.d3 Nbd7 10.de4 Bg3 11.hg3 de4=) 9.d3 Bg4 10.Qa4 Re8 11.de4 de4+=; E) 8.d3 0–0 (8...Bg4 9.Nbc3 0–0 10.h3 Bh5 11.de4 de4= ) 9.de4 de4 10.Ba3 Ba3 11.Qd8 Rd8=.

7.b5 Bd7 8.Nf4 Qa5 (8...Be7 9.Bd4=) 9.Nc3 (9.Bf6 gf6 10.Nc3 f5 11.Ncd5 Bd6+/–) 9...Bb4 (9...d4!? 10.ed4 Bf5+=) 10.Nfd5+/– Nd5 11.Nd5 Bb5?? (better is 11...0–0+/–) 12.Bb5+– Qb5 (12...Nc6 13.Bg7 Rg8 14.Bc6 bc6 15.Nb4 Qb4+–) 13.Nc7 (13.Nc7 Kf8 14.Nb5+–) 1–0. GuestSLTM – GuestLHYX. freechess.org, 2017.

7.b5 Nbd7 A) 8.Ng3 h5 (8...Nc5 9.d4 Bg4 10.Qd2 Ncd7 11.h3 Be6=; 8...Bc5 9.d3 0–0 10.Be2 Re8 11.0–0 a6=; 8...Nb6 9.Be2 Bd7 10.0–0 h5 11.f3 h4+=; 8...Bb4 9.Be2 0–0 10.0–0 Qb6 11.d3 Rd8=) 9.Ne2 h4 10.Nf4 Bd6 11.d3 Ne5+=; B) 8.d3 Qb6 (8...Qa5 9.Nec3 Nc5 10.Be2 Bf5 11.d4 Nd3=; 8...Be7 9.Nbc3 0–0 10.Nd4 Nc5 11.Be2 Bd6=; 8...Bc5 9.Nd2 ed3 10.Nd4 Ne5 11.Qb1 Bb4=; 8...Bb4 9.Bc3 Qe7 10.Nd4 Ne5 11.Bb4 Qb4=) 9.Nd4 Ne5 10.Be2 ed3 11.Bd3 Bb4+=; C) 8.Nbc3 Nb6 (8...Ne5 9.Nf4 Nc4 10.Bc4 dc4 11.Qc2 Bf5+= ; 8...Bc5 9.Rc1 0–0 10.Nf4 d4 11.Ncd5 Nd5= ; 8...Bd6 9.Rc1 0–0 10.d3 Nc5 11.de4 de4+=; 8...Bb4 9.Nd4 Ne5 10.Rc1 0–0 11.Qb3 Qd6=) 9.d3 ed3 10.Qd3 Nc4 11.Qc2 Qa5+=; D) 8.Nec3 Bd6 (8...Nb6 9.d3 Bd6 10.Nd2 Bf5 11.de4 de4+= ; 8...Be7 9.Be2 Nc5 10.d4 ed3 11.Bd3 d4+= ; 8...Nc5 9.d4 Bg4 10.Qc2 Ncd7 11.Qb3 Qa5+=) 9.d3 Nc5 10.Be2 Bg4 11.de4 Be2+=; E) 8.Nd4 Ne5 (8...Bc5 9.d3 0–0 10.Be2 Ne5 11.de4 de4=; 8...Be7 9.Be2 Ne5 10.0–0 0–0 11.f4 Nc4=; 8...Nc5 9.Be2 Bd6 10.0–0 0–0 11.Nc3 a6=; 8...Bb4 9.Be2 0–0 10.0–0 Bd6 11.Nc3 Be5=) 9.Be2 Bd6 10.Qb3 0–0 11.f4 Ned7=.

7.b5 Be7 A) 8.Nd4 0–0 (8...a6 9.d3 0–0 10.Nc3 ab5 11.de4 Ne4= ; 8...Bd6 9.Be2 0–0 10.d3 Nbd7 11.Nd2 Ne5=; 8...Bg4 9.f3 Bd7 10.Qb3 0–0 11.Nc3 Bc8=; 8...Nbd7 9.Be2 Ne5 10.0–0 0–0 11.f4 Nc4=) 9.Be2 a6 10.ba6 Na6 11.0–0 Nc5=; B) 8.d3 0–0 (8...Nbd7 9.Nd4 Ne5 10.Nc3 Bg4 11.f3 ef3=; 8...Qa5 9.Nbc3 a6 10.Ng3 0–0 11.Qd2 ed3=; 8...Qb6 9.Nbc3 Nbd7 10.Nf4 Bb4 11.Qb3 Qc5+=) 9.Nbc3 Nbd7 10.Nd4 Nc5 11.de4 de4=; C) 8.f3 Bd6 (8...0–0 9.Nbc3 Nbd7 10.Rc1 Bd6 11.Nd4 Be5+= ; 8...Nbd7 9.Nd4 0–0 10.Be2 Bd6 11.Qc2 Nc5= ; 8...a6 9.Nbc3 0–0 10.fe4 Ne4 11.Ng3 Bf6+=; 8...ef3 9.gf3 0–0 10.Nbc3 Nbd7 11.Rc1 Ne5+=) 9.Nd4 Qc7 10.Qa4 Nbd7 11.Nf5 Bf8+=; D) 8.Nbc3 Nbd7 (8...0–0 9.d3 Nbd7 10.Nd4 Ne5 11.de4 Ne4= ; 8...Bd6 9.d3 Qe7 10.Rc1 0–0 11.Nd4 Be5= ; 8...Bg4 9.h3 Be6 10.Nd4 Qb6 11.d3 Nbd7=; 8...a6 9.d3 Qa5 10.de4 de4 11.Qd2 ab5=) 9.d3 0–0 10.Rc1 Ne5 11.de4 de4=.

7.b5 Bg4 8.h3 (8.Bf6 Qf6 9.Nbc3 Nd7 10.Qc2 Rc8 11.Nd4 Nb6+= ) 8...Be6 (8...Bh5 9.Bf6 Qf6 10.Nbc3 Nd7 11.Nd5 Qg5= ; 8...Bf5 9.Bf6 Qf6 10.Nbc3 Qe5 11.Nd4 Nd7= ; 8...Bd7 9.Bf6 Qf6 10.Nbc3 Qe5 11.d4 ed3=; 8...Bc8 9.Bf6 Qf6 10.Nbc3 Be6 11.Nf4 Qf5=) 9.Nd4 Nbd7 10.d3 Bb4 11.Nd2 Rc8 =.

7.Nd4 Qb6 A) 8.b5 Nbd7 (8...Be7 9.Be2 0–0 10.d3 a6 11.de4 de4= ; 8...Bc5 9.d3 Bg4 10.Qb3 Nbd7 11.de4 de4=; 8...Bb4 9.Qb3 Bc5 10.Nc3 Qd8 11.d3 Bg4=; 8...Bd6 9.Be2 0–0 10.0–0 a6 11.d3 Bd7=) 9.Nc3 Nc5 10.Be2 Bd6 11.Rc1 0–0=; B) 8.Qc2 Na6 (8...Bd7 9.a3 Be7 10.d3 0–0 11.Nd2 Rc8= ; 8...Nc6 9.a3 a5 10.b5 Nd4 11.Bd4 Qd6=; 8...Bg4 9.a3 Be7 10.f3 Bd7 11.fe4 de4+=) 9.Bb5 Bd7 10.Bd7 Nd7 11.a3 Bb4+=; C) 8.Qa4 Bd7 9.b5 Na6 10.Be2 Nc5 11.Qd1 Bd6+=; D) 8.Bb5 Bd7 (8...Nc6 9.a3 Bd6 10.Nc3 Bd7 11.Na4 Qd8= ) 9.Qc2 Nc6 10.a3 a5 11.ba5 Ra5+=; E) 8.a3 a5 (8...Be7 9.d3 a5 10.de4 de4 11.Qa4 Bd7= ; 8...Nc6 9.Nc6 Qc6 10.Bf6 Qf6 11.Nc3 Be6=; 8...Nbd7 9.Nc3 a5 10.Qb3 ab4 11.Nd5 Nd5=; 8...Bd7 9.d3 Be7 10.Nd2 0–0 11.de4 de4=) 9.Qc2 Bd7 10.ba5 Ra5 11.Qb3 Qb3=.

7.Nd4 Nc6 A) 8.a3 Bd6 (8...Bd7 9.d3 a5 10.de4 de4 11.b5 Bg4= ; 8...Nd4 9.Bd4 Be7 10.Be2 0–0 11.0–0 a5=; 8...a5 9.b5 Nd4 10.Bd4 Be7 11.Be2 Be6=; 8...Ne5 9.Nc3 a5 10.ba5 Ra5 11.d3 Bg4=) 9.Nc6 bc6 10.d3 0–0 11.Qc2 Bf5=; B) 8.b5 Bg4 (8...Nd4 9.Bd4 Bg4 10.Qa4 Be7 11.Nc3 0–0=; 8...Ne5 9.Be2 Bd6 10.Qb3 0–0 11.f4 Ned7=) 9.Nc6 bc6 10.Qa4 c5 11.Bf6 Qf6=; C) 8.Nc6 bc6 9.a3 a5 10.b5 Bd7 11.bc6 Bc6=; D) 8.Qa4 Bd7 9.b5 Nd4 10.Bd4 a6 11.Qb3 ab5=; E) 8.Bb5 Bd7 (8...Qb6 9.a3 Bd6 10.Nc3 Bd7 11.Na4 Qd8= ) 9.a3 Bd6 10.d3 Nd4 11.Bd7 Nd7=.

7.Nd4 Bd7 A) 8.b5 Bd6 (8...a6 9.Be2 ab5 10.Nb5 Be7 11.Qb3 0–0= ; 8...Bc5 9.Be2 0–0 10.0–0 Qc7 11.Qa4 Rc8=; 8...Be7 9.Be2 0–0 10.0–0 Bd6 11.Nc3 Be5=; 8...Bb4 9.Nc3 Bc5 10.d3 0–0 11.Qa4 Qe7=) 9.Nc3 Be5 10.d3 0–0 11.de4 de4=; B) 8.Bc3 Bd6 (8...Nc6 9.Nc6 Bc6 10.d3 Rc8 11.de4 de4=; 8...Qb6 9.a3 Bd6 10.d3 0–0 11.de4 Ne4=; 8...Be7 9.Be2 0–0 10.d3 Qc7 11.0–0 Bd6=; 8...a6 9.d3 Bd6 10.Nd2 0–0 11.Rc1 Qe7=) 9.d3 0–0 10.Nd2 Nc6 11.Nc6 Bc6+=; C) 8.a3 Bd6 (8...Nc6 9.d3 Bd6 10.de4 de4 11.Nd2 0–0= ; 8...Be7 9.d3 0–0 10.de4 de4 11.Nc3 Nc6=; 8...a5 9.b5 Bd6 10.Nc3 Be5 11.d3 0–0=; 8...a6 9.d3 Bd6 10.de4 de4 11.Nd2 0–0=) 9.Nb5 Be7 10.Be5 0–0 11.d4 Bb5=; D) 8.Qb3 Nc6 9.Nc3 Nb4 10.a3 Nd3 11.Bd3 ed3=.

7.Nd4 Nbd7 A) 8.a3 a5 (8...Be7 9.d3 0–0 10.Be2 a5 11.b5 Nc5= ; 8...Ne5 9.d3 Bg4 10.f3 ef3 11.gf3 Bd7=) 9.ba5 Qa5 10.Bb5 Bc5 11.Qe2 0–0=; B) 8.Qa4 Be7 (8...a5 9.Bc3 Be7 10.Nf5 0–0 11.Ne7 Qe7=; 8...Qb6 9.a3 a5 10.d3 Qd8 11.de4 de4+=) 9.Be2 0–0 10.0–0 a5 11.b5 Nc5=; C) 8.Qb3 Ne5 (8...Qb6 9.a3 a5 10.Bb5 ab4 11.ab4 Ra1= ; 8...a5 9.Nc3 Ne5 10.ba5 Ra5 11.Rc1 Be7=; 8...Nb6 9.Nc3 Be7 10.d3 0–0 11.de4 de4=; 8...Be7 9.Nc3 Nb6 10.d3 0–0 11.Rd1 Bg4=) 9.Nc3 a5 10.ba5 Ra5 11.Rc1 Be7=.

7.Nd4 Be7 A) 8.b5 0–0 (8...Bg4 9.f3 Bh5 10.d3 ef3 11.gf3 0–0= ; 8...Nbd7 9.Be2 0–0 10.d3 Qc7 11.Nd2 Nc5=; 8...Bd6 9.Be2 0–0 10.d3 a6 11.Nd2 ab5=) 9.Nc3 Bc5 10.Qa4 Nbd7 11.Rc1 Nb6–/+; B) 8.Be2 0–0 (8...Nc6 9.a3 Nd4 10.Bd4 a5 11.ba5 Ra5=; 8...Qb6 9.b5 0–0 10.0–0 Nc6 11.d3 a6=; 8...Nbd7 9.Qb3 0–0 10.Nc3 Ne5 11.0–0 Nc6=; 8...Bd6 9.0–0 Nc6 10.a3 a5 11.b5 Nd4=) 9.a3 Nc6 10.d3 Nd4 11.Bd4 a5=; C) 8.Nc3 Nc6 (8...0–0 9.Qa4 a5 10.b5 Nbd7 11.Rc1 Bc5+=; 8...a5 9.b5 Bc5 10.d3 0–0 11.de4 de4=; 8...Qb6 9.a3 0–0 10.Rc1 Nc6 11.Na4 Qd8+=) 9.Nc6 bc6 10.b5 Bd7 11.bc6 Bc6+=; D) 8.Bb5 Bd7 (8...Nbd7 9.Qb3 0–0 10.0–0 a6 11.Be2 a5=) 9.a3 Bb5 10.Nb5 0–0 11.d3 Nc6+=; E) 8.a3 Bd7 (8...a5 9.b5 0–0 10.Be2 Bd6 11.d3 Qe7= ; 8...0–0 9.Be2 Nc6 10.0–0 a5 11.b5 Nd4=; 8...Nc6 9.Nc6 bc6 10.d3 Bd7 11.de4 de4=; 8...Nbd7 9.Be2 a5 10.b5 Ne5 11.0–0 0–0=) 9.d3 Nc6 10.de4 de4 11.Be2 a5=.

7.Nd4 Bg4 A) 8.Bb5 Bd7 (8...Nbd7 9.f3 Bh5 10.a3 a6 11.Be2 a5= ) 9.a3 a5 10.ba5 Bb5 11.Nb5 Be7=; B) 8.f3 Bd7 (8...ef3 9.gf3 Bd7 10.a3 a5 11.ba5 Nc6= ; 8...Bc8 9.Be2 Bd6 10.0–0 0–0 11.a3 a5=) 9.a3 Nc6 10.Be2 a5 11.b5 Nd4=; C) 8.Qb3 Nc6 (8...Bd6 9.f3 Bc8 10.Bb5 Bd7 11.Bd7 Qd7= ; 8...Qe7 9.a3 Nc6 10.d3 Ne5 11.Nd2 ed3+=) 9.Nc6 bc6 10.d3 Rb8 11.a3 a5+=; D) 8.Qa4 Bd7 (8...Nbd7 9.Nc3 a6 10.f3 Bh5 11.g4 Bg6+= ) 9.b5 Na6 10.Be2 Nc5 11.Qc2 Rc8+=; E) 8.Qc2 Bd7 (8...Nbd7 9.Nc3 Bb4 10.Nd5 Nd5 11.Qe4 Be6= ; 8...Bd6 9.f3 Bc8 10.Nc3 ef3 11.gf3 a6= ; 8...Be7 9.f3 Bd7 10.fe4 Ne4 11.Nc3 Nf6+=; 8...Qb6 9.a3 Nc6 10.f3 ef3 11.gf3 Bd7+=) 9.b5 Bd6 10.Nc3 0–0 11.Qb3 Be6=.

7.Bf6 gf6 8.Nbc3 (8.a3 a5 9.b5 Be6 10.Nbc3 Nd7 11.Nf4) 8...Bb4 9.Qb3 Qa5 (9...Nc6 10.Nd5 Bd6 11.Nec3) 10.Qd5 f5 11.Nd4.

7.a3 a5

8.Qa4 Bd7 (8...Qd7 9.b5 Na6 10.Nf4 Nc5 11.Qc2 Ne6=; 8...Nbd7 9.Nd4 Be7 10.Be2 0–0 11.Nf5 Re8=) 9.b5 Bd6 10.Nf4 0–0 11.Nc3 Bf4 +=.

8.ba5 Be7 (8...Bd6 9.d3 Nc6 10.de4 de4 11.Nd2 Qa5=; 8...Nc6 9.Nd4 Ra5 10.d3 Bd6 11.de4 de4=; 8...Ra5 9.d3 Nc6 10.de4 Ne4 11.Nd4 Qf6=; 8...Bc5 9.Nf4 Be7 10.Bc3 Nc6 11.Bb5 Bd7=) 9.Nd4 Qa5 10.Bb5 Bd7 11.Bd7 Nbd7 =.

8.Qb3 Be7 (8...ab4 9.ab4 Ra1 10.Ba1 Be6 11.Nf4 Nc6=; 8...Bd6 9.Nec3 Be6 10.Nb5 ab4 11.Nd6 Qd6=; 8...Nbd7 9.Nf4 ab4 10.Nd5 ba3 11.Bb5 Nd5=) 9.Nf4 0–0 10.Be2 g5 11.Nh5 Nh5 =.

8.b5 Nbd7 (8...Be7 9.d3 0–0 10.de4 de4 11.Nd2 Nbd7=; 8...Bc5 9.d3 Nbd7 10.Nd4 0–0 11.Be2 Ne5=; 8...Bd6 9.d3 0–0 10.de4 de4 11.Nd2 Nbd7=; 8...Bg4 9.h3 Bh5 10.Bf6 Qf6 11.Nbc3 Nd7=) 9.d3 Bc5 10.Nd2 ed3 11.Nd4 Ne5 =.

8.Nf4 Bd6 (8...Be7 9.b5 0–0 10.Bd4 Be6 11.Be2 Bd6+=; 8...ab4 9.ab4 Ra1 10.Ba1 Bb4 11.Bf6 Qf6=; 8...Nbd7 9.Qb3 ab4 10.Nd5 ba3 11.Bb5 Nd5=) 9.Bf6 gf6 10.Nd5 (10.Bb5 Kf8 11.Nc3 Bf4=) 10...ab4 11.Bc4 (11.Qc2 Bf5=) 11...Be6 (worse is 11...ba3 12.Qc2=) 12.d3 (12.Qb3!? 0–0 13.Nb4 Bc4 14.Qc4+=) 12...Be5–/+ (12...ba3?! 13.de4 Rg8 14.g3+=) 13.d4 Bd5 14.Bd5 Qd5 15.de5 Qd1 16.Kd1 fe5 17.Kc2 Ke7 18.Kb3 Rd8 (18...Rg8 19.Rg1 Nc6 20.h3–+) 19.Rc1 Nc6 20.Kb2 Ke6 21.Rc4 Ra4 22.Kb3 Ra6 23.Re4 Rd1 24.Kb2? (24.Kc2 Rf1 25.Rh4 Rf2 26.Kd3 e4 27.Kc4 ba3 28.Na3 Ra4 29.Kc5–+) 24...Rf1 25.Ra2 b5 (25...Rf2?! 26.Ka1 Ra2 27.Ka2 ba3 28.Na3–+) 26.Rh4 ba3 27.Ra3 Rb1! 28.Kb1 Ra3 29.Rh6 f6 30.Rh7 Rd3 31.Rb7 (31.Kc1 Rd5–+) 31...Rd1 32.Kc2 Rf1 33.Rb5 Rf2 34.Kb3 Rg2 35.Rc5 Ne7 36.Rc2 Rg4 37.Rc4 Kf5 38.Rc2 (38.h4 Rg3 39.Rc3 Ke4 40.Rc4 Ke3–+) 38...Nd5 0–1. Bonetti,Shane – Perlitz,Heiko, TT–10 ETC, 2003.

8.Bf6 Qf6 9.Nbc3 Qe5 10.b5 Bd6 11.d4 Qg5 =.

7.a3 Bd6

8.Nbc3 a5 (8...Nc6 9.d3 0–0 10.de4 de4 11.Nd4 Bg4= ; 8...0–0 9.Rc1 a5 10.Nb5 ab4 11.Nd6 Qd6+=; 8...a6 9.Qb3 Be5 10.f4 ef3 11.gf3 Be6=; 8...Nbd7 9.Qb3 Nb6 10.d3 0–0 11.Nb5 Bb8=) 9.Qa4 Bd7 10.b5 Na6 11.Nd4 Nc5 +=.

8.d3 0–0 9.Bf6 Qf6 10.Nbc3 Qe5 11.de4 de4 =.

8.d3 a5 9.de4 de4 10.Nd2 Nbd7 11.Nc4 Bc7 =.

8.d3 Nc6 9.Bf6 Qf6 10.Nbc3 ed3 11.Qd3 Be6 =.

8.d3 Be6 9.de4 de4 10.Nd2 Nbd7 11.Nd4 Qe7 +=.

8.d3 Bf5 9.de4 de4 10.Ng3 Bg3 11.Qd8 Kd8 12.Bf6 +=.

8.Nd4 Be5 (8...a5 9.b5 0–0 10.Be2 Nbd7 11.d3 Ne5= ; 8...0–0 9.d3 a5 10.ba5 Bg4 11.Qb3 Qa5=; 8...Nc6 9.Nc6 bc6 10.d3 0–0 11.Qc2 Bf5=) 9.f4 ef3 10.gf3 0–0 11.Qe2 Re8 +=.

8.Nf4 Bf4 9.ef4 +=.

8.Bf6 Qf6 9.Nbc3 Be6 10.d3 a5 11.de4 ab4 +=.

7.Nd4 Bd6

8.a3 0–0 (8...a5 9.b5 0–0 10.Be2 Nbd7 11.d3 Ne5= ; 8...Be5 9.Bb5 Bd7 10.Be2 0–0 11.d3 a5=; 8...Nc6 9.Nc6 bc6 10.Qc2 Bd7 11.d3 ed3=) 9.d3 a5 10.ba5 Qa5 11.Qd2 Qb6 +=.

8.Qa4 Bd7 9.Bb5 0–0 10.a3 a6 11.Bd7 Nbd7 +=.

8.b5 0–0 9.Be2 Be5 10.d3 a6 11.Nc3.

8.Bb5 Bd7 9.Bd7 Qd7 10.a3 0–0 11.d3 Rc8 +=.

8.Bb5 Bd7 9.Bd7 Nbd7 10.Nf5 Ne5 11.Qa4.

8.Nc3 Be5 (8...Nc6 9.Qa4 Bd7 10.b5 Nd4 11.Qd4 Be6=; 8...0–0 9.Qb3 Be5 10.Nce2 a5 11.ba5 Ra5+=) 9.d3 0–0 10.de4 de4 11.Qa4 Bd4 +=.

8.Be2 0–0 9.b5 Nbd7 10.0–0 a6 11.Qc2 Nc5 =.

8.Be2 b6 9.0–0 0–0 10.Qb3 a5 11.ba5 ba5 =.

8.Be2 Nc6 9.b5 Nd4 10.Bd4 0–0 11.Nc3.

8.Be2 Bd7 9.a3 0–0 10.d3 Nc6 11.de4 de4 =.

7.Bf6 Qf6

8.Nbc3 Bb4 9.Nd5 Qd6 10.Nec3 Bc3 11.Nc3 f5 +=.

8.Nbc3 Nc6 9.a3 Be6 10.Nf4 Qe5 11.Rc1 Be7 =.

8.Nbc3 Qe5 9.Rc1 Nc6 10.b5 Nb4 11.Nd4 Qg5 =.

8.Nbc3 Be6 9.a3 a5 10.Nd4 Bd6 11.Bb5 Kd8 =.

8.Nbc3 Be6 9.Nf4 Bd6 (9...Nc6!?=) 10.Nfd5+= Bd5 11.Nd5 Qe5 12.Rc1 0–0 13.Bc4 Nc6 14.f4 ef3 15.Qf3 Bb4 (15...Rac8!? 16.b5 Na5=) 16.Nb4+/– Nb4 17.0–0 (17.Qb7!? Qb2 18.Ke2+/–) 17...Qe7+= 18.d4 Rab8 (18...Rad8 19.a3 Nc6 20.Rc3+=) 19.Bb3 (19.e4 Rbe8+/–) 19...Nc6 20.Rc3 (20.Rcd1 Rbe8 21.e4 Kh8+/–) 20...Rbe8 (20...Rbc8 21.Qh3 Rcd8 22.Bc2+=) 21.Bd5+/– Nd8 (21...Nb4 22.Bb7 Na2 23.Rb3+/–) 22.a4 (22.Rd1 b5+/–) 22...Qb4 (22...b6 23.e4+/–) 23.Rb3 Qa4 24.Rb7 Nb7 (better is 24...Qa3!? 25.Rb3 Qd6+/–) 25.Bf7+– Kh8 26.Be8 Rf3 27.Ba4 Rf1 28.Kf1 Kg8 29.Ke2 Kf7 30.e4 Ke6 31.Kd3 h6 (31...Na5 32.e5+–) 32.e5 Na5 (32...g6 33.Be8+–) 33.Ke4 Nb7 (33...Ke7 34.d5 Nc4 35.Bb5+–) 34.Bc6 Nd8 35.d5 Ke7 (35...Kf7 36.Bb5+–) 36.d6 Ke6 37.Bb5 a5 (37...Nb7 38.Bc4 Kd7 39.Kd5 Nd6 40.ed6+–) 38.Bc4 Kd7 39.Kd5 g5 (39...Ke8+–) 40.Bb5 (40.Bb5 Kc8 41.e6 Ne6 42.Ke6+–) 1–0. pcmvr (2775) – kode (2345), net–chess.com, 2008.

4.c4 Nc6

5.a3 Be6 6.cd5 Bd5 7.Nc3 Nf6 8.d3 ed3 9.Nd5 Qd5 10.Qd3 0–0–0 11.Qd5 Nd5 12.Nf3 f6 13.0–0–0 Nb6 14.Bb5 Rd1 15.Rd1 Nb8 16.Nd4 a6 17.Bf1 N8d7 18.Ne6 Bd6 19.Ng7 Bh2 20.g3 Bg1 21.Nf5 Re8 22.Bd4 Bf2 23.Rd2 Be1 24.Re2 Bg3 25.Ng3 Nc4 26.Rh2 Na3 27.Rh7 Kd8 28.Nh5 Re6 29.Bh3 Rc6 30.Kd1 f5 (30...Nf8 31.Rh8 Ke7 32.Nf6+–) 31.Rh8 Ke7 32.Ng3 Nf6 33.Nf5 (worse is 33.Bf5 Nb5 34.Bc5 Kf7+–) 33...Kf7 34.Bc5 Nd5 35.Bg2 Nc3 36.Kd2 Nab1 (36...Rc5 37.bc5 Na4 38.Bb7 Nc5 39.Bc8+–) 37.Kc2 Rf6 38.Rf8 Kg6 39.Ne7 Kg5 40.Rf6 Kf6 41.Bb7 a5 (41...Ke6 42.Nc6+–) 42.ba5 Na4 43.Nd5 Ke6 44.Bf8 c6 45.Bc6 Nd2 46.Kd2 Nb2 47.a6 Nc4 48.Kc3 Ne5 49.a7 Nc6 50.Nf4 Kd7 51.a8Q Na5 (51...Na7 52.Qb7 Kd8 53.Ne6 Ke8 54.Qe7) 52.Qa7 (52.e4 Nc6 53.Qb7 Kd8 54.Ne6 Ke8 55.e5 Ne5 56.Qe7) 52...Kc6 53.Qa6 Kd7 54.Qd6 Kc8 55.Nd5 Kb7 56.Qc7 Ka8 (56...Ka6 57.Qb6) 57.Nb6 1–0. pierre – pelle, ChessHere.com, 2006.

5.b5 Nb4 6.Nc3 dc4 7.Ne4 +=.

5.b5 Nce7 6.a4 Nf6 7.Na3 (7.Qc2 dc4 8.Bc4 Nf5+=) 7...Bg4 8.Be2 Be6 9.Bc3 Ng6 10.cd5 Nd5 (10...Bd5?! 11.Nc4+=) 11.Bd4 f6 (11...Nh4 12.Qc2 Ba3 13.Ra3 Ng2 14.Kf1–+) 12.Bc4 (12.Qc2 f5=) 12...Bb4 13.Ne2 0–0 14.0–0 b6 (14...Qd6!? 15.Nc3 A) worse is 15...Ba3 16.Qb3 Rfd8 17.Ne4+/– (17.Qa3?! Qa3 18.Ra3 Ndf4=); B) 15...Nc3 16.Bc3 Ba3 17.Be6 Qe6 18.Ra3 Rad8=) 15.Qb3+= Bd2?? (better is 15...Qd6+=) 16.Rfd1+– Ba5 17.Bb6! Bb6 (17...Bb6 18.Bd5 Combination; 17...ab6 18.Bd5 Combination; 17...cb6 18.Bd5 Combination; 17...Nb6 18.Be6 Double attack (18.Rd8 Pinning; 18.Rd8 Deflection; 18.Rd8 Clearance)) 18.Bd5+– (18.Rd5?! Bd5 19.Bd5 Kh8 20.Ba8 Qa8+/–) 18...Bd5 19.Rd5 (19.Qd5?! Qd5 20.Rd5 Rfd8 21.Rd8 Rd8+=) 19...Qe8 20.Re5 (20.Nc4!? Qe6 21.Rad1+–) 20...Qf7+/– 21.Qf7 Rf7 22.Re4 Rd8 23.Nc4 Rfd7 24.h3 Kf7 25.Ng3 Ne7 26.Nb6 ab6 27.Rc4 Ng6 28.Ne4 Ne5 29.Rc3 h5 30.Rac1 Nd3 31.R1c2 Nb4 32.Rb2 Nd5 33.Rc4 h4 34.Rbc2 g5 35.Nc3 c5?? (better is 35...Ne7+/–) 36.bc6+– Rc7 37.Nd5 (better is 37.Nb5 Rcc8 38.c7 Rd7+–) 37...Rd5 38.Rb2 Rc5 (38...Ke6 39.Rb6 Rd1 40.Kh2 Kd5+–) 39.Rc5 bc5 40.Rb7 (40.Rb7 Ke7 41.Rc7 Kd6 42.Rf7 Kc6 43.Rf6 Kd7 44.Kf1+–) 1–0. algernon (2510) – pallen (2150), net–chess.com, 2015.

5.cd5 Nb4 6.Nc3 Nf6 7.a3 Nbd5 8.Ne4 Be7 9.Nf6 Nf6 (worse is 9...gf6 A) 10.e4 Nb6 (10...Nf4 11.Qf3 Ne6 12.Bc4 c6 13.Rc1 Rg8+=) 11.Nf3+= (11.h3 Bd7 12.Nf3 Rg8 13.Rb1 Bc6=) 11...Rg8 12.Qc2 c6 13.Rg1 Bg4+=; B) 10.Nf3 c6 (10...Be6 11.d4 c6 12.Bd3 Qa5 13.Qd2 Qd2+=; 10...Bd6 11.Qb3 Nb6 12.Qc3 Nd7 13.d4 Nb6+/–) 11.e4 Nf4 12.Qb3 Rg8 13.Rg1 Qd6+=; C) 10.d4 Bf5 (10...Bd6 11.e4 Qe7 12.Qe2 Nf4 13.Qe3 Rg8+=) 11.Qb3 Nb6 12.Nf3 Rg8 13.Nh4 Be4+=) 10.Nf3 (10.d4 0–0 (10...Bd6 11.Bd3 0–0 12.Qc2 Bg4 13.e4 Re8+=; 10...c6 11.Nf3 Bg4 12.Be2 Be6 13.0–0 0–0=; 10...Be6 11.Bd3 0–0 12.Nf3 Re8 13.0–0 Bd5=; 10...Bf5 11.Nf3 0–0 12.Bc4 Rb8 13.Ne5 b5=) 11.Nf3 Bg4 12.Be2 Qd5 13.0–0 Bd6=; 10.Qc2 Be6 11.Nf3 a6 12.Rc1 c5 13.Ng5 b5=) 10...0–0 11.Qc2 Be6 (11...Bg4 12.Ng5 Qd7 13.Rc1 Bf5+=) 12.Ng5 Qd6?? (better is 12...Qd7= 13.Rc1 Bf5+=) 13.Bf6+– g6 14.Ne4 (14.Ne6?! Bf6 15.Nf8 Ba1 16.Nh7 Kh7+–) 14...Bf5 (14...Qd7 15.Qb2 Bd6 16.Bg7+–) 15.Nd6 Bc2 16.Be7 Rfb8 (16...cd6 17.Bf8 Kf8+–) 17.Rc1 cd6 18.Rc2 Re8 (18...d5 19.Rc5+–) 19.Rc7 1–0. marekt – hschmidl, internet, 2008.

4.c4 Be6

5.Qc2 Nf6 6.b5 c6 7.f3 (7.Bd4 a6 8.cd5 Bd5 9.Nc3 ab5 10.Nd5+=; 7.cd5 cd5 8.d3 Nbd7 9.Nc3 Rc8 10.Rc1+=; 7.a4 Be7 8.Ne2 0–0 9.Nd4 a6 10.Nc3+=; 7.Be2 Nbd7 8.bc6 bc6 9.Nc3 Nc5 10.cd5+=) 7...a6 8.cd5 Bd5 9.bc6 Bc6 10.Nc3=.

5.Qc2 Nf6 6.c5 a6 7.Ne2 Nc6= 8.a3 b5 9.cb6+/– Bd7 10.bc7+– Qe7 11.Bf6 Qf6 12.Nec3 Be6? 13.Ba6 Ra6= 14.Nd5? Qe5?? 15.b5+– Bd5?? 16.c8Q (16.c8Q Ke7 17.Nc3+–; 16.ba6?! Qc7 17.Nc3 Ne5=) 1–0. janbs – Ginger Prince, ChessWorld.net, 2004.

5.Qc2 Nf6 6.cd5 Bd5 7.a3 (7.Nc3 Bb4 8.Nd5 Qd5 9.Bf6 gf6 10.f3=) 7...Bd6 (7...a5 8.b5 (8.Bc4+= Bc4 9.Qc4 c6 10.Bf6+=) 8...Nfd7 9.Nc3 Nc5 10.Nd5+=) 8.Nc3= Bc6 (8...Be5 9.Rd1 (9.Nd5 Qd5 10.Be5 Qe5 11.Rc1=) 9...a5 10.b5+=) 9.Bc4 (better is 9.b5!? Bd7 10.Ne4+–) 9...Be5 (9...a6 10.f3=) 10.Rc1 (10.b5+=) 10...0–0 11.d3?? (better is 11.b5 Bd7 12.Nd5 Bb2 13.Qb2+=) 11...ed3–+ 12.Bd3 Bg2 13.f4 (13.Rd1 Qe8 14.Nb5 Bh1 15.Nc7 Bc7 16.Qc7–+) 13...Bd6 (better is 13...Bc3 14.Bc3 Bh1 15.Bf6 Qf6 (worse is 15...gf6 16.Bh7 Kh8 17.Qf2–+) 16.Bh7 Kh8–+) 14.Qg2+– Be7?! (14...Bb4 15.Bh7! (15.Qb7?! Qd3 16.ab4 Qe3 17.Nge2 Nbd7+–) 15...Nh7 16.ab4+–) 15.Bc4 (15.Rd1 Nbd7+–) 15...Nc6 16.Ne4 a6 (16...Nh5+–) 17.Rd1 Qc8 (17...Qd1 18.Kd1 Rfd8 19.Kc1+–) 18.Bf6 g6 19.Be7 (19.Ba1!? Bh4 20.Ng3 Re8+–) 19...Ne7 20.Nf6 Kg7 21.Qb2 Qe8 (21...Nf5 22.e4 Rd8 23.Ng4 Kg8 24.ef5 Rd1 25.Kd1 Qd7 26.Ke2 Re8 27.Kf2 Kf8+–) 22.Ne8 Kg8 (22...Kh6 23.Qg7 Kh5 24.Qh7 Kg4 25.Qh3) 23.Qg7 1–0. West,Lawrence – Wei,Victor, Livermore, 1998.

5.c5 a5 6.a3 =+.

5.c5 c6 6.Ne2 (6.d3 Nd7=) 6...Na6 7.a3 Nc7 8.Nd4 Qd7 9.Be2 Nf6 10.0–0 Bg4 (10...b6 11.Ne6 Qe6 12.cb6 ab6 13.d3+=) 11.Bg4 Qg4 12.f3 (12.d3 Qg6=) 12...ef3 (12...Qg6 13.Nc3=) 13.Nf3 (13.Rf3 Ne6 14.Ne6 fe6+=) 13...Be7= 14.Qe1 h5 (14...0–0–0 15.Ne5 Qh5 16.Qg3=) 15.h3 White gets strong initiative 15...Qe4 16.Nc3 Qc2 (16...Qg6 17.Qf2+=) 17.Nd4 Qb2? (better is 17...Qg6!?+=) 18.Ra2+– Qb3?? (better is 18...Qa2 19.Na2 0–0–0+–) 19.Nb3 h4 (19...Ne6 20.Rb2+–) 20.Nd4 g6 (20...0–0–0 21.Nf5 Bf8 22.Rf4+–) 21.e4 Rd8 22.ed5 (22.e5 Nd7+–) 22...Nfd5 23.Nd5 cd5 (23...Nd5 24.d3 0–0+–) 24.Qe5 f6 25.Rf6 (better is 25.Qc7 b6+–) 25...Rh5 26.Qe2 Kd7 (26...Rg5 27.Rf4+–) 27.Rg6 (better is 27.Qg4 Ke8 28.Qg6 Kd7 29.Qg4 Ke8 30.Qh5 Kd7 31.Qf5 Ke8+–) 27...Rh7 28.Qg4 Ke8 29.d3 Rd7 30.Re2 Kd8 White now must not overlook the idea Bf8 31.Rg8 Ne8 32.Re8! Ke8 Decoy to e8 (32...Kc7 33.Nb5 Kc6 34.Na7 Kc7 35.Rc8) 33.Qg8 1–0. Hasler,Ulrich – Kientzler,Roland, CiF, 1991.

5.c5 c6 6.Ne2 Nf6 7.Nf4 Qd7 8.Bf6 gf6 9.Ne6 fe6 10.d4 Qg7 11.Nc3 Nd7 12.Qh5 Qg6 13.Qg6 hg6 14.Ne2 0–0–0 (better is 14...e5!?=) 15.Nf4+/– Bh6 16.Ng6 Rh7 17.h4 Rg8 18.h5 Bg5 19.g4 f5 20.Be2?? (better is 20.Rg1 Kd8 21.gf5+–) 20...Rg6!–+ 21.Kd2 Rg8 22.a4 fg4 23.Rag1 Nf6 24.b5 Kd7 25.Kc3 a6 26.b6? Rh5 27.Rh5 Nh5 28.Kd2 Nf6 29.Ke1 Bh6 30.Kf1 g3 31.Rh1 g2 0–1. hal1958 – Sonea, playchess.de, 2004.

5.c5 Nc6 6.a3 Nf6 7.Bb5 a5 8.Bc6 (8.d3 Be7+=) 8...bc6 9.Ne2 Be7 10.0–0 (10.Nd4 Bd7+=) 10...ab4 11.ab4 Rb8 (11...0–0 12.Nd4=) 12.Bc3 (12.Nd4 Bd7 (12...Rb4? 13.Nc6 Rb2 14.Nd8 Bd8 15.d4+–) 13.Bc3 Ra8=) 12...0–0 (12...Bg4 13.d3=) 13.d3 (13.Nd4 Qd7=) 13...Qd7 14.de4 (14.Ng3 Rfd8=) 14...Ne4 15.Be1 (15.Qa4 Qe8=) 15...Rb7 (15...Bf6 16.Nd4 Ra8 17.Ra8 Ra8 18.f3 Bd4 19.Qd4+=) 16.Nd4= Qe8 (16...Rfb8 17.f3 Nf6 18.Bc3= (worse is 18.Ne6 Qe6 19.Qd3 Nd7+=)) 17.Nc2 (17.f3 Nf6+=) 17...Bg5 (17...Bf6 18.Nd4=) 18.Nc3= Bf5 (18...f5 19.f3 Nf6 20.Bg3=) 19.Ne4 (19.Nd4 Bf6=) 19...Qe4 Attacks the backward pawn on b4 20.Nd4 Bf6 21.Bc3 h6 (21...Be5 A) worse is 22.Nf5 Bc3 (22...Qf5?! 23.Qd2=) 23.Rc1 Qf5 (23...Qb4?! 24.Qc2 Bb2 25.Rb1=) 24.Rc3 Rb4–/+; B) 22.Ra6=) 22.Qb3 (22.Qd2 Bd4 23.Bd4 Qc2+=) 22...Re8 (22...Bd7 23.Ra6=) 23.Nc6 (23.Nf5 Qf5 24.Bf6 Qf6=) 23...Bh3 Threatening mate... how? 24.gh3 Bc3 25.Qc3 Qg6 26.Kh1 Qc6 27.Qd4 (27.f3 Qe6+=) 27...Re4 28.Qd3 (28.Ra8 Kh7 29.Qd3 Rbb4+=) 28...Rbb4–/+ 29.Ra6 (29.Qa6 Qd7–/+) 29...Qc5 30.Ra8 (30.Rd1 Rb2 31.Ra8 Kh7–/+) 30...Kh7 31.f3 (31.Rd1 Rb2 32.f3 Qd6 33.Qe4 de4 34.Rd6 cd6 35.fe4 Rb4–+) 31...Qc4–+ 32.Qc4 (32.Ra3 Qd3 33.Rd3 Re7–+) 32...Rec4 (32...Rbc4?? 33.fe4 Re4 34.Rf7+–) 33.Ra2 (33.Kg2 Rb3 34.Re1 c6–+) 33...c6 (33...Rb3 34.Re1–+) 34.Ra7 (34.Kg2 Rc3 35.Kf2 g5–+) 34...Kg6 (34...Rc2 35.e4–+) 35.Rg1 (35.Kg2 Rc3 36.Re1 Kf6–+) 35...Kf6 36.Kg2 Rc2 37.Kh1? (37.Kg3–+) 37...Rbb2 (37...Rbb2 38.Rg3 Rh2 39.Kg1 Rhe2–+) 0–1. Hasler,Ulrich – Freire,Daniel J, corr ICCF II–GT–20, 1993.

5.cd5 Bd5 6.Nc3 Bb4?? 7.Nd5 Qd5 8.Bg7 +–.

5.cd5 Bd5 6.Nc3 Bb4?? 7.Nd5 Bf8 8.Qg4 Qd5 9.Bg7 Bg7 10.Qg7+–.

5.cd5 Bd5 6.Nc3 f5 7.Nd5 Qd5 8.Rc1 (8.a3 a5=) 8...c6 (8...Qa2 9.Qc2 Qd5= (9...Bb4?? 10.Bc4 Qa5 11.Bg7+–)) 9.Bc4 Qd7 10.Qh5 Kd8 11.Ne2 Bb4 Attacks the backward pawn on d2 12.0–0 (12.Qg5 Kc7 13.Be5 Kb6+/–) 12...Nf6+= (12...Bd2? 13.Rfd1 Kc7 14.Rc2+–) 13.Qg5 Rf8 14.Nf4 Kc8?? (better is 14...Ke8+/–) 15.Be6+– 1–0. GuestPDSK – GuestQYKX, freechess.org, 2017.

5.cd5 Bd5 6.Nc3 Nf6 7.Nd5 Qd5 8.Qa4 c6 9.b5 cb5 (9...Nbd7!?=) 10.Bb5+= Nc6 11.Bf6 gf6 12.Rc1 (12.Ne2 f5 13.Nd4 a6+/–) 12...Rc8 13.Bc6 (13.Ne2 a6 14.Bc6 Rc6+–) 13...bc6 (13...Rc6 14.Ne2 b5 15.Qa7 Rc1 16.Nc1+=) 14.Qa7 (better is 14.Ne2 f5 15.Qa7+/–) 14...Bc5?? (better is 14...Rd8 15.Qd4 Qd4 16.ed4 Kd7+=) 15.Qc5 Qa2 16.Ne2 Qb2 (16...Qe6 17.Rc4 Rg8 18.Nf4+–) 17.Rc2 (17.Rc2 Qa1 18.Nc1+–) 1–0. GuestXKVR – GuestBPBH, freechess.org, 2017.

5.cd5 Bd5 6.Nc3 Nf6 7.Nd5 Qd5 8.Bf6 gf6 9.a3=.

5.cd5 Bd5 6.Nc3 Nf6 7.Nd5 Nd5 8.a3 (8.Qg4 Be7 9.Rc1 Nb4 10.Qg7 Rf8 11.Qh7 Na2+–) 8...Bd6? (8...Qh4!?=) 9.Bg7 (9.Qg4!? Be7 10.Bc4+– (10.Bg7?! Rg8=)) 9...Rg8+/– 10.Bd4 (10.Bb2 Qe7+/–) 10...Nc6+= 11.Bb5 Qe7 (better is 11...Nde7!? 12.Qh5 Rg2 13.Qh7 f5+/–) 12.Bc6 bc6 13.g3 (13.Qc2!? 0–0–0 14.g3 Kb8+–) 13...Kd7 14.Rc1 a5 15.Qa4 Ra6 (15...Qe8 16.Qc6 Ke6 17.Qc4 ab4 18.ab4+–) 16.b5 cb5?? (better is 16...Raa8 17.Rc6 Rgb8+–) 17.Qb5 (17.Qb5 c6 18.Qa6+–) 1–0. GuestNSDK – EEIT, freechess.org, 2017.

4.c4 Nf6

5.a3 (--> 4.a3 Nf6 5.c4).

5.b5 (--> 1.b4 e5 2.Bb2 e4 3.e3 Nf6 4.b5 d5 5.c4).

5.Nc3 c6 6.cd5 Bb4 7.Nge2 0–0 8.Ng3 Bc3 9.Bc3=+ cd5 10.d4 a5 11.Bb5 Bd7 12.a4 Bb5 13.ab5 b6 14.0–0 Qd7 15.Qa4 Qd8 16.Nf5 g6 17.Nh6? Kg7–+ 18.f3 Kh6 19.fe4 Ne4 20.Bb2 Nd2 21.Rf4 Kg7 22.e4 Ne4 23.Raf1 Ra7 24.Qd1 Nd7 25.Qf3 Ndf6 26.Ba3 Nd2 27.Bf8 Qf8 28.Qh3 Nf1 29.Kf1 Qe7 30.Rh4 Ra8 31.Qg3 Re8 32.Qg5 Qe1 0–1. gtate (1970) – rsuzukovich (1945), net–chess.com, 2006.

5.cd5 Bf5 6.Qa4= Bd7 (better is 6...c6=) 7.Bb5 (7.b5 Bf5 8.Ne2 Nbd7+= (worse is 8...Qd5 9.Ng3+/–)) 7...c6 (better is 7...Nd5!? 8.a3 Qg5–/+) 8.dc6= Nc6 9.Bc6 bc6 10.Qb3 (10.f3 Be7=) 10...Rb8 11.Qc3 (better is 11.Qc2!?=) 11...Bb4–/+ 12.Qe5 Be7 (12...Be6 13.Bd4–/+) 13.Ba3 0–0?? (better is 13...Rb5 14.Be7 Qe7+=) 14.Qe7 (14.Be7 Re8 15.Bd8 Re5+–) 14...Qc7? (14...Qb6+–) 15.Bd6 Qb6 16.Bb8 Rb8 17.Nc3 Nd5 (17...Be6+–) 18.Nd5 cd5 (18...Qb2 19.Rd1 Bg4 20.f3 ef3 21.gf3+–) 19.Qd7 Qb2 20.Rd1 Qa2 21.Ne2 Rf8 (21...Qa5 22.Rc1 Rf8 23.Nd4+–) 22.Nc3 Qa6 (22...Qa5 23.Qf5+–) 23.Nd5 (23.Qd5 Qc8+–) 23...Qd3 (23...Ra8 24.Rc1 Rf8 25.Rc6 Qa1 26.Ke2+–) 24.Ne7 (24.f3 a5+–) 24...Kh8 25.Qd3 ed3 26.0–0 Ra8 (26...g6 27.Ra1+–) 27.Rc1 a5 (27...a6 28.Rc3 g6 29.Rd3+–) 28.Rc8 Rc8 29.Nc8 a4 30.Ra1 h5 31.Ra4 g5 32.Rd4 (32.h4 gh4 33.Rh4 Kg7+–) 32...h4 33.Rd3 h3 34.gh3 g4 1–0. GuestQSSN – GuestYZWH, freechess.org, 2017.

5.Bf6 Qf6 6.Nc3 dc4 7.Bc4 –/+.

5.cd5 Nd5

6.a3 a5 7.Qa4 Bd7 8.b5 =.

6.a3 a5 7.ba5 c6 (better is 7...Be7!?+=) 8.Nc3+= Nf6 (8...Nc3 9.Bc3 (worse is 9.dc3 Nd7+=) 9...Nd7 10.Ne2+=) 9.Qc2+/– Bf5 10.Nf3 (10.Nge2 Qa5 11.Ng3 Be7+/–) 10...Qa5 11.Ng5 Qc5 (11...Be7 12.Nce4 0–0 13.Bd3 Ne4 14.Ne4+/–) 12.Qb1 Nbd7 (12...Qe7 13.f3 Nbd7 14.Nce4 (14.fe4?! Bg6=) 14...Ne4 15.Ne4 (15.fe4?! Bg6 16.Nf3 Qe4 17.Qe4 Be4=) 15...Be4 16.fe4+/–) 13.Nce4 Ne4 14.Ne4 Qd5 15.Bd3 Ra6 (15...Ne5 16.Be5 Qe5 17.f4+/–) 16.Qc2 (16.Ba6 Be4 17.Qc1 ba6–/+) 16...Rb6 17.Bd4 c5 (17...Ne5 18.Be5 Qe5 19.0–0+/–) 18.Bc3 (18.Nc5 Bc5 19.Bf5 Bd4+/–) 18...Bg6 (18...Be7 19.0–0 Bg6 20.f3+/– (20.Bg7 Rg8–/+)) 19.f3 c4 20.Be2 f5 21.Nf2 Kf7 (21...Rc6 22.0–0 Kf7 23.Nh3+–) 22.e4 fe4 23.fe4 Bc5 (23...Ke8 24.0–0 Nf6 25.Qa4 Qd7 26.Qc4+–) 24.Qa2 (24.ed5?! Bc2 25.0–0 Bd3 26.Bd3 cd3+–) 24...Bf2 (24...Be4?? 25.Bc4 Re6 26.0–0+– (26.Bd5?! Bd5 27.Kd1 Ba2 28.Ra2 Rhe8+=)) 25.Kf2 Qg5 (25...Be4?? 26.Bc4 Nf6 27.Bd5 Bd5 28.Qc2 Ne4 29.Kg1+–) 26.h4 (26.Bc4?! Ke7 27.Rhe1 Ne5+–) 26...Qf4 (26...Qc5 27.d4 Qc6 28.Qc4 Ke8 29.d5 Qc4 30.Bc4 Be4 31.Rhe1 (31.Bg7?! Rg8 32.Bd4 Rd6+/–) 31...Rf8 32.Kg3 Rg6 33.Kh3+–) 27.Kg1 Ke7 (27...Qe4 28.Bc4 Ke7 29.Rh3 Rb1 30.Rb1 Qb1 31.Qb1 Bb1 32.Rg3+–) 28.Rh3 Rc8 (28...Kd8 29.e5 (29.Bg7?! Rg8 30.Bd4 Be4 31.Bb6 Nb6+/–) 29...Re8 30.Rf1+–) 29.Rf1 Qd6 30.h5 (30.Bg7?! Be4 31.Re3 Qg6+–) 30...Bf7 31.e5! Qc5 (31...Ne5 32.Be5 Combination) 32.Re3 Be6 (32...Ra8 33.Rf7! Kf7 34.e6 Ke8 35.ed7 Kd7 36.Qc2+–) 33.Qc2 Rf8 (33...h6 34.Qg6 Rg8 35.Kh2+–) 34.Qh7 Kd8 35.Qg7 Rg8 36.Qh7 Rb3 (36...Bd5 37.Rf2 Nf8 38.Qf5+–) 37.Qh6 Re8 (37...Bd5 38.Bf3 Rb6 39.Qf4+–) 38.Qf4 Ra3 (38...Kc8 39.h6 Rf8 40.Qe4 Ra3 41.Bf3+–) 39.Bd4 Qa5 (39...Qe7 40.Ra3 Qa3 41.Ra1+–) 40.h6 Re3 41.Qe3 Qb4 (41...Kc7 42.h7 Rh8 43.Qh6+–) 42.Bf3 Kc7 (42...Rf8 43.Ra1 Kc7 44.Be4+–) 43.Be4 Qb3 (43...b6 44.Rb1 Qa5 45.Ra1+–) 44.Qg5 c3 (44...Qb4 45.Rb1 Rg8 46.Qe3+–) 45.dc3 Qa2 (45...Bd5 46.Bg6 Rd8 47.h7+–) 46.h7 b6 47.c4! Qa3 (47...Qc4 48.Rc1 Pinning (48.Rc1 Decoy); 47...Bc4 48.Ra1 Combination) 48.Ra1 Qf8 49.Qd2 1–0. Rooijen Van,Peter (1705) – Correa De Almeida,Claudio (1655), SC–2011–0–00104, 2011.

6.a3 a5 7.Nc3 ab4 8.Nd5 Qd5 9.ab4 Ra1 10.Ba1 =+.

6.a3 c6 7.Nc3 (7.Qc2 A) 7...Bf5 8.Nc3 (8.Ne2 Nd7 9.Ng3 Qg5 10.Nc3 Nc3 11.Bc3 Nf6 12.b5 c5) 8...Nc3 9.Bc3 Nd7 10.Ne2 Nf6 11.Ng3 Bg6 12.Rc1 Be7; B) 7...a5 B1) 8.b5 f5 (8...Qe7 9.Nc3 Nc3 10.Bc3 Bd7 11.a4 cb5 12.ab5 a4) 9.Nc3 Nd7 10.Nh3 N7f6 11.bc6 bc6 12.Rc1 Bd7; B2) 8.Nc3 ab4 (8...Be7 9.Ne4 0–0 10.b5 cb5 11.Bb5 f5 12.Nc3 Be6) 9.Qe4 Be7 10.Nd5 cd5 11.Qb1 0–0 12.ab4 Ra1; B3) 8.Qe4 Qe7 9.Qe7 Be7 10.Nc3 0–0 11.ba5 Nf6 12.Nf3 Ra5; C) 7...f5 8.Nc3 a5 (8...Kf7 9.Be2 Bd6 10.Nh3 Be6 11.Nd5 cd5 12.Nf4 Bf4) 9.Nd5 cd5 10.Rc1 Nd7 11.Nh3 ab4 12.ab4 Nf6) 7...Be7 (7...a5!?= 8.Ne4 (8.ba5 Nc3 9.Bc3 Nd7 10.Nh3 Ra5 11.Qc2 Nf6 12.Ba5 Qa5) 8...ab4 9.ab4 Ra1 10.Qa1 Nb4 11.Qb1 N8a6 12.Nh3 Bf5; 7...Nc3 8.Bc3 Nd7 9.Ne2 Nf6 10.Ng3 Be6 11.Qc2 Bd5 12.Rd1 a6) 8.Ne4+= 0–0 9.Nf3 b5 (9...a5 10.Be2 Bf5 11.Ng3 Bg4 12.h3 Bf3) 10.Be2 (10.Nd4 a5 11.ba5 f5 12.Nc3 Bf6) 10...Bf5 (10...a5 11.0–0+= (11.ba5 Qa5 12.0–0 Qa4) 11...ab4 12.ab4 Na6) 11.Ng3 Bg6 12.h4 (12.Ne5 a5) 12...h6 13.h5 Bh7 14.0–0 Nd7 (14...a5 15.ba5 Qa5 16.e4+=) 15.Qb3 Bd6 (15...a5 16.Nd4 a4 17.Qa2+/–) 16.Rac1 Bg3 17.fg3 Be4 18.Nd4 Qg5 19.Bf3 (19.Nc6!? N5f6 20.Ne7 Kh8 21.Rf4+/–) 19...Bf3+= 20.Rf3 (worse is 20.gf3 Qg3 21.Kh1 Rfe8–/+) 20...Qh5 (20...Ne7!?+=) 21.Nc6+– N7f6? (better is 21...N5f6 22.Bf6 Nf6+–) 22.Rc5 Qg6 (22...Qg4 23.Rd5 Nd5 24.Qd5 Qe6+–) 23.Bf6 (23.Rd5?! Nd5 24.Bf6 gf6 25.Qd5 Qg5+=) 23...Nf6 (23...gf6 24.Qd5 Kg7 25.Rb5+–) 24.Ne7 (24.Ne7 Kh7 25.Ng6 fg6 26.Rb5+–) 1–0. Valverde,Mario (2055) – Bonato,Osiris (1870), CiF, 2009.

6.a3 Nc6 7.Nc3 Nc3 8.Bc3=.

6.a3 Nc6 7.d3 Bf5 8.b5 Nb8 9.de4 Be4 10.Nf3 Nf6 11.Qd8 Kd8 12.Bf6 gf6 13.Be2 Bg7 (better is 13...Bb1!? 14.Rb1 Ba3+=) 14.Nc3+/– f5 15.Rc1 a6 16.Ne4 h6?? (16...fe4 17.Ng5 Rf8 18.ba6 Na6 19.Ne4 c6+/–) 17.Nc5 Kc8 (17...Bb2 18.Nb7 Kc8 19.Nd6 Kd7 20.Nf7 Bc1 21.Nh8 Ba3 22.Kd2+–) 18.Bd3 c6 19.b6 Bb2 20.Bf5 Kd8 21.Rd1 Ke7 22.Rd3 Kf6 23.g4 a5 24.Rb3 (24.Rb3 Ba3 25.Ra3+–) 1–0. Pcmvr – Nadare, playchess.de, 2005.

6.a3 Be6 7.Nc3 (7.d3 Nf6=) 7...Nf6 (7...Nc3 8.dc3 Bd6 9.Qd4+=) 8.Qc2 (8.d3 ed3 9.Bd3 Bd6=) 8...Bf5 9.Nf3 Nc6 (worse is 9...ef3 10.Qf5 fg2 11.Bg2+=) 10.Nh4 White gets in control 10...Qd7 11.Nf5 Qf5 12.f3 Bd6 (12...Qe6 13.Ne4 Ne4 14.Qe4 Qe4 15.fe4+/–) 13.Bb5 0–0 (13...Qd7 14.Ne4 Ne4 15.Qe4 Kf8 16.Bc6 bc6 17.0–0+–) 14.Bc6+– bc6 15.Ne4 Ne4 16.fe4 Qg5 17.0–0 c5 18.e5 Be5 19.Rf5 (worse is 19.Qc5 Rfe8+/–) 19...Qf5 20.Qf5 Bb2 21.Rb1 (21.Ra2 Ba3 22.Qc5 Bb4 23.Qb4 Rab8+–) 21...Ba3+/– 22.bc5 a5 (22...Rfb8 23.Rb8 Rb8 24.d3+/–) 23.Rb7+– Bb4 24.d4 Bd2 25.Qf2 (25.Qd3 Bb4 26.Rc7 Rfc8+–) 25...Bc1 (25...Bb4 26.Rc7 a4 27.e4+–) 26.Qe1 Ba3 27.Rc7 Bb4 28.Qd1 Rfe8 29.Qf3 Rf8 (29...f5 30.Qf5 Kh8 31.Qd7+–) 30.Rf7! Rf7 Theme: Deflection from a8 (30...g6 31.Rf8 Rf8 32.Qd5 Kg7 33.e4+–) 31.Qa8 Rf8 32.Qd5 Kh8 33.c6 (33.Qd6 Re8+–) 33...a4 (33...Bd2 34.Qb3+–) 34.c7 a3 35.Qc4 a2 The mate threat is a1Q 36.Qa2 Bd6 37.Qc4 Bc7 (37...Rc8 38.Qe6 h6 39.Qc8 Bf8 40.Qf8 Kh7 41.Qf5 g6 42.Qd7 Kg8 43.c8Q) 38.Qc7 Re8 39.d5 (39.e4 Kg8+–) 39...h6 (39...Kg8+–) 1–0. Woschkat,Karl_Heinz – Dreger,Christian, compuserve, 1996.

6.a3 Bf5 7.Ne2 f6+/= 8.Nbc3 (8.Nd4 Bg6+/– (8...Qd7 9.Nc3 Nc6 10.Bb5 a6 11.Bc6 bc6 12.0–0 Bd6 13.Qc2 Nc3) 9.Bc4 Qd7 10.Nc3 Nc3 11.Bc3 Nc6 12.Be6 Qe7 13.Qa4 Qd6; 8.Ng3 Bg6 (8...Qd7 9.Nc3 Nc3 10.Bc3 Bd6 11.Nf5 Qf5 12.Qc2 Qg6 13.d3 Nc6) 9.Bc4 Nb6 10.Be2 Nc6 11.Nc3 f5 12.0–0 Bd6 13.Qb3 Qe7; 8.d3 ed3 9.Nd4 Bg6 10.Bd3 Qd7 11.Nc3 Nc6 12.Bb5 a6 13.Qa4 Nb6) 8...c6 (8...Nc6 'Consolidates b5+d5' 9.Ng3 (9.Qb1 a5 10.Ng3 Bg6 11.b5 Nc3 12.Bc3 Ne5 13.Be5 fe5) 9...Nc3 10.Bc3+/– Qd5 11.Nf5 Qf5 12.f3 Qh5 13.f4 Qd1) 9.Nd4 Bg6 '+/–' (9...Nc3 10.dc3 Bg6 11.Be2 Qd7 12.0–0 Na6 13.Qc2 Bd6) 10.Nd5 (10.Qb3 Bf7 (10...Nc3 11.dc3 Bf7 12.Qc2 Qe7 13.g3 Nd7) 11.Bc4 (11.Ne4 Nd7 12.Qc2 Be7 13.Bd3 0–0) 11...Qd7+/– (11...Nd7 12.Nd5 Ne5 13.Nc6 bc6) 12.Ne4 Be7 13.0–0 0–0; 10.Bc4 Nc3 11.Bc3 Qd6 12.Qg4 Nd7 13.Nf5 Bf5) 10...Qd5 11.Rc1 '+/=' (11.Qc2 Bf7 12.Be2 Nd7 13.0–0 Bd6) 11...Kd7 (better is 11...Nd7 '?' 12.Bc4 and Black has air to breath 12...Qd6+= 13.0–0 Ne5; 11...b5 12.h4 h5 13.Qc2 a5) 12.Bc4 Qg5 '+–' 13.Be6 (13.0–0 Bd6+–) 13...Kc7 (13...Ke8 14.Bc8 a5 15.Bb7+–) 14.Bh3 Bf7 15.Qa4 (better is 15.d3 a5 16.b5+–) 15...Bd6 (better is 15...Qd5 '??' 'shortens the misery for Black' 16.Nb5 Kd8+–) 16.Nb5 Kd8 17.Nd6 Ke7 (17...Qd5 18.Nb7 cannot change what is in store for? 18...Ke7 19.b5+–) 18.Nf7 Kf7 19.Qb3 Kg6 (19...Qd5 20.Qd5 doesn't do any good 20...cd5 21.Bc8+–) 20.Rc5 Qh6 21.Bf5 Kg5N 22.h4 Qh4 23.Bh7 f5 24.Rf5 Kg4 25.Qd1 1–0. De Andres Trelles,FJ – Arnaiz Esteban,JF, Valladolid CC Social (2), 1980.

6.a3 Nf6 7.Bf6 Qf6 8.Nc3 Bf5 9.g4 Bg6 10.Bg2 Qe6 11.Nh3 Be7 12.Nf4 Qf6 13.h4 h6 14.Ng6 fg6 15.Nd5 Qe6?? (15...Qe5 16.Be4! Qe4 17.Nc7 Kd7=) 16.Nc7 (16.Nc7 Kf7 17.Ne6 Ke6 18.Qc2+–) 1–0. pcmvr (2860) – blinddog (2275), net–chess.com, 2011.

6.Qa4 Bd7 7.b5 Qe7 (7...Bf5 8.Nc3 Nb4 9.a3 Nd3 10.Bd3 Qd3 11.b6 c6 12.Qa5=) 8.Nc3= Nc3 9.Bc3 a6 10.Rb1 Qe6 (10...f5 11.d4=) 11.f3 (11.d3 ed3 12.Bd3 c6+=) 11...ef3 12.Nf3 Bd6 (12...Qg6 13.Rb2 f6 14.Be2+=) 13.Bd3 0–0 (better is 13...f6!?+=) 14.Bh7!+/– Kh7?? (better is 14...Kh8+/–) 15.Ng5+– Kg8 16.Ne6 fe6 (16...Be6 17.Qd4 f6 18.Qe4+–) 17.Qd4 e5 (17...Rf7 18.Rf1 Re7 19.ba6 b5+–) 18.Qd5 Kh8 19.Qb7 ab5 20.Qa8 Bc6 21.Qa7 Nd7 22.Qa6 Bg2 (22...Nb8 23.Qa5 Nd7 24.Ba1+–) 23.Rg1 Bh3 (23...Be4 24.Qb5 Nc5 25.d4 Nd3 26.Kd1+–) 24.Rb5 Nc5 (24...Bf5 25.Qc6 Rf6+–) 25.Rc5! Bc5 26.Be5 Re8 27.Qh6 Kg8 28.Qg7 1–0. DEFFM – Ramshad, freechess.org, 2017.

6.Nc3 Nb4 7.Ne4= (7.Nh3 A) 7...N8a6 8.Ne4 Nd3 (8...Bf5 9.d3 Be4 10.de4 Nc5 11.Nf4 Ne4 12.Bc4 Qd1 13.Rd1 Nd6 14.Bb3; 8...Bh3 9.gh3 Qd5 10.f3 0–0–0 11.a3 Nd3 12.Bd3 Qd3 13.Rg1 f5 14.Nf2) 9.Bd3 Qd3 10.Qf3 Bh3 11.gh3 Nb4 12.Qf5 Qc4 13.Rb1 Nd3 14.Kd1; B) 7...N8c6 B1) 8.a3 Bh3 9.ab4 Bf5 10.Qb3 Bb4 (10...Nb4 11.Bc4 Qd7 12.0–0 c6 13.Ra5 0–0–0 14.Ba3) 11.Nd5 Be6 12.Bc4 b5 13.Bb5 Bd2 14.Kd2; B2) 8.Nf4 Bd6 9.Ne4 (9.a3 Bf4 10.ab4 Be5 11.b5 Nb4 12.Ra4 c5 13.bc6 Nc6 14.Qb3; 9.g3 Bf5 10.g4 Bd7 11.a3 Bf4 12.ab4 Be5 13.b5 Nb4 14.Qb1) 9...Bf4 10.ef4 0–0 11.f3 Re8 12.Kf2 Bf5 13.d3 Nd4 14.Qd2; B3) 8.Ne4 B31) 8...Bh3 9.gh3 Qd5 10.f3 (10.Ng3 0–0–0 11.a3 Nd3 12.Bd3 Qd3 13.Nh5 Rg8 14.Rg1) 10...0–0–0 11.a3 Nd3 12.Bd3 Qd3 13.Rg1 (13.Rc1 Qd7 14.Nf2) 13...f5 14.Nf2; B32) 8...Bf5 9.f3 (9.Qf3 Qd5 10.Nhg5 0–0–0 11.Bc4 Qc4 12.Qf5 Kb8 13.Qf7 Nd3 14.Kf1) 9...Bh3 10.gh3 Qh4 11.Nf2 0–0–0 12.Rg1 Nd5 13.Rg4 (13.Qe2 Bb4 14.Rg4) 13...Qh6 (13...Qh5 14.Qb3) 14.Qb3; B33) 8...Nd3 9.Bd3 Qd3 10.Qf3 (10.f3 Bh3 11.gh3 Nb4 12.Rc1 Qa6 13.Nf2 Qa2 14.Bd4) 10...Bh3 11.gh3 0–0–0 12.a3 Kb8 13.Rg1 Ba3 14.Ra3) 7...Bf5 (7...N8c6 A) 8.Nh3 Bh3 (8...Bf5 9.d3 Qe7 10.a3 Nd3 11.Bd3 Be4 12.Be4 Qe4 13.0–0 Rd8; 8...Nd3 9.Bd3 Qd3 10.f3 Bh3 11.gh3 Nb4 12.Rc1 Qb5 13.Nf2 Na2; 8...Qe7 9.Qb1 f5 10.Neg5 h6 11.Nf3 Qc5 12.Bc3 Nd5 13.Bb2 Bd7) 9.gh3 Qd5 10.f3 0–0–0 11.a3 Nd3 12.Bd3 Qd3 13.Rg1 f5; B) 8.a3 Nd3 9.Bd3 Qd3 10.Qf3 h5 11.Qf4 Be6 12.Nf3 0–0–0 13.Bd4 f6; C) 8.d3 f5 (8...Nd5 9.a3 f5 10.Nc3 Be6 11.Nh3 Bf7 12.Nd5 Qd5 13.Qd2 0–0–0) 9.Nc3 Be6 10.Nh3 Nd5 11.Nd5 Bd5 12.a3 Qd6 13.Nf4 0–0–0; D) 8.Rc1 Bf5 (8...Qd5 9.Nc3 Nd3 10.Bd3 Qd3 11.Qe2 Qe2 12.Nge2 Bf5 13.Nb5 Kd7; 8...Nd3 9.Bd3 Qd3 10.Qf3 h5 11.h3 f5 12.Ng3 Bb4 13.Qe2 Qe2) 9.Qf3 Qd5 10.Ng5 Qf3 11.N1f3 h6 12.Nh4 Bd3 13.Ngf3 0–0–0; E) 8.Nf3 Bf5 (8...Nd3 9.Bd3 Qd3 10.Qb1 Qb1 11.Rb1 Be6 12.a3 0–0–0 13.Rc1 Bd5) 9.Qb1 Qd5 10.Nc3 Nd3 11.Bd3 Qd3 12.e4 Qb1 13.Rb1 Be6; F) 8.Ng3= Qd5 (8...Be6 9.Nh3 Bh3 10.gh3 Nd3 11.Bd3 Qd3 12.Qb1 0–0–0 13.Qd3 Rd3) 9.e4 Qd6 10.Nf3 Bg4 11.d4 Bf3 12.gf3 Nd4 13.Rc1 0–0–0) 8.d3 Be4 (8...Qe7 9.Qa4 N8c6 10.a3 Be4 11.de4 Qe4 12.Ke2 0–0–0 13.ab4 Bb4; 8...N8c6 9.a3 Be4 10.de4 Qd1 11.Rd1 Nc2 12.Kd2 Na3 13.Ra1 0–0–0; 8...Nd5 9.a3 c5 10.Nf3 Nc6 11.Nfd2 Qa5 12.Qf3 Bg6 13.Be2 f5) 9.de4 Qd1 10.Rd1 (10.Kd1 N8a6 11.Ba6 Na6 12.Ke2 Nc5 13.Rc1 0–0–0) 10...Nc2 (10...Na2!? 11.f3 (11.Bb5 c6 12.Bc4 Bb4 13.Ke2 Nc3) 11...Nb4= 12.Kf2 a5 13.Bc4 a4) 11.Kd2 (11.Ke2 Nc6+/– 12.Nf3 f6 13.Rc1 N2b4) 11...Nb4 12.a3 N4c6 (12...N4a6 13.Ne2 Nc6) 13.Nh3 (13.Nf3 Nd7) 13...Na6 (13...Nd7+/–) 14.Kc2 Nc5 15.e5 Ne4 (15...Be7!?+/–) 16.Bc4 a6 (16...Be7 17.f3 Nc5 18.Nf4+/–) 17.f3+– Nc5 18.Ng5 Ne6 (18...Be7 19.Nf7 Rf8 20.e6+–) 19.Be6 (19.Ne6 fe6 20.Be6 Rd8+–) 19...fe6 20.Ne6 Be7?? (20...Rc8+–) 21.Nc7 Kf7 22.e6 Kg6 23.Na8 Ra8 24.e4 Rc8 25.f4 Nd4 (25...Bf6 26.Kb1 Bb2 27.Kb2+–) 26.Kb1 Ne2 (26...Nb5 27.Rd7 Ba3 28.f5 Kg5 29.Rg7 Kh6 30.f6+–) 27.Rd7 Bc5 (27...Bf6 28.f5 Kh6 29.Rb7+–) 28.f5 Kg5 (28...Kh6 29.Bg7 Kg5 30.Be5+–) 29.Rg7 Kf4 30.Rb7 Ke3 (30...Kg5 31.f6 h5 32.f7+–) 31.e7 Kf2 32.f6 Kg2 33.Rd1 Be7 34.fe7 Kh2 35.Rd8 Nc3 36.Bc3 1–0. Anonymous – taffiq, internet, 2011.

4.d3 Bb4

5.c3 Bd6 6.Qh5 (6.c4 Nf6–/+) 6...Nf6–+ 7.Qg5 h6 8.Qg7 Rh7 9.Qh7 Nh7 10.Bb5 (10.c4 Nf6–+) 10...c6 11.Ba4 Nd7 12.Ba3 Ba3 13.Na3 Qa5 14.Ne2 Qa4 15.0–0 (15.Nb1 b6–+) 15...Qa3 16.Nf4 Qc3 17.g3 Ng5 18.Rac1 Nf3 19.Kh1 Qd2 20.Rfe1 Ne1 21.Re1 Qe1 (21...Qe1 22.Kg2 Qa1–+) 0–1. Phunky – marekt, ChessWorld.net, 2003.

5.c3 Be7 6.Nd2 Nf6 7.de4 de4 8.Qc2 0–0 9.Ne4= Ne4 10.Qe4 Ba3?? 11.Ba3+– Re8 12.Qd3 Qf6 13.Nf3 Bf5 14.Qc4 c6 15.Be2 b5 16.Qd4 Qg6 17.Nh4 Qe6 18.Nf5 Qf5 19.Rd1 Na6 20.Bf3 Rac8 21.Bg4 Qg6 22.0–0 Ra8 23.Bf3 Nc7 24.Qd6 Qd6 25.Bd6 Ne6 26.Bc6 1–0. wlittle (2185) – winston (1875), net–chess.com, 2004.

5.Nd2 ed3 6.Bd3 Bf8 (6...Nf6 7.Ngf3–/+) 7.Ngf3+= Bg4 (7...Nd7 8.0–0+=) 8.0–0 (8.c4 Nc6=) 8...Nc6 (8...Nd7 9.c4 Nc5 10.Be2+=) 9.h3 Bh5 10.c4 Nf6 (10...dc4 11.Bc4 (worse is 11.Nc4 Bf3 12.gf3 Qh4+=) 11...Nf6 12.Bb5=) 11.cd5 (11.Bf6 gf6 12.Qb3 Na5 13.Qa4 c6 14.cd5 Qd5+=) 11...Nd5= 12.Bb5 (12.Qb3 Qd6 13.Be4= (13.Qb7? Rb8 14.Nc4 Qd7–+)) 12...Nf6 (12...Qd7!?=) 13.Bc6 (13.Qa4 Nd7+=) 13...bc6 14.Qc2 (14.Qa4 Rb8 15.Rfb1 Nd7+/–) 14...Bf3 (14...Rb8 15.Rfc1 Nd7 16.Rab1+=) 15.Nf3+/– Qd6 16.Rfd1 Qe6 (16...Qc5 17.Qd3 Qb5 18.Bf6 Qd3 19.Rd3 gf6+=) 17.Nd4 (17.Ng5 Qd6 18.Ba3 Rd8 19.Bd6 Bd6 20.Qc6 Ke7+–) 17...Qc8?? (better is 17...Qe4+/–) 18.Qc6+– Nd7 19.Nb5 (19.Qe4 Be7 20.Nc6 Qd8+–) 19...Bd6 (19...Rb8 20.Qe4 Be7 21.Na7 f5 22.Qf5 Rf8+–) 20.Rd6 cd6 21.Nd6 Ke7 (21...Kd8 22.Nc8 Rc8 23.Qd5+–) 22.Nc8 (22.Qc8?! Rhc8 23.Nc8 Rc8 24.Bg7 f6+–) 22...Rac8 23.Ba3 (23.Qe4 Kd8+–) 23...Ke8 1–0. GuestKCJH – GuestSMMJ, freechess.org, 2016.

5.Nd2 Nf6–/+ 6.a3 Ba5 7.d4 (7.c3 Bf5–/+) 7...Nc6 8.c4 Be6 9.c5 Qe7 (9...0–0 10.Ne2–+) 10.Bb5 Bd7 (10...Qd7 11.Qa4–/+) 11.Ne2 a6 12.Ba4 Ng4 (12...b5 13.cb6 cb6 14.Bc6 Bc6 15.Bc3–/+) 13.0–0 Qh4 14.h3 h5?? (14...Bd2 15.Qd2 Nf6 16.Bb3–/+) 15.Nf4 (better is 15.Nb3 b5 16.cb6 Bb6 17.Qc2+= (17.hg4 hg4 18.f3 gf3 19.Rf3 ef3–+)) 15...f5?? (better is 15...Bd2 16.Qd2 Nf6=+) 16.Ng6+– (16.hg4 hg4 17.f3 gf3 18.Nf3 ef3 19.Qf3 b5=+) 16...Qf6 17.Nh8 g5 18.hg4 hg4 19.g3 0–0–0 20.f4 gf3 21.Kf2?? Rh8–/+ 22.Rh1? Rf8?? 23.Nb3+/– f4? 24.Bc6+– fg3 25.Kg3 Bc6 26.Na5 b6 27.cb6 Qd6 28.Kf2 g4 29.b7 Kd7 30.Nc6 g3 31.Ke1 Qc6 32.Rh7 Ke6 33.Rh6 Rf6 34.Rf6 Kf6 35.b8Q g2 36.Qf8 Ke6 37.Qg8 Kd7 38.Kf2 Qh6 39.Qd5 Kc8 40.Qg8 Kd7 41.Qa4 1–0. maxii – tao, Live Game Caissa's Web, 2004.

4.d4 Bb4

5.c3 (5.c3 Bd6 6.Ba3–+). poyntman – topper, internet, 2007.

5.c3 Bd6 6.Nd2 Nf6 7.c4 c6 8.c5 Bc7–+ 9.g3 0–0 10.Bg2 Bg4 11.Ne2 Na6 12.a3 Qd7 13.0–0 Bh3 14.Nf4 Bf4 15.ef4 Qf5 16.f3 e3 17.g4 Qd3 18.Qb3 Qd2 19.Bh3 e2 20.Rfe1 Qf4 21.Re2–/+ h5 22.gh5 Nh5 23.Qb7 Qf3?? 24.Bf1+/– Nf4 25.Rf2 Qg4 (25...Qg4 26.Kh1 Qh4+/–). lilgia – DrSub (1630), internet, 2007.

5.c3 Bd6 6.Qh5 Nf6–+ 7.Qg5 h6 8.Qg7 Rh7 9.Qh7 Nh7 10.Bb5 c6 11.Ba4 Nd7 12.Ba3 Ba3 13.Na3 Qa5 14.Ne2 Qa4 15.0–0 Qa3 16.Nf4 Qc3 17.g3 Ng5 18.Rac1 Nf3 19.Kh1 Qd2 20.Rfe1 Ne1 21.Re1 Qe1 (22.Kg2 Qa1–+) 0–1. Phunky – mrkt, ChessWorld.net, 2003.

4.Ne2 Bb4??

5.Bg7+– Be7 6.Bh8 Bf6 7.Bf6 Qf6 8.c3 Bg4 9.Qa4 c6 10.h3 Bh5 11.Qb4 b6 12.a4 Na6 13.Qb2 Nc5 14.g4 Nd3–+ 15.Kd1 Nb2 16.Kc2 Nd3 17.gh5 Nf2 18.Rg1 0–0–0 19.Na3 Ne7 20.Nd4 Nf5 21.Be2 Nd4 22.cd4 c5 23.Nb5 a6 24.Nc3 cd4 25.ed4 Qd4 26.Rg3 f5 27.Rag1 f4 28.Rg7?? e3 29.d3?? f3 30.R7g4 Ng4 31.Rg4 Qg4! 32.hg4 fe2 33.Ne2 Rg8 34.Nf4 Rg4 35.Nd5 Rg2 36.Kd1 Rd2 37.Ke1 Rd3 38.Nb6 Kb7 39.Nc4 Rc3 40.Nd6 Kb6 0–1. bratek55 (1670) – j1a9n55, kurnik, 2011.

5.Bg7+– Bg4 6.Bh8 Nh6 7.Bb2 Nc6 8.h3 Qh4 9.Nbc3 0–0–0 10.g3 Qh5 11.a3 Bc3 12.Bc3 Bf3 13.Rg1 a6 14.Bg2 Bg2 15.Rg2 Qh3 16.Rg1 Ng4 17.Nf4 Qh2 18.Rf1 f5 19.Qe2 h5 20.0–0–0 b5 21.Ne6 Re8 22.Nf4 Kb7?? 23.Nd5+– Rd8 24.Nf4 a5 25.d4 Kb6 26.d5 Ne7 27.Bd4 Ka6 28.a4 Rb8 29.ab5 Rb5 30.c4 Rb4 31.Bc5 Ra4 32.Be7 Ra1 33.Kb2 Rd1 34.c5 (34.c5 Ka7 35.Qd1 Nf2 36.Qb3 Nd3 37.Kb1+–) 1–0. bratek55 (1740) – wieslaw60, kurnik, 2011.

4.Ne2 f5

5.Nf4 Nf6 6.a3 a5 7.b5 c5 8.c4 d4 9.d3 b6 10.Nd2 Bd6 11.ed4?? Bf4–+ 12.g3 Bd2 13.Qd2 cd4 14.Bg2 0–0 15.0–0 Bb7 16.a4 e3! 17.Qe2? Bg2 18.Kg2 Re8 19.Qf3 Ra7 20.Qf5 Rf7 21.Qg5 Qd6 22.f4 Nbd7 23.Ba3 Nc5 24.Rae1 Nfd7 25.h4 h6 26.Qg4 Qe6 27.Qe2 Qf5 28.Bb2 Na4 29.Bd4 Ndc5 30.g4 Qd3 31.Qd3 Nd3 32.Re3 Re3 33.Be3 Nac5 34.Rd1 a4 35.Bc5 Nc5 36.f5 Ra7 37.Ra1 a3 38.Ra2 Ra4 39.g5 Rc4 40.Ra3 Rh4 41.g6 Kf8 42.Ra8 Ke7 43.Ra7 Kf6 44.Rf7 Ke5 45.Rg7 Kf5 46.Rg8 Rg4 47.Kf3 Rg6 48.Rb8 Kg5 49.Rc8 h5 50.Rc7 h4 51.Rc6 h3 52.Kg3 Kf5 53.Kh3 Rc6 54.bc6 Ne6 55.Kg3 Ke4 56.Kf2 b5 57.Ke2 Kd4 58.Kd2 Kc5 59.c7 Nc7 60.Kc3 Nd5 61.Kb3 b4 62.Kb2 Kc4 63.Kc1 Ne3 64.Kb2 b3 65.Ka1 Kc3–+ 66.Kb1 Nc4 67.Kc1 b2 68.Kd1 b1Q 69.Ke2 Qd3 70.Kf2 Kd2 71.Kg2 Qe3 72.Kh2 ½–½. bratek55 (1650) – paul49 (1610), kurnik, 2011.

5.Ng3 Nf6 6.a3 Be6 7.d3 Bd6 8.Nd2 Bg3 9.hg3 Nbd7 10.Be2 Qe7 11.Bh5 g6 12.Be2 0–0–0= 13.d4 b6 14.c4 dc4 15.Bc4 Bc4 16.Nc4 Nd5 17.Qa4 Kb7 18.b5 h5 19.Ke2 Rhf8 20.Qa6 Kb8 21.a4?? Nc5?? 22.dc5 Qc5 23.Nb6?? ab6 24.Rac1? Qb4–+ 25.Be5 Rfe8?? 26.Bc7!+– Nc7 27.Qb6 Ka8 28.Qc6 Kb8 29.Qc7 Ka8 30.Qc6 Kb8 31.Rhd1 Rd1 32.Rd1 Rc8+– 33.Qb6 Ka8 34.Rd2 Qc4 35.Ke1 Qc1 36.Rd1 Qc3 37.Kf1 Qc7 (37...Qc7 38.Qa6 Kb8 39.Qg6 Rd8 40.Rd8 Qd8 41.Qh5 Qd2 42.Qh8 Kb7+–). bratek55 (1630) – mdmarek, kurnik, 2011.

4.Ne2 Nf6

5.a3 a5 6.b5 c6 7.a4 c5 8.c4 b6 9.cd5 Nd5 10.Ng3 f5 11.Bc4 Be6 12.0–0 Nd7 13.Qb3 N7f6 14.Nc3 Nc3? 15.Bc3 Bc4+/– 16.Qc4 Qd7 17.f3 Be7? 18.fe4+– fe4 19.Nf5 0–0–0 20.Rf4 Nd5?? 21.Ne7 Ne7+/– 22.Rf7 Rhf8 23.Raf1 Rf7+/– 24.Rf7 Qe8?? 25.Qe6+– Rd7 26.Rg7 Kc7 27.Be5 Kb7 28.Rh7 Ka7 29.Bf6 Rb7 30.Re7 Qh5 31.Rb7 Kb7 32.Qe4 Kc7 33.Be5 Kd7 34.Qc6 Ke7 35.Qf6 Kd7 36.Qf3 Qe5 37.g4 Qa1 38.Kf2 Qa4 39.Qf5 Kc7 40.Qf4 Qf4–+ 41.ef4 a4 42.g5 a3?? 43.g6+/– a2 44.g7 a1Q 45.g8Q (45.g8Q Qd4 46.Kf3 Qd3 47.Kg4 Qb5 48.Qf7 Kd6 49.Kg5+/–) 1–0. bratek55 (1645) – nicu525 (1620), kurnik, 2011.

5.a3 a6 6.Ng3 Nc6 7.d3 Bd6 8.Nd2 0–0 9.Be2 h6 10.0–0 Ne5 11.de4+/– de4 12.Nde4 Ne4 13.Ne4 Qh4 14.Nd6 cd6 15.f4 Ng6? 16.Qd6 Be6?? 17.Bf3 Rad8 18.Qb6 Rd2 19.Rac1 Bh3? 20.Qb7 Bg4 21.Bg4 Qg4 22.Qf3 Qd7 23.Rfd1 Rd8 24.Bd4 Rd1 25.Rd1 Qf5 26.c4 Qc2 27.c5 Nh4 28.Qf1 Qe4? 29.Qf2 Nf5 30.Qf3?? Qc2? 31.Re1+– Nh4 32.Qe2 Qe4 33.Qf2 Nf5 34.Qf3?? Qc2?? 35.c6 Rc8? 36.Qe2 Qc6 37.g4 Nh4 38.Bb2?? Nf3–+ 39.Kf2 Ne1 40.Qe1 Qe4 41.Bd4?? Rc2 42.Qe2 Re2 43.Ke2 Qg2 44.Kd3 Qg4 45.a4 Qf5 46.Kd2 g5 47.b5 gf4 48.b6 fe3 49.Be3 Qd5 50.Ke2 a5 0–1. bratek55 (1690) – tomeklenart (1680), kurnik, 2011.

5.a3 b6 6.Ng3 c5 7.b5 Be6 8.Be2 Bd6 9.0–0 Nbd7 10.d3 0–0 11.de4 Ne4? 12.Ne4+– de4? 13.Qd6 1–0. bratek55 (1645) – yaniyanev, kurnik, 2011.

5.a3 c5 6.bc5 (6.Bf6 Qf6 7.Nbc3 Qe5 8.bc5 Bc5 9.d4=) 6...Bc5 (6...Nbd7 7.d4 ed3 8.cd3 Nc5 9.Nf4=) 7.Bf6 Qf6 8.Nbc3 Be6 (8...Qe5 9.d4=) 9.Nf4 Qe5 10.Qb1 Bb6 (10...b6!?=) 11.Nfd5 Bd5 (11...Qd5 12.Bb5) 12.Qb5 Nc6 13.Qd5 Qd5 14.Nd5 Ba5 15.Bb5 ½–½. Woschkat,Karl_Heinz – Wagner,Christian, IECG, 1998.

5.a3 Bd6 6.Nd4 Nc6 7.Nc6 bc6 8.Be2 c5 9.0–0 0–0 10.d3 Ba6 11.de4 Be2 12.Qe2 de4 13.Nc3 cb4 14.ab4 Bb4 15.Ra4 Bc3 16.Bc3 Nd5 17.Bd4 c5 18.Bb2 Rb8 19.Ba1 Re8 20.Rd1 Qg5 21.Qc4?? Nb6–+ 22.Qa6 Na4 23.Qa4 Rb4 24.Qe8# 1–0. TriAngel – Slim_Jim, ICC, 1999.

5.a3 Be6 6.Nf4 Bd6 7.Ne6 fe6 8.g3 0–0 9.Bh3 Qe7 10.0–0 e5 11.d3 ed3 12.cd3 Nbd7 13.Qb3 Kh8 14.Nd2 c6 15.f4 ef4 16.ef4 Qe3 17.Rf2 c5?? 18.Nf1?? Qe7= 19.Bg2 a5 20.ba5 c4 21.dc4 Bc5–/+ 22.cd5? Bf2?? 23.Kf2= Qc5 24.Kf3 Nd5 25.Rc1 Qd6 26.Kf2 N7f6 27.Rd1 Rad8?? 28.Ne3 Qc5 29.Bd4 Qc6 30.Nd5 Nd5 31.Bg7! Kg7 32.Bd5 Qc5 33.Kg2 Rf5 34.Be4 Rd1 35.Qd1 Rf7 36.Qg4 Kf8 37.Kh3 Qe7? 38.Qc8?? Kg7+/– 39.Qc3 Qf6 40.Qf6 Rf6? 41.Bb7 Rf7 42.a6 h6 43.a7 Rb7 44.a8Q Rb5 45.Qa7 Kg6 46.Qd7 (46.Qd7 Rf5 47.Qd3+–) 1–0. bratek55 – shrek1975, kurnik, 2011.

5.b5 (--> 1.b4 e5 2.Bb2 e4 3.e3 Nf6 4.b5 d5 5.Ne2).

5.d3 Bb4–/+ 6.c3 Be7 7.de4 de4 8.Ba3 (8.Qd8 Bd8 9.Nd2 Nbd7–/+) 8...Qd1–+ 9.Bd1 Nc6 10.Ba4 Ba3 11.Bc6 bc6 12.Na3 0–0 (12...Rb8 13.Ne2–/+) 13.Ne2 Ba6 14.Nd4 c5 15.Nb3 Nd7 16.c4 Rab8 17.Na5 (17.0–0–0 Rfd8=+) 17...Rb6 (17...Ne5 18.Nb3 Nc4 19.Nb1–+) 18.0–0 (18.Nb3 f5–/+) 18...Nb8 (better is 18...Ne5!?–+) 19.Rfd1 Rd6 (19...Rb4 20.Nb3 Bc4 21.Nc5=+) 20.Rd5 Rfd8 21.Rd6 Rd6 22.Rb1 Nd7–/+ 23.Nb5 Bb5 24.cb5 a6 25.ba6 Ra6–/+ 26.Nb7 Rb6 27.Rb6=+ cb6 28.a4 Kf8 29.f3? ef3 30.gf3 Ke7 31.f4 f5 32.Kg2 Ke6 33.Kg3 Kd5 34.Kf3 c4 35.Ke2 Nc5 36.a5 ba5 37.Na5 Nb3 38.Nb7 Nc5?? 39.Nc5?? Kc5–+ 40.Kd2 Kd5 41.Kc3 h6 42.h4 Ke4 43.Kc4 Ke3 44.Kd5 Kf4 45.Ke6 Kg4 46.Ke5 f4 47.h5 f3 48.Ke4 Kg3 (49.Kf5 f2–+) 0–1. pinecrest1981 – adr, Live Game Caissa's Web, 2004.

4.Ne2 Bg4

5.h3 Bh5 6.g4 Bg6 7.Nf4 Bd6?? 8.Bg7+– Nf6 9.Bh8 Be5 10.Nc3 Nbd7 11.Bf6 Qf6 12.Nfd5 Qd6 13.Bc4 0–0–0 14.Qe2 Nb6 15.Nb6 ab6 16.0–0–0 Qb4 17.Bb3 Bc3 18.dc3 Rd1 19.Qd1 Qc3 20.Kb1 f5 21.Qd4 Qa5 22.Rd1 Kb8 23.Qd8 Ka7 24.Qc7 h5 25.Qd6 Be8 26.g5 Ba4 27.Qd2 Qb5 28.g6 Bb3 29.ab3 Qe5 30.Qd4 Qe7 31.Kb2 Qf8 32.g7 Qg8 33.Ra1 Kb8 34.Ra4 h4 35.Rc4 f4 36.ef4 b5+– 37.Qe5 Ka8 38.Re4 Ka7 39.Qe7 Ka6 40.Re6 Ka5 41.Qa3 1–0. bratek55 (1655) – vitovcik, kurnik, 2011.

5.h3 Bh5 6.g4 Bg6 7.Nf4 Be7 8.h4?? (better is 8.Bg7 Bf6 9.Bh8 Bh8 10.c3 (10.Nc3+– Ne7 11.h4 h6 12.Rc1+–) 10...Be5 11.h4 Bf4 12.ef4+–) 8...f6+= 9.Ng6 hg6 10.h5 (10.a3!?=) 10...gh5+= 11.gh5 Nh6 12.Bh3 (better is 12.d3!?=) 12...Bb4–/+ 13.Rg1 Qe7 14.c3 Bd6 15.c4 dc4 16.Qa4 Nc6 17.Qc4 Ne5?? (better is 17...Nb4 18.Bf1 0–0–0–/+) 18.Qb5?? (better is 18.Qe4 c6 19.f4+=) 18...c6–+ 19.Qb3 Nf3 20.Kf1 Ng1 21.Kg1 Nf7 22.Nc3 (22.Bg4 Ne5 23.Bf5 Nf3 24.Kf1 Nh4–+) 22...Ng5 (better is 22...f5–+) 23.Na4 (23.Bg4 f5! 24.f4 fg4 25.fg5 Qe5–+) 23...Nf3 (better is 23...Nh3 24.Kf1–+) 24.Kg2 Qe5 (24...Nd2 25.Qd1 Nf3 26.Bg4–+) 25.Qe6 (better is 25.Be5 Be5 26.Qb7+–) 25...Qe6–+ 26.Be6 Nh4 (26...Rh5 27.Rd1 Ke7 28.Bb3–+) 27.Kh3 (27.Kf1 Rh5 28.Rd1 Nf3–+) 27...Rh5 28.Bg4 (28.Rd1 f5 29.d3 Ke7 30.Bf5 Nf5 31.Kg4 g6 32.de4 Nh6 33.Kf3 Rf8 34.Ke2 Rh2–+) 28...Rh8 (28...Rh7 29.Be2–+) 29.Nc3 (29.Be2 Ke7 30.d3 Nf5 31.Kg2 Rh2 32.Kf1 Bg3 33.Ba3 Kf7 34.de4 Rf2 35.Kg1 Ne3 36.Bh5 g6–+) 29...Nf3 (better is 29...f5!? 30.Be2 0–0–0 31.d3 ed3 32.Bd3–+) 30.Kg2 Nd2 31.Ne2 (31.Rd1 Rh2 32.Kg1 Rh4 33.Bh5 Rh5 34.Rd2 Bh2 35.Kg2 f5–+) 31...Rh2 32.Kg1 Kf7 (better is 32...Rh4!? 33.Bf5 Nf3 34.Kf1 Rh1 35.Ng1 Rg1 36.Ke2 Ra1 37.Ba1–+) 33.Nf4 Nf3 (better is 33...Rah8–+) 34.Bf3 Bf4 35.ef4 Rah8 (35...ef3?! 36.Kh2 Rd8 37.Bc1=) 36.Kf1?? (better is 36.Be4 R2h4 37.Rd1 Rf4 38.Bc2–/+) 36...ef3 37.Ke1 Rh1 (37...Rd8 38.Bd4 Rd4 39.Rd1 Rh1) 38.Kd2–+ Ra1 39.Ba1 Rh2 (better is 39...Re8!? 40.Bd4 Re2 41.Kc3–+) 40.Ke3 Ke6 41.Kf3 (41.Bb2 Rh3–+) 41...g5 (better is 41...Rh3 42.Ke4 Ra3 43.f5 Kd6 44.Bb2 Ra2 45.Bc1 Rf2 46.Ba3 c5 47.Bc1–+) 42.fg5 fg5 43.Bb2 Rh7 44.Bc1 Kf5 45.Be3 g4 46.Ke2. Nautiluschess – ovc, ICS blitz, 2001.

4.f3 Nf6

5.a3 c5 6.bc5 Bc5 7.Bb5 Bd7 8.Nc3 a6 (8...Nc6 9.Rb1=+) 9.Bd7 Qd7 (9...Nbd7 10.Nge2=+) 10.Nce2 Be7 11.Rb1 0–0 12.Ng3 Nc6 13.Bf6 Bf6 14.fe4 de4 15.Ne4 Be7 16.Nf3 Ba3 17.0–0 b5 18.Rb3 (18.Qe2 Rae8 19.Nf2 Nd4 20.Nd4 Qd4=) 18...Be7 (18...f5 19.Nf6 (< 19.Ra3 fe4 20.Ng5 Rf1 21.Qf1 Qd5–/+) 19...Rf6 20.Ra3=) 19.Qb1 (19.Qa1 Qe6 20.Nf2 Bf6=) 19...Qe6 20.Nf2 Ne5 21.Ne5 Qe5 22.Nd3 Qe4 (22...Qh5 23.Nf4 Qh4 24.Rf3=) 23.Rf4 (23.Qd1 Bd6=) 23...Qc6 (23...Qe6 24.Qd1=+) 24.Qb2 Bf6 25.Qb1 Rac8 26.Nb4= Qb7 27.Rf3 Rc5 28.Qa2 Ra8 29.Ra3 Be7?? 30.Qf7+– Kh8 31.Ra6!! Rac8 32.Re6 R5c7 33.Re7! 1–0. Trkn – guest5255, ICC, 2005.

5.a3 Bd6 6.Nc3 0–0 7.Nb5 Be7 8.Be5 Nbd7?? (better is 8...Ne8+=) 9.Bc7+– (9.Nc7? Ne5 10.Na8 Be6–+) 9...Qe8 10.Nd6 Bd6 11.Bd6 Ne5 12.Bf8 Kf8 13.f4 Bg4 14.Be2 Be2 15.Ne2 (15.Ke2?! Nc4+/–) 15...Rc8?? (better is 15...Nc4+–) 16.fe5 Qe5 17.Nd4 (17.Nd4 h5 18.0–0+–) 1–0. marre (1835) – zulu (1665), GameColony.com, 2003. (=1.f3 d5 2.b4 e5 3.Bb2 e4 4.e3 Nf6)

5.b5 Nbd7 =.

5.b5 ef3 6.Nf3 c6 7.a4 cb5 8.ab5 Bg4 9.Be2 Bf3 10.Bf3 Be7 11.0–0 0–0 12.d4 a6 13.Nd2 Nbd7 14.c4 ab5 15.c5 Ra1 16.Qa1 b6 17.c6 Nb8 18.Rc1 Qc7 19.e4 de4 20.Ne4 Ne4 21.Be4 Bd6 22.d5 Bh2 23.Kh1 Bd6 24.Bg7 Re8 25.Bf3 Be5?? 26.Be5+– Re5 27.Re1 Re1 28.Qe1 Qd8?? 29.Qe5 Na6 30.d6 Nc5 31.c7 Qd7 32.Qe7! (32.Qe7 Qf5 33.Qe8 Kg7 34.c8Q Qc8 35.Qc8+–) 1–0. bashful – Okafor, Live Game Caissa's Web, 2004.

5.b5 ef3 6.Nf3 Bg4 7.Be2 Nbd7 8.d3 Bd6 9.Nbd2 Qe7 10.0–0 Qe3 11.Kh1 0–0–0 12.Bf6 Nf6–+ 13.h3?? Bh5 14.Re1 Bg3 15.Rf1?? Rhe8 16.Nd4 Be2 17.Ne2 Qe2 18.Qe2 Re2 19.Nf3 h6 20.Rac1 Rde8 21.Nd4 R2e7 22.Nf5 Re3 23.Ng3?? Rg3 24.Rce1 Re1 25.Re1 Kd7 26.Kh2 Rg5 27.Re2 Kd6 28.c4 d4 29.a4 Re5 30.Re5 Ke5 31.g4 Kf4 32.Kg2 Ke3 (32...Ke3 33.c5 Kd3–+) 0–1. chevin – Falcon8, Live Game Caissa's Web, 2004.

5.Bf6–/+ gf6 6.fe4 de4 7.Nc3 =.

5.Bf6-/+ Qf6 6.Nc3 Bd6= (6...c6!? 7.fe4 Bb4+=) 7.Nd5 (7.fe4? Qh4 8.Ke2 de4–+) 7...Qh4 8.g3 Bg3 9.hg3 Qh1 10.Nc7 Kd8 11.Na8 Qg1 12.Qe2 (12.fe4?? Qg3 13.Ke2 Bg4 14.Kd3 Bd1 15.Rd1 Ke7–+) 12...Qg3 13.Qf2 Qf2 14.Kf2 b6 15.fe4 Bb7 16.Nb6 ab6 17.Bd3 h5 18.Rg1 g6 19.Rf1 h4 20.Kg1 Ke7 21.Bc4 f6 (21...Be4 22.Rf7 Kd8 23.d3-/+) 22.Bd5 Bd5 23.ed5 Rc8 24.c3 Nd7 25.a4 Kd6 26.e4 (26.a5 ba5 27.ba5 Kd5–+) 26...Ke5 27.Re1 Ra8 28.d4 (28.Kg2 Kf4–+) 28...Kf4 29.e5 fe5 (29...Ra4 30.e6 Ra8 31.ed7+/-) 30.Rf1 Kg3 31.Ra1 ed4 (31...ed4 32.cd4 Nf6–+) 0–1. Gross,Gerald – Luzuriaga,Norberto Horacio, email SOK–99–134, 1999.

3.e3 f5

4.b5 a6 5.a4 Nh6 (5...Nf6 6.Ne2=) 6.d3 d5 7.de4 de4 8.Qd8 Kd8 9.c4 Rg8 10.Nc3 Nd7 11.Rd1 Bd6 12.Nge2 Nc5 13.Nd4 Nf7 14.Be2 g5 (14...Ne5 15.0–0+=) 15.g3 (15.0–0!?=) 15...Ne5+= 16.f4? (16.0–0 Ncd3 17.Ba1 g4+=) 16...Ned3 (16...gf4!? 17.ef4 Ncd3 18.Bd3 Nd3 (18...ed3?? 19.fe5 Re8 20.Rd3+–) 19.Rd3 ed3+=) 17.Bd3-/+ Nd3 (17...ed3 18.fg5 Bd7 19.Ba3 Na4 20.Na4 Ba3 21.Nc3 ab5 22.cb5-/+) 18.Rd3 ed3 19.Kd2 ab5 20.ab5 gf4 21.ef4 Bf4 (better is 21...h5!? 22.Kd3 h4+=) 22.gf4+= Rg2 23.Kc1 c6 24.bc6 bc6 25.Nc6 Kc7 26.Ne5 d2 27.Kd1 Ba6?? (27...Bb7 28.Nb5 Kd8 29.Nd4+=) 28.h4?? (better is 28.Nd5 Kb8 29.Ne3+–) 28...Rd8 29.Nd5 Kb7?? 30.Bc3 Bc4 31.Nc4+– Rd5 32.Ne3 Rd3? 33.Ng2 Rc3 34.Kd2 Ra3 35.Rb1 Kc6 36.Ne3 Kc5 37.Rc1 Kd4 38.Nf5 Ke4+– ½–½. Fournier,Frederic – Chalvet,Philippe, Partie Libre (Active), 1996.

4.b5 d5 5.c4 c6 6.a4 Nf6 7.Na3 (7.Ne2 Bd6=) 7...g6 (7...Bd6!?+=) 8.cd5 cd5 9.Ne2 (9.Nh3 Qd6=) 9...Bc5 (9...Qd6 10.h4=) 10.Rc1+= Be7 (better is 10...Nbd7!?+=) 11.Nf4+/- 0–0 12.Bf6 Bf6 13.Nd5! Be5?? (13...Qd5 14.Bc4 Decoy) 14.Rc8! Qd5 (14...Qc8 15.Ne7 Double attack (15.Ne7 Decoy)) 15.Bc4 (15.Bc4 Qc4 16.Rf8 Kf8 17.Nc4+–) 1–0. Roos – White, email CTON, 1996.

4.b5 Nf6 5.d3 d5 (5...Bb4 6.Nd2+=) 6.c4 (6.de4 fe4 7.c4 Bg4=) 6...Bb4 (6...dc4 7.dc4 Qd1 8.Kd1+=) 7.Nd2 (7.Bc3 Be7=) 7...0–0 (7...dc4 8.dc4 0–0 9.Ne2+=) 8.cd5 Nd5 9.de4 (9.a3 Ba5+=) 9...fe4 10.Bc4 c6 11.Ne2 (11.a3 Qg5 12.Nh3 A) 12...Qg2 13.Rg1 Rf2 14.Rg2 (14.Nf2? Qg1 15.Ke2 Bg4 16.Ng4 Qg4 17.Kf2 Qh4 18.Kg1 Bd6–+; 14.ab4?! Qh3 15.Bd5 cd5 16.Rg7 Kf8 17.Kf2 Qh2 18.Rg2 Qh4 19.Kg1 Be6+–) 14...Rg2 15.ab4 Bh3 16.Qh5 Rg1 17.Nf1+–; B) 12...Bh3 13.gh3 Ba5–/+) 11...Kh8 (11...cb5 12.Bb3 Be6 13.0–0 Bd2 14.Nd4=) 12.Bd5 (12.a3 Ba5=) 12...cd5+= 13.0–0 Bd2 (better is 13...Qa5!? 14.Nb3 Qb5+=) 14.Qd2+= a6 15.a4 (15.Nf4 ab5 16.Qd5 Qd5 17.Nd5 Rd8+/–) 15...Qg5 (15...Be6 16.Nf4 Qd7 17.Qd4+/–) 16.Nf4+/– h5 (16...Rf5!?+/–) 17.Qd5 (17.Nd5?! Bh3 18.f3 ef3+=) 17...Qd5 18.Nd5 h4?? (18...ab5 19.ab5 Ra1 20.Ra1+–) 19.Ne7 (better is 19.Nc7 ab5 20.Na8+–) 19...Kh7 (19...Re8 20.Rfc1 Bd7 21.Nd5 ab5 22.Nc7+–) 20.Rfc1 Nd7? (20...Bd7 21.Rc5 Bg4 22.Re5 ab5 23.Re4+–) 21.Rc4 (21.Rc7 b6 22.Nc8 Rfc8 23.Rd7 ab5 24.Rg7 Kh6+–) 21...ab5 (21...Re8 22.Re4 (22.Rc8?! Rec8 23.Nc8 Rc8+/–; 22.Nc8?! Rac8 23.Rac1 Rc4 24.Rc4 Nb6+/–) 22...g5 23.Rc1+–) 22.Re4 (22.ab5 Ra1 23.Ba1 Nb6 24.Re4 g5+–) 22...g5 23.ab5 (23.Nc8 Rfc8 24.Re7 Kg6 25.Rd7 Rc2 26.Rd6 Kf7+–) 23...Ra1 24.Ba1 Re8 25.f3 (25.Bd4 b6+–) 25...Nc5 26.Re5 (26.Rc4 Re7 27.Rc5 Re3+–) 26...Ne6? (better is 26...Nd7 27.Rg5 Re7+–) 27.Nc8+– Rc8. GuestVKZB – GuestPJKY, freechess.org, 2016.

4.c4 Bb4?? 5.Bg7 Qe7 6.Qh5 Kd8 7.Bh8 Nf6 (7...d6 8.Nh3+–) 8.Qf5 Ne8 9.Nc3 c6 10.Qe4 d5 (10...d6 11.a3 Ba5 12.Bd3+–) 11.Qe7 Ke7 12.cd5 cd5 (12...Bc3 13.dc3 cd5+–) 13.Nd5 Kf7 14.Nb4 Be6 15.Nf3 Nd7 16.Ng5 Ke7 17.Nh7 Nd6 18.Bd4 Nf5 19.Bb2 (19.Bc3 a5 20.Nd3 b5+–) 19...a5 20.Nd3 Nb6 21.Nf4 (21.Ba3 Kd8+–) 21...Bg8 22.Nf6 Bf7 23.h4 (23.Rb1 Nd7 24.N4d5 Bd5 25.Nd5 Kf7+–) 23...Rd8 24.g4 Nd6 25.g5 Ndc4 26.Bc1 (better is 26.Bd4 Na4+–) 26...Ne5 27.Ba3 Rd6 28.Rb1 Nf3 29.Ke2 Nd2 30.Bd6 Kd6 31.Rb6 Kc5 32.Nd7 Kc4 33.Kd2 1–0. pereira – mngbobo, chesshere.com, 2007.

4.c4 Be7?? 5.Bg7+– (5.Bg7 Nf6 6.Bh8 Bb4 7.Ne2+–) 1–0. Fournier,Frederic – ocwal, Active (5/0), 2004.

4.c4 Ne7 5.Qh5+= Ng6 (5...g6!? 6.Qh4 Rg8+/-) 6.Qf5+/- Nc6 (6...Qh4!?+/-) 7.Qe4+– Nge7 (7...Qe7 8.Qe7 Nge7 9.b5+–) 8.b5 Nb4 9.a3 (9.c5!? a5 10.a3 Nbd5+–) 9...d5 10.cd5 Nbd5 11.g4 (11.Qe5 Nf6+–) 11...Bd7 (11...a6 12.ba6 ba6 13.Bg2+–) 12.Nc3 c6 13.Nd5 cd5 14.Qd4 b6 (14...h5 15.g5+–) 15.Rc1 Be6 (15...Rc8 16.Rc8 Qc8 17.h3+–) 16.Nf3 Rc8 (16...h5 17.g5+–) 17.Rc8 Qc8 (17...Nc8 18.Qe5 Qd6 19.h3+–) 18.Bd3 (18.Ne5!? h5+–) 18...Bg4 19.Ne5 Be6 (19...Bf5 20.Bf5 Qf5 21.d3+–) 20.Ke2 (20.Qh4 h6+–) 20...Qb7 (20...Bf5 21.Bf5 Qf5 22.Rc1 Qh5 23.Qg4 Qg4 24.Ng4+–) 21.f4 (better is 21.Rc1+–) 21...g6? (better is 21...Nf5 22.Qa4 Nd6+–) 22.Ng6! Rg8 (22...Ng6 23.Bg6) 23.Nf8 Rf8 24.Bh7 Bf5 (24...Qd7 25.Bd3+–) 25.Bf5 Rf5 26.a4 (26.a4 a6 27.Qh8 Rf8 28.Qh5 Kd7 29.Ba3 ab5 30.Be7 Ke7 31.Qe5 Kd8 32.Rg1+–) 1–0. Suess,Stefan – Leisner,Uffe, corr, 1985.

4.Ne2 Nf6 5.a3 Be7 6.d4 ed3 7.cd3 0–0 8.Nbc3 d6 (8...d5 9.Nd4=) 9.d4 (9.Nf4 c6+=) 9...c6 (9...a5 10.Nf4 c6 11.b5+=) 10.Qc2 (10.d5 Qb6+=) 10...d5= 11.Ng3 Ne4 12.Nge4 fe4 13.Be2 Bh4 14.g3 (better is 14.0–0=+) 14...Qf6?? (better is 14...Be7–/+) 15.0–0–0 (15.gh4 Qf2 16.Kd2 Bh3+/–) 15...Bg5 (15...a5!? 16.gh4 ab4 17.ab4 Qh4+=) 16.h4+/– Bh6 17.Rhf1?? a5 18.b5 Nd7 19.bc6 bc6–/+ 20.Qb3 Kh8 21.Na4 Ba6 22.Ba6 Ra6?? 23.Qb7+– Nb8 24.Nc5 Qd6?? 25.Na6 Na6 26.Qa6 Rb8 27.Rd2 g6 28.Bc3 Qa3 29.Bb2 Qb4 30.Qc6 Bf8 31.Qf6 Bg7 32.Qe6?? a4?? 33.h5?? a3?? 34.Ba3?? Qb1 0–1. Slavisa2 – han9, Live Game Caissa's Web, 2004.

4.f4 Bb4?? 5.Bg7 Qh4 6.g3 +–.

4.f4 Nc6 5.b5 Nb4 6.a3 Nd5 7.c4 Ndf6 8.d3 Ng4 9.Qe2 ed3 10.Qd3 d6 (10...N8f6 11.Nd2=+) 11.Be2 N4f6 12.Nf3 Be6 13.Ng5 Qe7 14.Bf3 0–0–0 15.Nd2 d5 16.c5 (better is 16.Qd4 Kb8 17.Qe5+/–) 16...d4? (better is 16...Ne4 17.c6 Ng5 18.cb7 Kb7 19.fg5 Qg5+/–) 17.Bd4+– Rd4? 18.Qd4 Nh6 19.Ne6 Qe6 20.0–0 Nfg4 21.Rfe1 Be7 22.Qg7 Rg8?? 23.Qh7 Ne3?? 24.Nc4 Qc4 25.Re3 Bc5–+ 26.Kf2?? Qc2 27.Be2 Ng4 28.Kf3?? Ne3 29.Qg8+– Kd7 30.Qf7 Be7?? 31.Ke3 Qe4 32.Kf2 Qf4 33.Bf3 Qd4 34.Kg3?? Qa1 35.Qf5+– Ke8 36.Bh5 Kd8+= 37.Qd5 Kc8?? 38.Qg8 Kd7+– 39.Bg4 Kd6 40.Qe6 Kc5 41.Qe7 Kb6 42.Qb4 (42…Qe5 43.Kf2 Qh2 44.Qd4 c5 45.bc6 Kc6 46.Bf3 Kc7 47.Qa7+–; better is 42.Bf3!? Qd4+–) 1–0. bashful – Replevin, Live Game Caissa's Web, 2004.

4.Nh3 Nf6 5.a3 d5 6.Nf4 Bd6 7.Nh5 0–0 8.Bf6 gf6 9.d4 Nd7 10.c4 c6 11.Nc3+/– a5 12.b5 dc4 13.Ne4 Nb6 14.Nd6 Qd6 15.bc6 bc6 16.Qf3 Kh8 17.Qg3 Qe7 18.Be2 Be6 19.0–0 Bd5 20.Qh4 Rg8 21.Nf4 Be4 22.g3 Rac8 23.Qh6 c5 24.dc5 Rc5 25.Bh5 c3 26.f3 Bd5 27.Ng6+= Rg6 28.Bg6 Nc4 29.Rf2 Qg7+= 30.Qg7 Kg7 31.Bf5 Ne3 32.Be4 c2 33.Rc1 Be4 34.fe4 Rc3 35.Re2 Rd3 36.Kf2 Ng4 37.Ke1 Ne3 38.Rd2 Ra3 39.Ke2 Ng4 40.Rcc2 Re3 41.Kf1 Re4 42.Ra2 Kg6 43.h3 Ne5 44.Rd5 Nc4 45.Kf2 h5 46.Ra4 f5 47.Rd7 h4 48.gh4 Rh4?? 49.Rc7 Rf4 50.Kg3 (50.Kg3 Rd4 51.Rac4 Rd3 52.Kf4+–) 1–0. lasker (2055) – ranzpendang (1725), internet, 2007.

4.a3 d5

5.d3 Nf6 6.de4 Ne4 7.Nf3 Bd6 8.Bg7+/- (8.Qd5?? Bb4 9.ab4 Qd5 10.Bg7 Rg8–+) 8...Rg8 9.Bb2 Be6 10.g3 Qe7 11.Nbd2 Nd7 12.c4 0–0–0? (12...Nd2 13.Nd2 dc4 14.Rc1+=) 13.cd5?? (better is 13.c5 Ndc5 14.bc5 Bc5 15.Nd4+–) 13...Bd5+= 14.Rc1?? (better is 14.Bc4 Nb6 15.Bd5 Nd5 16.Qb3 Nd2 17.Nd2+= (worse is 17.Qd5 Be5 18.Qd8 Rd8 19.Ne5 Qe6+=)) 14...Nd2–+ 15.Kd2 Ne5 16.Bg2?? (better is 16.Be5 Bb4 17.Ke2 Bf3 18.Kf3 Rd1 19.Rc7 Qc7 20.Bc7 Ba3 21.Be5–+) 16...Nf3 (better is 16...Bb4!? 17.Ke2 Bf3 18.Bf3 Rd1 19.Rhd1 Nf3 20.ab4 Qb4 21.Kf3 Qb2 22.Rc4–+) 17.Bf3 (17.Ke2 Qe4 18.Bf6 Bb4–+) 17...Bb4! 18.ab4 (18.Kc2 Be4 19.Be4 Qe4 (19...Rd1?! 20.Bf5 Rd7 21.Bd7 Kd7 22.ab4-/+; 19...fe4?! 20.Bd4 Ba3 21.Ra1–+) 20.Kb3 Rd1 21.Rhd1 Ba5–+) 18...Bb3 (better is 18...Qb4 19.Ke2 Bc4 (19...Qb2?! 20.Qc2 Bc4 21.Ke1 Qc2 22.Rc2–+) 20.Rc4 Qc4 21.Ke1 Qb4 22.Kf1 Rd1 23.Bd1 Qb2–+) 19.Ke1 (19.Bd4 Bd1 20.Rhd1 Qb4 21.Ke2–+) 19...Bd1 20.Bd1 Qb4 21.Bc3 Qe4 22.Rg1 (22.Rg1 Rd3 23.Bd2 Rd2 24.Kd2 Rd8 25.Ke2 Qd3 26.Kf3 Qd5 27.Kf4 Qe4 28.Kg5 Rg8 29.Kh5–+). Fournier,Frederic (1660) – irisrojo (1650), Active, 2006.

5.d3 Nf6 6.de4 Ne4 7.Nf3 h6 8.Ne5+/– Rg8 9.Qh5 g6 10.Ng6 Kd7?? 11.Ne5+– Kd6 12.Nf7 Ke7 13.Nd8 Kd8 14.Qf7 Bb4 15.ab4 Re8 16.Qd5 Nd6 17.Bf6 Kd7 18.Bd3 c6 19.Qd4 b5 20.Ra7 Ra7 21.Bf5 Kc7 22.Qa7 Nb7 23.Bh4 Bf5 24.Bg3 Kd8 25.Qb8 Bc8 26.Qc7# 1–0. nimwitzovich – xodinho, net–chess.com, 2002.

4.c4 d5

5.cd5 Qd5 6.Qh5 (better is 6.a3=) 6...g6?? (better is 6...Kd8=) 7.Qe2 (7.Qh3 Qc6 8.Na3 Qd7 9.Bh8 Bb4+–) 7...Bb4 (7...Nf6 8.Bf6 Rg8 9.a3+–) 8.Bh8 Bd7 (8...Nc6 9.Nc3 Qd6 10.f3+–) 9.Qc4 (9.Qc4 Qc4 10.Bc4+–) 1–0. Wall,Bill – Finlay, internet, 2004.

5.Qh5 g6 6.Qe2 Nf6 7.cd5 Bd6 8.b5 0–0 9.Qc4 Nbd7 10.d3 Nb6 11.Qc2 Bb4 12.Nd2 ed3 13.Bd3 Ne4 14.Ngf3 Nd2 15.Nd2 f4 (better is 15...Qd5!? 16.0–0 Be6+=) 16.e4+– f3 17.gf3 Rf3 18.Be2 Rf7 19.a3 Ba5 20.Bd3 (20.Bc3!? Bc3 21.Qc3 Qe7+–) 20...Qh4 Attacking the backward pawn on f2 (20...Qe7!?+=) 21.0–0–0+/– a6 22.ba6 ba6 (better is 22...Nd7+–) 23.Nb3?? (better is 23.Qc5 Bd2 24.Rd2+– (24.Kd2?? Rf2 25.Be2 Bg4–+)) 23...Qf4?? (better is 23...Rf2 24.Be2 Bg4 25.Na5 Re2+=) 24.Kb1+– Na4 25.Na5 Nb2 26.Qb2 Bg4 27.f3 (better is 27.Rc1 c5 28.dc6 Be6+–) 27...Qf3 (27...Bf3 28.Rhf1 Re8 29.Ka1+–) 28.Nc6 (28.Rhf1 Qd1 29.Rd1 Bd1+–) 28...Qe3 29.Rhe1 Qf4 (29...Qh3 30.Be2 Bf3+–) 30.Rf1 Qe3 (30...Bd1 31.Rf4 Rf4 32.Qd2+–) 31.Rf7 Bd1 (31...Kf7 32.Rf1 Bf5 33.Ne5 Kg8 34.ef5 Qb6+–) 32.Qg7 1–0. pierre – stesong, Yahoo, 2005.

5.Qh5 g6 6.Qe2 Nf6 7.cd5 Be7 +=.

4.c4 Nf6

5.a3 a6 6.Nc3 d5 7.Nd5 (7.d3 c6 8.Rc1 a5 9.b5 Be6 10.de4 de4 11.Qd8+=; 7.cd5 Nd5 8.d3 a5 9.ba5 ed3 10.Bd3 c6 11.Qc2+=) 7...Nd5 8.cd5 Qd5 9.Nh3 (9.Rc1 Nc6 10.Bc4 Qd6 11.Qh5+=) 9...h6 (9...a5!?+= 10.b5 c6 11.Nf4+/–) 10.Nf4+/– Qf7 11.Rc1 Nc6?? (better is 11...b5 12.Be2 Rg8+/–) 12.Bc4+– Qe7 13.Ng6 Qg5 14.Nh8 Qg2 15.Qh5 g6 16.Qg6 Qg6 17.Ng6 Bd7 (17...Bd6 18.d3 ed3 19.Kd2+–) 18.Nf8 Kf8 19.Rg1 Ke7 (19...Nd8+–) 20.Rg7 Kd6 21.Rg6 Ke7 22.Bf6 Kd6 23.Bh4 Ke5 24.Bb3 f4 (24...b6 25.Bf6 Kd6 26.Bg5 Be6 27.Bf4 Ke7 28.Re6 Kd8 29.Rh6 Rb8 30.Rcc6 Kd7 31.Rc7 Ke8 32.Rh8) 25.Rc5 1–0. pierre – Kenneth_Lacey, chesshere.com, 2008.

5.a3 d5 6.cd5 (White gets the initiative) 6...Nd5 7.d3 Nf6 8.Nc3 c5 (8...a5 9.b5+=) 9.bc5 Bc5 10.de4 Qd1 11.Rd1 0–0 (11...fe4!? 12.Nd5 Nd5 13.Rd5 Nd7+/–) 12.e5 Ne4 (12...Ne8 13.Nd5 b6 14.Nf3+–) 13.Bc4 Kh8 14.Ne4 fe4 15.Bd5 Nc6 (15...Nd7 16.Be4 Nb6 17.Rc1+–) 16.Be4 Be6 17.Nf3 Bc4 (17...Rad8+–) 18.Rc1 (18.Rc1 Na5 19.Nd2+–) 1–0. Elzerman – White, e–mail CTON, 1996.

5.a3 Be7 6.Nc3 0–0 7.d3 c5 8.bc5 Bc5 9.de4 fe4 10.Nd5 Nd5?? (better is 10...d6=) 11.Qd5+– Kh8 12.Qc5 d6 13.Qd4 Qe7 14.Rd1 Rd8 15.Ne2 Nc6 16.Qd5 Be6 17.Qe4 Qf7 18.Nf4 Bc4 (18...Bf5 19.Qd5 Kg8+–) 19.Bc4 Qc4 20.Qc4 Ne5 21.Be5 de5 22.Ng6! hg6 23.Qh4 Kg8 24.Rd8 Kf7 25.Rd7 Ke6 26.Qe7 Kf5 27.f3 Re8 (27...Rc8 28.g4#) 28.g4# 1–0. Janek – Emilia, internet, 2016.

5.Qb3 c5 6.b5 (6.bc5 Bc5 7.Nc3 Nc6=) 6...Be7 (6...a6 7.Nc3=) 7.Nh3 (7.Ne2 a6=) 7...b6 (7...d6 8.Be2=) 8.d4 (8.Be2=) 8...d5 (8...a6!?=) 9.cd5 Bb7 10.Nf4 Bd5 11.Nd5 Qd5 12.Bc4 Qd6 13.Ke2 (13.dc5!? Qc5 14.0–0+/–) 13...Nbd7 (13...cd4 14.Bd4 Nbd7 15.Nc3+=) 14.a4 (14.Nd2 cd4 15.Bf7 Kf8 16.ed4 g6+=) 14...cd4= 15.Bd4 (better is 15.Bf7 Kf8 16.ed4=) 15...Qb4 (better is 15...Ne5!?=) 16.Qb4 (16.Bf7 Kd8+/–) 16...Bb4 17.Be6 Rc8 18.Nd2 (18.Ra2!?+/–) 18...Rc2+= 19.Ra2 (19.Rhd1 Nc5 20.Bf5 Nd5 21.Bc5 bc5 22.Be4 Rd2 23.Rd2 Nc3 24.Kd3 Ne4+/–) 19...Ra2 20.Ba2 Ke7 ½–½. Troeger,Jochen – Wagner,Herbert, DDR–ch U18 Ruhla, 1957.

5.Qb3 d5 6.Nc3 d4 7.ed4 +=.

5.b5 Bb4 6.Qa4 Bc5 (6...Be7 7.Nc3=) 7.d4 Be7 8.Nh3 (8.Ne2 d5=) 8...d5 (8...a6 9.Be2=) 9.Nc3 Be6 (9...Bd6 10.c5 Be7 11.Nf4+=) 10.Nf4 Bf7 11.b6 (better is 11.cd5 Bd5 12.Ncd5 Nd5 13.Nd5 Qd5 14.Rc1+/–) 11...Qd7?? (better is 11...c6 12.Nfd5 Nd5 13.Nd5 Bd5 14.cd5 Qb6+=) 12.Qa7!+– Ra7 13.ba7 0–0 14.a8Q Nc6 (14...c5 15.Nfd5 Nd5 16.cd5 cd4 17.Bb5+–) 15.Qa4 (15.Qb7?! Rb8 16.Qa6 Rb2+–) 15...Bb4 16.cd5 (16.c5 Rb8+–) 16...Bc3 (16...Nd5 17.Nfd5 Bd5 18.Bb5+–) 17.Bc3 Ne7 (17...Nd5 18.Nd5 Bd5 19.Rb1+–) 18.Qd7 Nd7 19.Bb4 Re8 (19...Nd5 20.Nd5 Bd5 21.Bf8 Kf8 22.Rc1+–) 20.Bb5 (better is 20.Rc1 Nf6 21.Rc7 Ned5 22.Nd5 Nd5 23.Rb7 Nb4 24.Rb4 Ba2+–) 20...Nd5 (20...c6 21.dc6 Nc6 22.Bc6 bc6 23.a4+–) 21.Nd5 (better is 21.Bd7 Nf4 22.ef4 Rd8 23.Bf5 Rd5+–) 21...Bd5 (21...c6 22.Ne7 Re7 23.Bc6+–) 22.Bd7 Re7 1–0. pierred (2205) – Arnica, ICC, 2006.

5.b5 Bb4 6.Qb3 Ba5 7.Be2 0–0 (7...d6 8.Qa4 c6 9.Bc3=) 8.Nh3 (8.c5 Kh8=) 8...d5 9.cd5 (9.Nf4 dc4 10.Bc4 Kh8+=) 9...Qd5?? (better is 9...Nd5 10.Nf4 c6=) 10.Bc4+– (10.Bc4 Bd2 11.Nd2+–) 1–0. Welti – Merkl, corr SOK–90–62, 1990.

5.b5 Bb4 6.Ne2 0–0 7.Nbc3 a6 8.Qb3 Bc3 9.Bc3 ab5 10.cb5 Kh8 11.Nf4 c6 12.h4 d5 13.Rc1 c5 14.h5 b6 15.h6 g5 16.Nd5 Be6 17.Bc4 (17.Bc4 Bd5 18.Bd5+–; 17.Bf6 Rf6 18.Bc4 Bd5 19.Bd5 Ra7+–) 1–0. usingprogram (2015) – dojms (1610), kurnik, 2012.

5.b5 Bc5 6.d3 0–0 7.Nc3 Qe7=.

5.b5 Bc5 6.d3 0–0 7.d4 Bb6 (7...Bb4 8.Nc3=) 8.Nc3 (8.c5 Ba5 9.Bc3 Bc3 10.Nc3 d6=) 8...d5 (8...Ba5 9.Qa4 b6 10.Qb3=) 9.Nh3 c5 (better is 9...Ba5!?=) 10.dc5+/– Bc5 11.cd5 (11.Nd5 Ng4+/–) 11...Nbd7 12.Be2 (12.Nf4 Nb6+/–) 12...Ne5 (12...Nb6 13.Qb3+/–) 13.0–0 (13.Rc1 Bd6+/–) 13...Nfg4 (13...Qd6 14.Nf4+=) 14.Na4+/– Bd6 15.Nf4 Qh4 16.h3 g5 17.hg4 gf4 18.ef4 fg4?? (better is 18...Ng4 19.Bg4 fg4+=) 19.g3 (better is 19.fe5 Rf2 20.Rf2+– (20.ed6?? g3 21.Rf2 Qh2 22.Kf1 Qh1)) 19...Qh3 20.Be5 (20.fe5 Rf3 21.Qe1 e3=) 20...Be5 21.d6 (21.fe5?! Rf3=) 21...Bf4? (21...Ba1 22.d7 Bd7 23.Bc4 Kg7 24.Qd7 Kh8 25.Ra1 Rad8 26.Qb7 Rd4+–) 22.Qb3 (22.Qd5 Kg7 23.gf4 Bf5 24.Qe5 Kg6+–) 22...Kg7 23.gf4 Qb3 24.ab3 Rf4 (24...Bf5+–) 25.Nb6! Rb8 (25...ab6 26.Ra8 Pinning (26.Ra8 Deflection; 26.Ra8 Clearance)) 26.d7 Bd7 27.Nd7 Rd8 28.Nc5 Kf6 29.Ra7 b6 (29...Rd5 30.Nb7 Ke5 31.Bc4+–) 30.Nd7 Kg5 31.Nb6 h5 32.Nd7 Rf7 33.Rd1 e3 (33...Kf4 34.b6 e3 35.b7 ef2 36.Kf1+–) 34.fe3 Re7 35.Rd3 Rc8 (35...Kh4 36.b6 Rh8 37.b7+–) 36.b6 Rc1 (36...Ree8 37.Ra5 Kh4 38.b7+–) 37.Kg2 Rc2 38.b7 Re2 39.Kf1 Rb2 40.Ra5 Kh4 41.b8Q Rf7 42.Ke1 Rff2 43.Rh5! Kh5 (43...Kh5 44.Qh8 Mate attack) 44.Qh8 Kg5 (44...Kg6 45.Rd6 Kg5 46.Qh6 Kf5 47.Qg6) 45.Rd5 Kg6 46.Qh5 Kg7 47.Rg5 1–0. Janek – Asean, internet free game, 2017.

5.b5 Bc5 6.d3 0–0 7.Bf6 Qf6 8.d4 Bb4 9.Nd2 f4 10.Qb3 (10.Qe2 a6 (10...fe3 11.Qe3 a6 12.0–0–0 ab5 13.Ne4 Qg6 14.Nf3 Ra2 15.Kb1) 11.ef4 (11.Nh3 fe3 12.fe3 Qe7 13.g3 ab5 14.cb5 d5 15.a4) 11...Qd4 12.Rb1 c5 13.Qe3 Qe3 14.fe3 ab5 15.cb5; 10.c5 d5 (10...fe3 11.Qb3 d5 12.cd6 Be6 13.Qe3 cd6 14.Rb1 Ba5 15.Nh3; 10...Kh8 11.Qb3 fe3 12.Qe3 d5 13.cd6 cd6 14.Rc1 Nd7 15.Ne2) 11.cd6 fe3 12.Qb3 Be6 13.Qe3 cd6 14.Rb1 Ba5 15.Nh3) 10...Bd2 (better is 10...fe3 11.c5 (11.Qe3 a6 12.0–0–0 ab5 13.Ne4 Qg6 14.Kb1 c6 15.c5) 11...d5 12.cd6 Be6 13.Qe3 cd6 14.Nh3–+ (14.Rb1 Ba5 15.Nh3) 14...Bh3 15.gh3) 11.Kd2 fe3 (11...c5 12.Qc3 fe3 13.fe3 Qf2 14.Ne2 d6 15.dc5) 12.Qe3 c5 (12...a6 13.Qe4 d5 14.Qd5 Be6 15.Qe5) 13.Qe4 Qf2 (13...d5 14.Qd5 Be6 15.Qe4) 14.Be2 (14.Kc3 d6 15.Nf3) 14...Qd4 (14...Rf4 15.Qe8) 15.Qd4 cd4 16.Bf3 a6 17.Ne2 ab5 18.cb5 Ra4 19.Bd5 Kh8 20.Rhf1 Re8 21.Rae1 g6 22.Ng3 Rd8 23.Ne4 d6 24.Ng5 Kg7 25.Re7 Kh6 26.Nf7 1–0. Janek – Nello, internet free game, 2017.

5.b5 Bc5 6.d3 d5 7.d4 (7.cd5 Qd5 8.Bf6 gf6=) 7...Bd6 (7...Be7 8.Nh3+=) 8.Nc3= c6 9.Nh3 0–0 10.Qb3 h6 (better is 10...Qa5!?=) 11.cd5+/– cd5 12.Nd5 Be6? (better is 12...Nd5!? 13.Qd5 Kh7+/–) 13.Nf6+– Rf6 (13...Qf6?? 14.d5 Qe7 15.de6 Bb4 16.Bc3 Bc3 17.Qc3+–) 14.d5 Bf7 15.Bf6 Qf6 16.Rc1 Nd7 17.Nf4 (17.Bc4 Rc8+/–) 17...g5 (17...Nb6!?+/–) 18.Ne6+– Nb6 Black intends f4 19.Bc4 f4 (19...Rc8 20.0–0+–) 20.g3 (20.ef4!? Bf4 21.Nf4 Qf4+–) 20...f3 21.h4 Re8 (21...Rc8 22.hg5 hg5 23.Kd2+/–) 22.hg5 hg5 23.Kd2 (23.Kd1 Rc8+–) 23...Nd7 (23...Nd5 24.Bd5 Be6 25.Rh5 Bb4 26.Qb4 Bd5 27.Rch1+–) 24.Kc2 (24.Qb1 Qe5+–) 24...Be6 (24...Nb6 25.Kd1+–) 25.de6 Nc5 26.Qb2 Qb2 27.Kb2 Ne6? (27...Be5 28.Kb1 Kg7+–) 28.Rh6 Kf7 29.Rd1 Be5 30.Kb1 Bf6 31.Rd7 Re7 32.Rh7 Ke8 (32...Kg6 33.Rhe7 Be7 34.Be6+–) 33.Rde7 (33.Rde7 Be7 34.Be6+–) 1–0. Janek – Asen, internet free game, 2017.

5.b5 Bc5 6.d3 d6 7.Nd2=.

5.b5 c6 6.a4 d5+= 7.Nc3 Be6 8.cd5 cd5 (8...Bd5 9.Nge2=) 9.Nge2 Bd6 10.Nd4 Qe7 11.g3 (11.Be2 0–0=) 11...Nbd7+= 12.Be2 (12.a5 0–0+=) 12...0–0 (12...Ne5 13.d3+=) 13.0–0 Kh8 (13...Rac8 14.Rc1=) 14.f4 (14.a5 Nc5=) 14...Rfd8 (14...Bc5 15.Ne6 Qe6 16.Qb3+=) 15.a5= Bc5 (15...Rdc8 16.Rc1=) 16.Na4 Rdc8 (16...Bd4 17.Bd4 Rdc8 18.Nc3=) 17.Nc5 Nc5 (17...Rc5? 18.Ba3+– (18.Ne6?! Qe6 19.Bd4 Rc7+=)) 18.Ba3 (18.Rc1 Ncd7+=) 18...Qe8 (18...Qf7 19.Rc1 Nfd7 20.Rc3+=) 19.Rc1+= b6 20.Rc3 Nfd7 (20...Nb7 21.Rc8 Rc8 22.a6=) 21.Qc2+= Rc7 22.Rc1 Rac8 23.Nc6 Ra8 (23...Nb7 24.a6 (24.Na7?! Rc3 25.dc3 Ra8=) 24...Nbc5 25.Bb4=) 24.Bb4 Rcc8 (24...Qf7 25.Qd1+=) 25.Ra1 (25.Na7 Ra7 26.ab6 Nb6 27.Bc5 Rb7 28.Bb6 Rc3 29.Qc3 Rb6+–) 25...Rc7+= 26.Rca3 (26.Nd4 Rac8+=) 26...Rac8 27.Bc3 Bf7 28.Qb2 Qf8 29.Nd4 Bg6 30.ab6 ab6 Opening the a–file gets White a lot of play 31.Nc6 h6 32.Ra7 Kh7 33.Nb4 Bf7 34.Be5 Ne5= 35.Qe5 Ra7 36.Ra7+= Be6 37.Nd5 Bd5 38.Qd5 Rd8 39.Qa2 Qf6 40.Kf2 Nd3 (40...Kg6 41.Ra8+=) ½–½. Kreuzer – Frank, tt Verb–Liga, 1984.

5.b5 c6 6.a4 d5 7.cd5 cd5 8.Ne2 Bc5 9.Bd4 b6 (9...Nbd7 10.d3=) 10.Nbc3 0–0 11.Qb3 Bb7 (11...Bd4 12.Nd4 Rf7 13.Be2+=) 12.a5+= ba5?? (12...Bd4 13.Nd4 A) 13...ba5? 14.Ne6 (14.Nf5?! a6+=) 14...Qb6 15.Nf8 Kf8 16.Qa3 Kf7 17.Na4+–; B) 13...Rf7+=) 13.Bc5+– (13.Bc5 Rf7 14.Nf4+–) 1–0. Janek – Xivwu, internet, 2017.

5.b5 c6 6.a4 d5 7.Nh3 Be7 (7...Bd6 8.bc6 bc6 9.cd5 cd5 10.d3+=) 8.Nf4 0–0 9.Be2 Nbd7?? (better is 9...Bd6=) 10.Ne6+– Qe8 (10...Qa5!?+–) 11.Nc7 (11.Nf8?! Nf8 12.cd5 Nd5+/-) 11...Qf7? (11...Qg6 12.Na8 Qg2+–) 12.Na8 Bd6 (12...Nc5 13.Na3+–) 13.Ba3 (13.Qc2 Nc5 14.Bd4 b6+–) 13...Ba3 (13...c5 14.b6 Nb6 15.Nb6 ab6 16.Qb3+–) 14.Na3 Ne5 15.b6 Nd3 (15...Be6 16.Nc7+–) 16.Bd3 ed3 (16...Be6 17.Nc7 ed3 18.Ne6 Qe6 19.ba7+–) 17.ba7 f4 (17...b5 18.Nb6 Qa7 19.Nc8 Rc8 20.cb5+–) 18.0–0 (18.Nb6 fe3 19.a8Q ef2 20.Kf1 Bg4 21.Qf8 Qf8-/+) 18...Bh3 19.Qf3 (19.gh3 Ra8) 19...Bg4 (19...Bg2 20.Kg2 Qg6 21.Kh1 Ra8 22.cd5 Nd5 23.e4+–) 20.Qf4 Ra8 21.cd5 Qd5 (21...Qe8 22.dc6 bc6+–) 22.Qb8! Qd8 (22...Rb8 23.ab8Q) 23.Qb7 (23.Qd8 Rd8 24.Rfb1 Nd7 25.Rb7 Ra8+–) 23...Qc8 (23...Be6 24.Rab1 Nd7 25.Qc6+–) 24.Qc8 (better is 24.Rfb1!? Qb7 25.Rb7 Nd7+–) 24...Bc8 25.Rab1 Ra7 26.Rb8 Rc7 27.Nc4 Ne8 28.a5 Kf8 29.Ra1 Ba6 30.Nd6 Re7 31.Ne8 Re8 32.Re8 Ke8 33.Rb1 Ke7 34.Rb6 Bb5 35.a6 (35.a6 Ba6 36.Ra6+–; better is 35.Rb5 cb5 36.a6 Kd6+–) 1–0. Woelfelschneider,Peter – Jansky, Obernburg, 1983.

5.b5 c6 6.d3 Be7 =.

5.b5 d5 6.d4 ed3 7.Qd3 Bb4 8.Bc3 Bc3 9.Nc3 0–0 10.Nd5 c6 11.Nf6 Qf6 12.Qd4 cb5 13.Qf6 Rf6 14.cb5 Nd7 15.Rc1 Ne5 16.Rc5 Ng6 17.Nf3 Be6 18.Nd4 Ba2 19.Nf5?? (19.g3 b6 20.Rf5 Rf5 21.Nf5 Bd5+/–) 19...Rd8?? (better is 19...b6 20.Rc2 Bb1=) 20.Nd4+– b6 21.Rc7 Rf7 22.Rc2 Bd5 23.f4 Nh4 24.Nc6 Re8 25.Ne5 Rfe7 26.Rd2 Be4 27.Bc4 Kf8 28.Nd7 Rd7 29.Rd7 Ng2 (29...Rc8 30.Bf1+–) 30.Kd2 (30.Kf2 Rc8 31.Rc1 Nh4+–) 30...Bg6? (30...Ne3 31.Rc1 (31.Ke3?! Bf5 32.Kd4 Bd7=) 31...Nc4 32.Rc4+–) 31.Bd3 (31.f5!? Bh5 32.Be6 Nh4 33.Ra7 Nf3 34.Kd3 Ng5+–) 31...Re3 32.Bg6 hg6 33.Rg1 (33.Ra1!? Re4+–) 33...Nf4?? (33...Ra3+–) 34.Ke3 (34.Ke3 Nh5 35.Rg6+–) 1–0. pierre – stesong, Yahoo, 2005.

5.b5 d5 6.d4 Be6 7.c5= c6 8.Nh3 (8.Ne2 Be7 9.Nf4 Bf7 10.Nc3 0–0 11.Be2 cb5 12.Nb5) 8...cb5 (8...b6 9.Qc2= (9.Nf4 Qd7 10.Qc2 Be7 11.Be2 0–0 12.Nc3) 9...Bd7 10.Nf4 a6 11.a4 ab5 12.ab5; 8...Be7 9.Nf4 Bf7 10.Nc3 0–0 11.Be2 cb5 12.Nb5) 9.Bb5 (9.Nf4 Qd7= 10.Ne6 Qe6 11.Bb5 Nc6 12.Nc3) 9...Nc6 (9...Bd7 10.Be2= (10.Nc3 Bb5 11.Nb5 Qd7 12.Qb3) 10...Nc6 11.Nc3 b6 12.0–0) 10.0–0 (10.Nc3 Be7 11.0–0 0–0 12.Rb1) 10...Be7 11.Nf4 Bd7 (11...Qd7!?+= 12.Ne6; 11...Bf7 12.Nc3) 12.Nc3+/– Bc8 13.Qa4 g5 (13...Qd7 14.Qb3 a6 15.Ncd5 Nd5 16.Nd5 Bd8+–) 14.Nfd5! (worse is 14.Bc6 bc6 15.Nfd5 Bd7 16.Ne7 Qe7+–) 14...0–0 (14...Nd5 15.Bc6 Double attack (15.Bc6 Decoy)) 15.Bc6 bc6 16.Qc6 Bd7 17.Qa6 Bc8 18.Qc4 a5 (18...Be6 19.Nf6 Rf6+–) 19.Nb6 Kh8 (19...Kg7 20.Na8 f4 21.Nb6+–) 20.Na8 1–0. Janek – Asen, internet free game, 2017.

5.b5 d5 6.d4 Be6 7.c5 c6 8.Nh3 cb5 9.Bb5 Nc6 10.Nc3 (10.Nf4 Qd7+=) 10...a6 (10...Be7 11.Nf4 Qd7 12.Ne6 Qe6 13.Ne2=) 11.Be2 (11.Nf4 Bf7 12.Ba4 Rc8=) 11...Be7 (11...b6 12.Nf4 Bf7 13.cb6 Qb6 14.Qa4=) 12.Na4 0–0 (12...Qa5 13.Bc3 Qc7 14.Nf4+=) 13.Nb6 Rb8 14.0–0 (14.Nf4 Bf7 15.Qb3+=) 14...Nd7 (14...Bd6!?+=) 15.Nf4+/– Bf7 16.Nbd5 g5 (16...b6 17.Ne7 (worse is 17.Ba6 bc5 18.Ne7 Qe7+=) 17...Ne7 18.Ba3+/–) 17.Ne7 Ne7? (better is 17...Qe7 18.Nh5 Bd5+/–) 18.d5+– gf4?? (18...Nc6 19.dc6 bc6+–) 19.Qd4 1–0. Janek – Nease, internet, 2017.

5.b5 d5 6.cd5 Nd5 7.d4 (7.Qh5 g6 8.Qd1 Rg8=) 7...Bb4 8.Nd2 Qh4 9.g3 Qe7 10.a3 Bd6 11.Nc4 0–0 12.Bg2 Bb4 13.Nd2 Ba5 14.Ne2 Bd7 15.a4 Nb4 (15...Bb4!?-/+) 16.0–0= Nd3 (16...Nd5!?=) 17.Ba3+= Bb4 18.Bb4 Qb4 (18...Nb4 19.Nf4+=) 19.Rb1 Qe7 20.Nc1 (20.f3 Qg5 21.Nf4 Nf4 22.gf4 Qg6+/-) 20...Nc1+= 21.Rc1 c6 22.Qe2 g5 (22...Qb4 23.bc6 Bc6 24.Rc4=) 23.Qc4 (23.f3!? ef3 24.Nf3 cb5 25.Ne5+/-) 23...Be6= 24.Qc5 Qc5 25.Rc5 b6 (25...Nd7 26.Ne4 cb5 27.Rb5 fe4 28.Rg5 Kf7 29.Be4 h6+/-) 26.Re5+/- Rf6 27.Rc1 Nd7 28.Ne4! fe4 29.Rg5 Kf7 30.bc6 Rc8 31.Be4 h6 32.cd7?? (better is 32.Rb5 Ke7 33.Rcb1+–) 32...Rc1–+ 33.Kg2 Bd7 34.Bd5 Ke7 35.Rg7 Kd8 36.Rg8 Kc7 37.Ra8 a5 38.Ra7 Kd6 39.Rb7? Kd5 40.Rd7 Rd6 41.e4 Kc6 42.Rd6 Kd6 43.Kf3 Rc4 44.Ke3 Ra4 45.f4 Ra3 46.Ke2 b5 0–1. Kern – Vogler, Hessen simul, 1990.

5.b5 Be7+= 6.Nc3 0–0 7.Nh3 c6 (7...d6 8.Nf4+=) 8.a4 Bd6 (8...d5 9.Nf4+=) 9.Qb3 Bc7 (9...c5 10.d4=) 10.Be2 (10.c5 Kh8+=) 10...h6 (10...d5 11.Nf4=) 11.f4 (11.c5!? Kh7 12.0–0+=) 11...d5= 12.Nf2 (12.bc6 bc6 13.0–0 d4+=) 12...Be6 (12...d4 13.c5 Kh7 14.Ncd1+=) 13.0–0 Nh7 (13...d4 14.ed4 Bf4 15.Ba3+=) 14.Na2 (14.cd5 Bd5 15.Nd5 Qd5+–) 14...Nd7 (14...cb5 15.c5=) 15.Nb4 (15.bc6 bc6 16.d4 Rb8=) 15...Nb8 (15...Nc5 16.Qc3 Qf6 17.Qc2+/-) 16.Rfc1 (16.cd5 Bd5 17.Nd5 Qd5+–) 16...Nf6 (16...d4 17.bc6 bc6 18.Bd4+/-) 17.Bf6 (17.cd5 Bd5 18.Nd5 cd5 19.Bf6 Rf6+/-) 17...Rf6+= 18.cd5 cd5 19.Qb2 (19.d4 Ba5+=) 19...d4= 20.Bc4 Bc4 (20...Bb6 21.Be6 Re6 22.Qb3+=) 21.Rc4 Bb6 (21...de3 22.de3 Bb6 23.Rac1+=) 22.Qb3 (22.ed4 Rd6 23.Nc2 Qh4+/-) 22...Kh7= 23.Rd1 (23.Rac1 Qd6=) 23...d3 (23...a5 24.Nc2 d3 25.Nd4=) 24.Rdc1 White fights for the Initiative 24...Nd7 (24...Qd6 25.Rc8=) 25.Nd5 Rg6 26.Nb6 ab6 (26...Qb6 27.Rc7 Rd8 28.Qd5+–) 27.Rd4 (better is 27.Rc7+=) 27...Qe8? (better is 27...Rc8!? 28.Rc8 Qc8+=) 28.Qd5+– Nc5 29.Qf5 Nb3? (29...Qe6 30.Qe5 Nb3 31.Qe6 Re6=) 30.Rcc4?? (better is 30.Re4 Qg8 31.Rd1+–) 30...Nd4 31.Rd4 Qe6 (31...Rc8 32.Ne4 Rc1 33.Kf2 Rh1+–) 32.Qe4+– Qe4 33.Ne4 Re6 34.Nf2 Ree8 35.Nd3 Red8 36.Kf2 Rd4 37.ed4 The passed pawn on d4 quickly leads to threats 37...Ra4 38.Ke3 Ra5 39.d5 Kg8 40.Kd4 Rb5 41.Kc4 Rb1 42.d6 Kf7 43.f5 Ke8 44.Ne5 b5 45.Kd5 b4 46.Ke6 Re1+= 47.d7 Kd8 48.d4 Kc7?? 49.Ke7+– (49.Ke7 Re5 50.de5+–) 1–0. Berlacki,Piotr – Kitanovic,T, Paris op–B, 1996.

5.b5 Be7 6.Ne2 0–0 7.Nf4 g5 (7...a6 8.Qb3+=) 8.Ne2 (8.Nd5 Nd5 9.cd5 Bf6=) 8...d6 (8...d5 9.h4 g4 10.Nbc3=) 9.g3 (9.d4 d5=) 9...Nbd7 (9...d5+=) 10.Bg2 (10.Nd4!? Nc5 11.f4=) 10...Ne5–/+ 11.Be5 (11.0–0 Nc4 12.Bd4 Qe8–/+) 11...de5 12.0–0 (12.Qc2–/+) 12...Qe8 (12...Qd3!?–/+) 13.f4 (13.Qb3 Be6–/+) 13...ef4–/+ 14.ef4 (14.gf4 Qh5–/+) 14...Qh5 15.Nd4?? (better is 15.Qe1–/+) 15...Bc5 16.Qh5 Bd4 17.Kh1 Nh5 18.Nc3 e3 (better is 18...gf4!? 19.gf4 Be6 20.c5–+) 19.Bd5 (19.Rab1 Bc3 20.dc3 gf4 21.gf4 Re8–+) 19...Kg7 20.Rac1 (20.Rf3 gf4 21.Rd1 Bc3 22.dc3 e2–+) 20...ed2 21.Rc2 Bc3 (21...gf4 22.gf4 Be3 23.Nb1–+) 22.Rc3 Re8 (better is 22...gf4 23.Rd1–+) 23.Bg2 (23.Rd3 Re1 24.Kg1 gf4 25.gf4 Nf4 26.Rd2 Rf1 27.Kf1 a6–+) 23...Re1 (better is 23...gf4 24.Rd3 Be6 25.Rd2 Bc4 26.Rc1 Bb5 27.Rc7 Kg6 28.Bb7–+) 24.Rd3 Rf1 25.Bf1 Be6 (25...gf4 26.gf4 a6 27.Rd2 Nf4 28.Rf2–+) 26.Rd2 (26.fg5 Bc4 27.Rd7 Bf7 28.Rd2 a6 29.ba6 ba6–+) 26...gf4 27.Re2 (27.Be2 Kg6 28.Kg2 fg3 29.hg3 Nf6–+) 27...Kf6 (27...Bc4 28.Re7 Kf6 29.Rh7 Bf1 30.Rh5 fg3 31.hg3 Bb5 32.Kg1–+) 28.gf4 (28.Rg2 fg3 29.hg3 f4 30.gf4 Nf4–+) 28...Nf4 29.Rf2 Ke5 30.Rf3 Ke4 (30...a6 31.Re3 Kd4 32.Ra3–+) 31.Rg3 (31.Ra3 a6–+) 31...Rd8 32.Bg2 (32.a4 Rd4–+) 32...Ng2 33.Rg2 (33.Kg2 Rd2 34.Kg1 Ra2–+) 33...Rd1 34.Rg1 Rg1 35.Kg1 Bc4 (35...Bc4 36.Kg2 Ba2–+) 0–1. Roitzsch,Hans Werner – Windt,Marius, GER North–ch U12, 2001.

5.Bf6 Qf6–/+ 6.Nc3 Bb4 7.Qb3 Bc3–+ 8.dc3 Nc6 9.Ne2 Ne5 10.c5? Nd3–+ 11.Kd2 Nc5 12.Qb4 Qd6 13.Nd4 b6 14.Bc4 a5 15.Qb2 Ne6 16.Be6 de6 17.Ke2 Ba6 18.Ke1 c5 19.Nc2 Qd3 20.Na3 Qd6?? 21.Rd1?? Bd3 22.Nb5 Qc6–+ 23.c4 0–0 24.Na3 Rfd8 25.g4 fg4 26.Rg1 Qa4 27.Rg4 g6 28.Qf6? Qe8 29.h4 Rd7 30.h5 Rg7 31.h6 Rf7–+ 32.Rg6? hg6 33.Qg6 Kh8 34.Qf6 Rf6 (34...Rf6 35.Rd3 ed3–+) 0–1. pinecrest1981 – oistkev, Live Game Caissa's Web, 2005.

5.b5 a6

6.a4 ab5 7.ab5 Ra1 8.Ba1 c6 9.Qb3 d5 (9...Bc5 10.Ne2=) 10.Nh3 (10.bc6 Nc6 11.Bf6 Qf6 12.cd5 Nb4 13.Bb5 Bd7+=) 10...Bd6 (10...Nbd7 11.Qa2=) 11.cd5 cd5 12.Bf6 Qf6 13.Qd5 Be7 (13...Qa1!? 14.Qd6 Qb1 15.Ke2 Qb5 16.Kd1 Qb1 17.Ke2 Qb5 18.Kd1 Qb1 19.Ke2 Qb5=) 14.Nf4 Nd7 15.Nc3 Nb6 16.Qa2 g5 17.Nfd5 Nd5 18.Nd5 Qf8 (18...Qe5 19.Bc4+/–) 19.Nc7 (19.Nb6 Kd8+–) 19...Kd8 20.Ne6 (better is 20.Qa5!? Bb4 21.Ne6 Ke7 22.Qb4 (22.Nf8? Ba5 23.Nh7 Rh7–+) 22...Ke6 23.Qc4 Ke7 24.h4 gh4 25.Rh4+–) 20...Be6+/– 21.Qe6 Qf6 22.Qd5 Kc7 23.Qc4 (23.Qa2!?+/–) 23...Kb8= 24.Be2 Rd8 25.0–0 Rd2 26.Bh5 h6 (26...g4 27.g3=) 27.Rc1 Rd8?? (27...Ka7 28.Qc7 Qb2 29.Rf1+=) 28.Qa4 (better is 28.Qc7 Ka7 29.Qa5 Kb8 30.b6 Qb6 31.Qb6 Rd7 32.Be8 Rd1 33.Rd1 Ka8 34.Rd7 Bd6 35.Qb7) 28...f4 (28...Qb2 29.Qc4 Qf6 30.Qc7 Ka7 31.Qa5 Kb8 32.b6 Qb6 33.Qb6+–) 29.Ra1 (better is 29.Qe4 Ba3 30.Re1+/–) 29...Qc3?? (better is 29...Bc5!? 30.ef4 Qf4 31.Qa8 Kc7 32.Qa5 Bb6 33.Qc3 Kb8=) 30.Qa7 (30.b6 Qa1 31.Qa1 Bd6 32.Qa7 Kc8 33.Bg4 Rd7 34.Qa8 Bb8 35.Qa4 Be5 36.Qd7 Kb8 37.Qd8) 30...Kc7+= 31.b6 Kc6 32.Qa4 Kb6?? (better is 32...Kd6 33.Rb1 Ke5=) 33.Rb1+– Kc7 34.Bf7 (better is 34.Qe4 Bb4 35.Be2 fe3 36.fe3+– (36.Qb4?! Qb4 37.Rb4 Re8+–)) 34...fe3–+ (34...fe3 35.Qe4 ef2 36.Kf1 b6–+) 0–1. GuestGQWV – GuestJXNM, freechess.org, 2017.

6.a4 ab5 7.ab5 Ra1 8.Ba1 c6 9.Nc3 d5 10.cd5 (10.d4 cb5 11.Nb5 Nc6=) 10...cd5 11.Be2 Bc5 Black intends d4 12.Bh5 g6 (12...Nh5 13.Qh5 g6 14.Qe2=) 13.Be2= 0–0 14.Na4 (14.Nh3 Bd6=) 14...b6 (14...Bd6 15.Bd4=) 15.Nh3 d4 (15...Bd6 16.Bd4 Nbd7 17.Nf4=) 16.Bc4+= Kg7 17.Nf4 (17.0–0 Nbd7+=) 17...Re8 (17...Bd6!?=) 18.0–0 Kh6 (18...Bd6 19.Bd4 Bf4 20.Bf6 Qf6 21.ef4+/–) 19.h3 g5 (19...Bd6 20.Bd4 Bf4 21.Bf6 Qf6 22.ef4+/–) 20.Ne2 d3 21.Nd4 (21.Ng3 g4+/–) 21...Nd5 (21...g4 22.hg4 Ng4 23.f3+= (23.Nc5? Qh4 24.Qg4 fg4–+)) 22.f4 (22.f3 Bd4 23.Bd4 Nf4+/–) 22...gf4+= 23.Bd5 Qd5 24.Rf4 Bd4? (24...Kg6!?+/–) 25.Bd4 (better is 25.Rh4 Kg7 26.Bd4 Re5 27.Qc1+–) 25...Qb5?? (better is 25...Qd8+–) 26.Rh4 Kg6 27.Qh5 1–0. GuestKVBT – GuestTTNX, freechess.org, 2017.

6.Qb3 +=.

6.Ne2 +=.

6.Bf6 Qf6 7.Nc3 +=.

4.Bc4 Nf6

5.a3 d5 6.Bb3 c6 7.c4 Bd6 8.Ne2 0–0 9.Ng3 f4 10.ef4 Bf4 11.0–0 Bg4 12.Qc2 Kh8 13.cd5 cd5 14.d3 e3 15.fe3 Be3 16.Kh1 d4 17.Nd2 Nc6 18.Nf3 Rc8 19.Qe2 Ne5 20.Qe1? Nd3 21.Qb1? Nf2 22.Rf2 Bf2 23.Qf1 Bg3 24.hg3 Nd5 25.Bd5?? Qd5 26.Qd3 Bf3 27.gf3 Qf3 28.Qf3 Rf3 29.Kg2 Rd3 30.Rf1 h6 31.Rf2 b5 0–1. bratek55 (1660) – donando, kurnik, 2011.

5.a3 d5 6.Bb3 c6 7.Ne2 Bd6 8.f4 0–0 9.0–0 Nbd7 10.g3 a5 11.ba5 Ra5 12.c4 dc4 13.Bc4 Kh8 14.Nd4 Nc5 15.Nc3 Ng4 16.h3 Bd7?? 17.hg4+– b5 18.Be2 fg4 19.Bg4 Nd3 20.Ra2 c5 21.Bd7 Qd7? 22.Nde2 Qh3 23.Ne4 Rf5? 24.Nf2 Nf2 25.Rf2 Qg3 26.Rg2 Qf3 27.Rg7 Be5 28.Be5 Re5 29.Rg3 Qd5 30.Nc3 Re3 31.Nd5 Rg3 32.Kf2 Rg7 33.f5 Raa7 34.f6 Raf7 35.Qe2 Rg6 36.Qe6 Kg8 37.Rb2 b4 38.ab4 c4 39.b5 h5 40.b6 Kf8 41.b7 Rb7 42.Rb7 Rf6 43.Qf6 (43.Qf6 Ke8 44.Qe7) 1–0. bratek55 (1620) – paul49 (1640), kurnik, 2011.

4.Qh5 g6

5.Qd1 Nf6 6.a3 d5 7.c4 c5 (7...Be6 8.cd5 Bd5 9.Nc3=) 8.b5 (8.cd5!? cb4 9.ab4+=) 8...d4= 9.ed4 cd4 10.Ne2 (10.d3!? Bc5 11.Nd2=) 10...d3–/+ 11.Nf4 Bg7 12.f3 (12.Nc3 0–0+=) 12...b6 (12...Qc7 13.g3 Qc4 14.Nc3–/+) 13.fe4 (13.Qb3 0–0+=) 13...fe4 14.Nc3 Bg4 15.Qb3 Nbd7 16.h3 (16.Qa2 Nc5–/+) 16...Nc5 17.Qa2 Be6 (17...Qd6 18.Ncd5 Bd7 19.Nf6 Bf6 20.g3–/+) 18.Ne6 Ne6 19.0–0–0 Nc5 20.Nd5 (20.Re1!? Qc7 21.g4+=) 20...Rc8 (20...0–0 21.Nc3–+) 21.g4 0–0 22.Bg2?? (better is 22.Bf6 Bf6 23.Bg2–/+) 22...Nd5–+ 23.Bg7 Kg7 24.cd5 Na4 (better is 24...Rf2 25.Kb1 Rg2 26.Rdg1 Rg1 27.Rg1–+) 25.Kb1 Qe7 (25...Rc2 26.Qa1 Rb2 27.Qb2 Nb2 28.Kb2 Qd5 29.Rhe1 Qb5 30.Ka2 Qd5 31.Kb2–+) 26.Rhf1? (26.Rc1 e3 27.Qa1 Kg8–/+) 26...Rf1 (26...Rc2 27.Qa1 Rb2 28.Qb2 Nb2 29.Kb2 Qe5 30.Kb1 Qd5 31.Ka1–+) 27.Rf1 Nc5 (better is 27...Rc5!? 28.d6 Rb5 29.Kc1 Qd7–+ (29...Qd6?! 30.Qf7 Kh6 31.Qf4 Qf4 32.Rf4–+)) 28.Qa1 Kg8 29.Qd4 1–0. GuestFTPC – GuestTMZB, freechess.org, 2017.

5.Qd1 Nf6 6.b5 Bc5 7.c4 (7.Nc3 0–0=) 7...0–0 (7...Be7 8.d3=) 8.Nc3 (8.d4 Be7=) 8...d5 (8...a6!?=) 9.cd5+= Nd5 (9...Nbd7 10.Qb3+=) 10.Bc4 c6 11.Nge2 (11.Qb3 Be6 12.bc6 bc6 13.Nd5 cd5 14.Qc3+/–) 11...Be6= 12.0–0 (better is 12.bc6 bc6 13.d3+=) 12...Nf4?? (12...cb5 13.Nb5 Nc6 14.Rc1=) 13.Be6 (better is 13.Qb3! Nd5 14.bc6 bc6 15.Nd5 cd5 16.Qc3+–) 13...Ne6+= 14.Na4 (better is 14.f3 ef3 15.Rf3+=) 14...cb5?? (14...Qd3 15.Nc5 Nc5 16.bc6 Nc6 17.Nf4=) 15.Nc5?? (better is 15.Qb3 ba4 16.Qe6 Rf7 17.Qe5+–) 15...Nc5+= 16.Rc1 Nd3 (16...Nba6 17.Bd4 Nd3 18.Rb1+=) 17.Qb3 Rf7 18.Ba1? (better is 18.Qc3!? Nb2 19.Qb2+=) 18...Nc1–+ 19.Rc1 Nc6 20.Nf4? (better is 20.Qb2 Kf8 21.Nf4–/+) 20...Qd2 21.Rd1 Qb4 22.Qe6 (22.Nd5 Qb3 23.ab3–+) 22...Qe7 (better is 22...Rd8 23.Nd5 Kf8–+) 23.Qb3 Rd8 0–1. GuestQZLW – GuestYKTH, freechess.org, 2016.

5.Qd1 Nf6 6.b5 Bg7 7.Nh3=.

3.e3 Nh6

4.Nc3 a5 5.b5+= d5 6.Nge2 (6.d3 ed3 7.Bd3 Be6+=) 6...a4 7.Nf4 (7.a3 Ng4+=) 7...c6 8.Rb1 Nf5 9.bc6 bc6 10.d3 Qa5 11.Qd2 ed3 12.Bd3 Bd6 13.Nce2 Qc5 (better is 13...Qd2!? 14.Kd2 0–0=) 14.Ng3+/– a3? (14...Ng3 15.hg3 (15.fg3?! 0–0=) 15...Bf8 16.Nh5+/– (16.Bh7? Bf5–+)) 15.Bc3 (15.Bf5!? ab2 16.Nd3 Qb6 17.Bc8 Ra2+–) 15...Ng3 16.hg3 (16.fg3?! 0–0+=) 16...Bf4 17.gf4 (worse is 17.ef4 d4 18.Bb4 Qd5+/–) 17...Bg4? (17...f6+–) 18.f3 Be6 19.Bg7 Rg8 20.Bd4 (20.Rh7?! Qe7+–) 20...Qd6 21.Bh7 (21.Rh7?! c5 22.Be5 Qd8+–) 21...Rf8 22.Be5 Qe7 (22...Qd8 23.f5 f6 24.Bb8 Rb8 25.Rb8 Qb8 26.fe6 Qb1 27.Kf2 Qh1 28.Qb4 Qh7 29.Qb8 Ke7 30.Qc7 Ke6 31.Qh7+–) 23.Bb8 Qc5 (23...Qd7 24.Qb4 d4 25.Bd6 de3 26.Rd1+–) 24.Kf2 (24.Be5 Qc4 25.Bg7 d4+–) 24...Bc8 (24...Qe7 25.Qc3 c5 26.Rb6+–) 25.Be5 Kd8 26.Bd4 Qe7 (26...Qd6+–) 27.Qc3 f5 (27...Qe6 28.Qc5 Ke8+–) 28.Bb6 Kd7 29.Rh6 Bb7 30.Bc5 Rab8 31.Be7 Rf7 (31...Ra8 32.Rb7 Ke8 33.Qc6 Kf7 34.Ba3) 32.Rb7! Rb7 (32...Rb7 33.Qc6 Mate attack) 33.Qc6 Ke7 34.Re6 Kf8 35.Re8 Kg7 36.Qg6 1–0. pierre – comp (1770), internet, 2014.

4.c4 d5 5.cd5 Qd5 6.Nc3+=.

4.c4 f6 5.b5 c5 (better is 5...a6!?=) 6.Nc3+/– a6 7.a4 (7.ba6 Na6 8.Ne4 Be7+/–) 7...d6 (7...ab5 8.ab5 Ra1 9.Ba1+/–) 8.Qc1 (8.Qh5 Nf7 9.Ne4 Be6+/–) 8...Bf5+= 9.Be2 (9.Qc2 ab5 10.ab5 Ra1 11.Ba1 Be7+/–) 9...Nd7 (9...ab5 10.ab5 Ra1 11.Qa1+=) 10.Bh5 (10.f3 ef3 11.Nf3 Ne5+=) 10...g6= 11.Be2 Nf7 (11...Ne5 12.Qb1=) 12.Nd5 (12.ba6 Ra6 13.Qc2 Nde5+/–) 12...Ng5 (12...Bg7!?=) 13.h4 (better is 13.Qb1 h5 14.h4+/–) 13...Ne6? (13...Nf7 14.g4 Be6 15.Qc2 Bd5 16.cd5+/–) 14.h5?? (better is 14.g4!? Nc7 15.gf5 Nd5 16.cd5 gf5 17.ba6 ba6+–) 14...Ne5 (better is 14...Ng5!?+/–) 15.g4! Bg4 (15...Ng4 16.Bg4 Combination; 15...Bg4 16.Be5 Decoy) 16.Bg4?? (better is 16.Be5!? de5 17.Bg4+–) 16...Ng4?? (better is 16...Nd3 17.Ke2 Nc1 (17...Nb2?? 18.Qb2 Nc7 19.Nf6 Kf7 20.hg6 hg6 21.Rh8 Qf6 22.Qf6 Kf6 23.b6+–) 18.Rc1 f5 19.Bh8 fg4 20.hg6 h6=) 17.hg6+/– h5 (17...Ng5 18.b6 Rc8 19.Qd1+–) 18.f3 (18.Qc2 Ng5 19.Nh3 Nf3 20.Ke2 ab5 21.Qe4 Nge5 22.Qf5+– (worse is 22.ab5 Rb8+–)) 18...ef3+/– 19.Nf3 Bh6 (19...Bg7 20.Qb1 ab5 21.Qf5+–) 20.Qc3 (20.ba6 Ra6 21.Rh5+–) 20...Bg5? (better is 20...ab5 21.ab5 Ra1 22.Ba1 Ne5+=) 21.Ng5+– Ng5 22.Nf6 Nf6 23.Qf6 Qf6 24.Bf6 Nf3 25.Ke2 Rf8?? (25...0–0 26.Be7 Rfe8 27.Bd6 Nd4 28.Kd1 Rad8+–) 26.g7 (26.Kf3?! Rf6 27.Ke4 Rg6 28.Rh5 0–0–0+–) 26...Rg8 27.Kf3 Kf7 28.Bc3 ab5 29.Rh5 (better is 29.cb5 Rg7 30.Bg7 Kg7 31.Rh5 Kg6+–) 29...ba4 30.Rg1 (30.Rb1 Rab8+–) 30...Rae8 (30...a3 31.Ke4 a2 32.Kd5+–) 31.Rf5 Ke7 32.e4 (32.Ke4 a3+–) 32...Kd7 (32...a3 33.e5 Ra8 34.ed6 Kd6 35.Rf7+–) 33.Rf7 Kc6 34.Ra1 (34.d4 cd4 35.Bd4 Rb8+–) 34...b5 (34...Ra8 35.Rb1 Rab8 36.Rh1+–) 35.cb5 Kb5 (35...Kb6 36.Rh1 a3 37.Rh8 Kb5 38.Rf8 Ref8 39.gf8R Rf8 40.Rf8+–) 36.d3 (36.Rb7 Kc6 37.Rab1 Re4 38.Ke4 Re8 39.Kf5 Kd5 40.Rb8 Re5 41.Be5 Kc4 42.g8Q d5 43.Rd8 Kd3 44.Qd5 Kc2 45.Qd3) 36...Kc6 (36...Ka6 37.Ra4 Kb5 38.Ra2+–) 37.Ra4 (37.Rb1 Rg7 38.Rg7 Rg8 39.Rgb7 Rf8 40.Ke3 Rf3 41.Kf3 c4 42.R1b6 Kc5 43.d4) 37...d5 (37...Rd8 38.Raa7 Rge8 39.Rab7+–) 38.Ra6 (better is 38.ed5 Kb6+–) 38...Kb5 39.Ra5 Kb6 40.Rf6 Kb7 41.Rb5 Kc7 (41...Ka7 42.Rf7 Ka6+–) 42.Rf7 Kd8 43.Ba5 (43.Rb8) 43...Kc8 44.Rc5 (44.Rc7 Kd8 45.Rb8) 44...Kb8 45.Bc7 (45.Bd2 de4 46.de4 Re4 47.Ke4 Re8 48.Kf3 Ka8 49.Ra5 Kb8 50.Bf4 Kc8 51.Ra8) 45...Ka8 46.Bb6 (46.Bd6 de4 47.de4 Re7 48.Re7 Rg7 49.Rc8) 46...de4+– 47.de4 Kb8 48.Bc7 (48.Ba7 Ka8 49.Ra5 Re7 50.Be3 Kb7 51.Re7 Kc6 52.Ra6 Kb5 53.Rb6 Kc4 54.Rc7 Kd3 55.Rd6) 48...Ka8 49.Bd6 Rd8 (49...Re7 50.Re7 Rg7 51.Rc8) 50.Ra5 1–0. GuestFHMY – GuestVTJD, freechess.org, 2016.

4.d3 d5 5.de4+= de4 (5...Bb4 6.c3 Bd6 7.ed5+/–) 6.Qd8 Kd8 7.a3 (7.Nd2 Bf5+/– (7...Bb4? 8.Bg7 Ng4 9.Bh8 Bd2 10.Kd2 Nf2 11.Bc4+–)) 7...f6 (7...a5 8.b5+=) 8.g3 (8.Nc3 Bf5+/–) 8...Bd6 (8...a5 9.ba5 Nf7 10.Nc3+=) 9.Bg2 a5 10.b5 (better is 10.ba5 Bf5 11.Nd2+=) 10...a4? (10...Bf5 11.Nd2 Re8 12.Ne2+=) 11.Be4 (11.Nd2 Ra5 12.c4 Be6+–) 11...Ra5 (11...Nd7 12.Nc3+/–) 12.c4 (12.Nc3 Nd7+/–) 12...Nd7 13.Bd4 (13.Nd2+/–) 13...c5 (13...Nc5!? 14.Bc5 Bc5+/–) 14.bc6 bc6 15.Bc6 Be5? (15...Ne5 16.Bd5 Ke7 17.Nc3+–) 16.Be5?? (better is 16.Nf3+–) 16...Ne5+/– 17.Bd5 Nd3 (17...Nhg4!? 18.h3 Nd3 19.Ke2 Nc1 (19...Ngf2? 20.Rh2+–) 20.Kf1 Nb3+/–) 18.Ke2+– Nc1 (18...Ba6 19.Nd2 (19.Kd3?! Rd5 20.Ke2 Bc4 21.Ke1 Ng4=) 19...Ng4 20.Nh3 (20.Kd3?! Rd5 21.Kc3 Rd2 22.Kd2 Nf2+=) 20...Rd5 21.cd5 Ndf2 22.Kf3 Nh1 23.Kg4 (23.Rh1?! Ne5 24.Ke4 Kd7+=) 23...Bc8 24.Kf3 Bh3 25.Rh1+/–) 19.Kf3 (19.Kf1 Nb3 20.Ra2 Ke7+–) 19...Ra7 (19...Nd3 20.Nc3 Ng4 21.Ra2+–) 20.Nd2 (20.Nc3 Nb3 21.Ra2 Nf7+–) 20...Bg4 (20...Nb3 21.Ra2+–) 21.Kg2 Nd3 (21...Nb3 22.Ra2+–) 22.Ngf3 Nf5 (22...Ke7 23.h3 Bd7 24.Ne4+–) 23.h3 Nf2 (23...Bf3 24.Nf3 Nc5+–) 24.Kf2 Bf3 25.Nf3 Re7 (25...Ke7 26.Rab1+–) 26.Rhe1 (26.Nd4 Nd4 27.ed4 g5+–) 26...h5 (26...Nd6 27.Nd4 Kd7 28.c5 Ne4 29.Be4 Re4 30.Reb1+–) 27.e4 Nd6 28.e5 (better is 28.c5 Nb7 29.Rab1+–) 28...h4 (28...fe5 29.c5 Nf7+–) 29.ed6 Re1 30.Re1 Re8 31.Re8 Ke8 32.Nh4 Kd7 33.Nf5 (33.c5 f5 34.Nf5 g6 35.c6 Ke8 36.c7 Kd7 37.Be6 Ke6 38.c8Q Kf6 39.d7 Ke6 40.d8Q Kf7 41.Qc4) 33...g6 34.Ne7 (better is 34.Nh4!? Kd6 35.Ng6 Kd7+–) 34...Kd6 35.Ng6 Kc5 36.Ke3 f5 (36...Kd6 37.h4 f5 38.h5 Kd7 39.h6 Kd8 40.h7 f4 41.gf4 Kc7 42.h8Q Kb6 43.Qb8 Ka6 44.f5 Ka5 45.Qb5) 37.h4 Kd6 (37...Kb6 38.h5 Ka5 39.h6 Kb6 40.h7 f4 41.Nf4 Ka6 42.h8Q Kb6 43.Qb8 Ka6 44.c5 Ka5 45.Qb6) 38.h5 Kd7 (38...f4 39.gf4 Kd7 40.h6 Kc7 41.h7 Kb6 42.h8Q Kc7 43.Qg7 Kb6 44.Qb7 Kc5 45.Qc7) 39.Bf7 (39.h6 Kd8 40.h7 Kd7 41.h8Q Kc7 42.Qg7 Kc8 43.Ne5 f4 44.gf4 Kb8 45.Qb7) 39...Kd8 (39...Kc7 40.h6 Kd6 41.h7 f4 42.gf4 Kd7 43.h8Q Kc7 44.Qa8 Kb6 45.Qb8 Kc6 46.Ne5 Kc5 47.Qb4) 40.h6 Kd7 (40...Kc8 41.h7 Kc7 42.h8Q Kb7 43.Bd5 Kc7 44.Qg7 Kc8 45.Ne5 f4 46.gf4 Kb8 47.Qb7) 41.h7 Kd6 (41...Kc6 42.h8Q Kb7 43.Bd5 Kc7 44.Qg7 Kd8 45.Qe7 Kc8 46.Nf4 Kb8 47.Qb7) 42.h8Q f4 (42...Kc7 43.Qa8 Kd7 44.Be8 Kc7 45.Qa7 Kc8 46.Nf4 Kd8 47.Qd7) 43.gf4 Kc5 (43...Kc7 44.Qa8 Kb6 45.Qb8 Kc6 46.Ne5 Kc5 47.Qb4) 44.Qc8 (44.Qb8 Kc6 45.Ne5 Kc5 46.Qb4) 44...Kb6 45.Bd5 (45.Be8 Ka7 46.Qc7 Ka6 47.Bb5) 45...Ka7 (45...Ka5 46.Qc5 Ka6 47.Qd4 Ka5 48.Qa7) 46.Qb7 1–0. Trkn – Kent, itsyourturn.com, 2000.

4.Nc3 d5

5.a3=.

5.b5 c6+=.

3.f3 d5

4.e3 (--> 3.e3 d5 4.f3).

4.fe4 Qh4 5.g3 Qe4 6.Nf3 Bg4 (6...Bb4?? 7.Bg7 Bf5 8.c3+–) 7.Bg2 Bb4?? (better is 7...Qb4 8.Ba3 Qc4+=) 8.Bg7+– Nd7 9.Bh8 f6 10.0–0 0–0–0 11.d3 (11.c3!? Bd6 12.Nd4 Qg6+–) 11...Bc5 Black prepares d4 (11...Qe3 12.Kh1 Ne7+–) 12.Kh1 Qe3 13.Nc3 (13.d4 Bf3 14.ef3 Qd4 15.Qd4 Bd4+–) 13...d4?? (better is 13...Ne7+–) 14.Ne4 Bb6 15.a4 a5 16.Nf2 (16.c3 h5 17.Bg7 dc3+–) 16...Bf3 (16...Nh6 17.Bg7 Bf3 18.Bf3 Nf5+–) 17.ef3 (17.Bf3 h5+–) 17...Ne5 (17...Qe6 18.Re1 Qf7 19.Bh3+–) 18.Ne4 Nd7 (18...Qh6 19.Qc1 Qg6 20.Qf4+–) 19.Re1 (better is 19.f4 Ne7 20.Bf6 Nf6+–) 19...Qh6 20.f4 (better is 20.Nf2 Qg6 21.Bh3 Nh6+–) 20...f5 (20...Ne7 21.Nd6! cd6 22.Re7 Rh8+–) 21.Ng5 Ne7 22.Re7 Qd6 (22...Rh8 23.Qe2 Rd8 24.Nf7+–) 23.Re6 (better is 23.Qe1!? Qg6+–) 23...Qf8 (23...Qc5 24.Nf7 Rg8 25.Qh5+–) 24.Be5 (24.Qf3!? Nc5 25.Bf6 Re8 26.Re8 Qe8 27.Bd4 c6+–) 24...Ne5 25.Re5 h6 (25...Re8 26.Qf3 c6 27.Rb1 Re5 28.fe5+–) 26.Ne6 Qb4 27.Nd8 Kd8 28.Qh5 Kd7 (28...Qf8 29.Rae1 c6 30.Re8 Kc7 31.Qh4 Kd6 32.Rf8 Bd8 33.Qd8 Kc5 34.Rb1 b5 35.Rf5) 29.Qe8 Kd6 30.Qe7 1–0. Fournier,Frederic (2030) – Ejote, Active, 2005.

4.fe4 de4

5.e3 Bb4?? 6.Bg7+– Bd6 7.Bh8 Qh4= 8.g3?? Bg3! 9.Ke2 Bg4 10.Nf3 Bf3# (10...ef3?! 11.Kd3=) 0–1. guest616 – guest1654, ICS blitz, 2000.

5.g3 Bb4?? 6.Bg7 Nf6 7.Bh8 +–.

5.g3 f5 6.Bg2 Be6 (6...Bb4?? 7.Bg7 Be6 8.Bh8+–) 7.e3 Bd5 (7...Nf6!?–/+) 8.Ne2= Nh6 9.0–0 Qd7 (9...Bb4? 10.Bg7 Nf7 11.Bh8 Nh8 12.Rf5+–) 10.Nf4 Bc4 (10...Bb4? 11.Nd5 Qd5 12.Bg7+–) 11.d3 ed3 12.cd3 (12.Nd3?! Nc6 13.Qh5 Bf7=) 12...Ba6 13.a3 c6 14.Nc3 b5? (better is 14...Ng4!?+=) 15.e4+– fe4 (15...Bd6 16.Qh5 Kd8 17.Nce2+–) 16.de4 (16.Qh5 Nf7 17.Ne4 Be7 18.Bg7 Rg8+–) 16...Bb7 17.Qh5 Qf7? (17...Nf7 18.e5 g6 19.Qe2+–) 18.Qf7 (better is 18.Qe5 Qe7 19.Ne6+–) 18...Nf7 19.Ne6 Kd7?? (19...Na6 20.Rad1+–) 20.Nc5 (better is 20.Rf7 Ke6 21.Rb7+–) 20...Bc5+/– 21.bc5 Rg8?? (better is 21...Ke7+/–) 22.Rf7+– Ke8 23.Rb7 Nd7 (23...Na6 24.e5 Rc8 25.Rf1+–) 24.Rc7 Nc5 25.Rc6 (better is 25.e5 Kd8 26.Rc6 Nd7+–) 25...Nd3 26.Rb1 Nb2 27.Rb2 a6 (27...Rf8 28.Nb5 Rb8 29.e5+–) 28.a4 (better is 28.e5 Rf8+–) 28...Ra7 (28...ba4 29.e5 a3 30.Ra2+–) 29.ab5 (29.Rc8 Ke7 30.Rg8 Kf7+–) 29...ab5 30.Nb5 (better is 30.Rc8 Kf7 31.Rf2 Ke7 32.Rg8 Ra1 33.Bf1 g6 34.Rg7 Ke6 35.Nb5 Rb1+–) 30...Ra8 (30...Ra1 31.Kf2 Rf8 32.Ke2+–) 31.e5 (better is 31.Bh3 g5 32.Nc7 Ke7 33.Na8 Ra8 34.Rb7 Ke8 35.Rh7 Kf8 36.Rh8 Kf7 37.Ra8 Ke7 38.Ra7 Ke8 39.Rc8) 31...Rb8 (31...Ra1 32.Kf2 Rf8 33.Ke2 Ke7 34.Rc7 Ke6 35.Nd4 Ke5 36.Rb5 Kf6 37.Rc6 Kf7 38.Bd5 Ke8 39.Rb8 Kd7 40.Rb7 Kd8 41.Ne6 Ke8 42.Rc8) 32.Rcc2 (32.Rc7 Rb6 33.Ra2 Ra6 34.Ra6 Rf8 35.Ra8) 32...Ke7 (32...Kd8 33.Rd2 Ke7 34.Nd4 Rb2 35.Rb2+–) 33.Nd4 (33.Rc7 Ke6 34.Bh3 Kd5 35.Rd2 Ke4 36.Rd4 Ke5 37.Re7 Kf6 38.Re6 Kg5 39.Rd5) 33...Rgd8 34.Rb8 (better is 34.Nc6!? Ke6 35.Bh3 Kf7 36.Rb8 Rd1 37.Kf2 Kg6+–) 34...Rb8 35.e6 (35.Nc6 Ke6 36.Nb8 Ke5+–) 35...Rb4 (35...Kd6+–) 36.Rc7 Kf6 37.Kf2 (37.Rf7 Kg5 38.e7 Rb1 39.Rf1 Rb8 40.Ne6 Kh5 41.Nd8 Rb3 42.e8Q Kh6 43.g4 g6 44.Nf7 Kg7 45.Qh8) 37...Rd4 38.e7 Kf7 39.Ra7 (39.Bc6 Rd2 40.Ke3 Ke6 41.e8Q Kf6 42.Qe7 Kg6 43.Be4 Kh5 44.Qh4) 39...Rd2 40.Kf3 Rd3 41.Kg4 Rd4 42.Kh3 h6 (42...Rd6 43.Be4 Ke8+–) 43.Bc6 g5 (43...Rd7 44.Rd7 h5 45.Rc7 Kf6 46.e8Q Kg5 47.Be4 h4 48.Qg6) 44.e8Q Kf6 45.Rf7 Kg6 46.Re7 1–0. Fournier,Frederic – franek10000, Active, 2005.

5.Nh3?? Qh4 6.Nf2 Nc6 7.a3 Bf5 8.g3 Qh6 9.Bg2 0–0–0 10.Ne4 Be4 11.Be4 Nf6 12.Bc6 bc6 13.0–0?? Ng4=+ 14.h4 Bd6 15.Kg2 f6 16.e3 Be5?? 17.Qg4+– Kb7 18.Be5 fe5 19.c4 Rhf8 20.Rf8 Rf8 21.Nc3 Rd8 22.Ne4 Qg6 23.Qg6 hg6 24.Ra2 Rd3 25.Nc5 (25.Nc5 Kc8 26.Nd3+–) 1–0. bratek55 (1715) – ff16, kurnik, 2011.

3.f3 ef3

4.Nf3 Bb4

5.e4 Nf6 6.e5 Qe7 7.Bc4 Ne4 8.0–0 Bc5?? 9.Kh1?? 0–0?? 10.Qe2 Ng5+= 11.Ng5 Qg5 12.Rf3 Nc6 13.Qf1 Ne5 14.Rf5+/– Qe7? 15.Be5?? d5 16.Bd5 Bf5 17.Qf5 Kh8?? 18.Nc3 Rad8?? 19.Be4+– Qh4 20.Bg3 Qh6 21.Bf4 Qg6 22.Qc5 f5 23.Bd3 Rfe8 1–0. guest948 – guest369, ICC, 1999.

5.Bg7 f6 6.Bh8 d5 7.c3 Bf8 8.Qa4 Qd7 9.Qd7 Bd7 10.e3 Nc6 11.Bb5 a6 12.Bc6 bc6 13.0–0 0–0–0 14.Nd4 c5 15.Nb3 d4 16.cd4 c4 17.Nc5 Re8 18.Nd7 Kd7 19.Bf6 Nf6 20.Rf6 Be7 21.Rf7 (21.Rf7 h6 22.Rh7+–; 21.Ra6!? c5 22.d5 Bd6+–) 1–0. touwladder – breaker, ChessWorld.net, 2004.

4.Nf3 Nf6

5.b5 d5 6.e3 h6 7.c4 Ne4 8.Nc3 Nc3 9.Bc3 Be6 10.Nd4 Qh4 11.g3 Qe4 12.Rg1 Bc5 13.cd5 Bd5 14.Bg2+– Qe5 15.Qg4 Bg2 16.Qc8 Ke7 17.Nf5 Qf5 18.Qf5 Be3 19.Rg2 Bg5 20.Qe4 Kd6 21.Qb7 Nd7 22.Bb4 Nc5 23.Qc6 Ke5 24.Re2 Kf5 25.Qc5 (25.Qc5 Kg6 26.Qc2 f5 27.g4 Bh4 28.Kd1+–; 25.Rf2 Bf4 26.Rf4 Kg5 27.Qc5 Kg6 28.Qf5) 1–0. sicilian – pede (2115), net–chess.com, 2006.

5.d4? Bb4–/+ 6.c3 Ba5 7.e3 d5 8.Bb5 c6 9.Bd3 Be6 10.0–0 Nbd7 11.c4 dc4–+ 12.Bc2 0–0 13.h3 Re8 14.Ne5? Ne5 15.Rf2 Ng6 16.g4 Nh4 17.Rf4 Nd5 18.Re4 Qd6 19.Ba3 Qg3 20.Kf1 Qg2 0–1. KaiKerling – Long_Knights, ChessWorld.net, 2005.

5.e4 Bb4 6.Qe2 (6.a3 Ba5–/+) 6...0–0 7.Nc3 (7.e5 Re8–/+) 7...Nc6 (7...Re8 8.e5–+) 8.e5 Re8 9.0–0–0 d6 (better is 9...d5–+) 10.e6? (better is 10.d4!?–/+) 10...Be6–+ 11.Qd3 (11.a3 Bc5–+) 11...Ne5 (better is 11...Ng4 12.Qb5 Nf2 13.Bc4 Nd1 14.Nd1–+) 12.Ne5 de5 13.Qd8 (13.Re1 Bd6–+) 13...Rad8 14.Nb5 (14.Bd3 Ng4 15.Rhf1 Nh2–+) 14...c6 (better is 14...Bg4 15.c3 Bd1 16.cb4 Ba4–+) 15.Nc7 Re7 16.Ne6 Re6 17.Bc4 Nd5 18.Rhe1 (18.a3 Bd6–+) 18...b5 (18...e4 19.Re2–+) 19.Bd3 Bd6 20.c4 (20.Bf5 Re7–+) 20...Nb4 (better is 20...Nf4 21.Bf1 e4 22.g3 Nd3 23.Bd3 ed3 24.Re6 fe6 25.Re1–+) 21.Bb1? (21.Bf5 Rf6 22.Bb1 bc4 23.Be5 Be5 24.Re5–+) 21...bc4 22.Bc3 (22.Re4 Nd3 23.Bd3 cd3–+) 22...Nd3 23.Bd3 cd3 24.Re3 (24.Kb2 e4–+) 24...e4 25.Rde1 (25.Kb2 Bh2 26.Kb3 f5–+) 25...f5 26.g4 (26.Kb2 Rb8 27.Ka1 Rg6–+) 26...g6 (better is 26...Rb8 27.Bb2 Re7 28.Rd3 ed3 29.Re7 Be7 30.gf5–+) 27.g5 (27.gf5 gf5 28.Rg1 Kf8 29.Bg7 Kf7–+) 27...Be5 (better is 27...Rb8!? 28.Bb2 Re7 29.a3–+) 28.Bb4 (28.Bb2 Rd5 29.Be5 Ree5 30.a4–+) 28...Rb8 29.a3 (29.Bc3 Bd6 30.Bb2 Re7–+) 29...a5 (better is 29...c5 30.Ba5 Bb2 31.Kb1 Bd4 32.Ka2 Rb2 33.Ka1 Rd2 34.Kb1–+) 30.Bc5 (30.Ba5 Re7 31.Bc3 Reb7–+) 30...Bb2 (30...Rb5!? 31.Bb4 ab4 32.a4 Rc5 33.Kb1–+) 31.Kd1 (31.Kb1 Bd4 32.Ka2 Rb2 33.Ka1 Bg7–+) 31...Re5 (31...Bd4 32.Bb4 ab4 33.R1e2 ba3 34.Rd3 ed3 35.Kc1 Re2 36.h3 Re1) 32.h4 (32.Rd3 ed3 33.Re5 Be5 34.Ke1–+) 32...Rc5 0–1. Nautiluschess – glipinsky, ICS blitz, 2000.

3.g3 Nf6

4.a3 d5 5.d3 Bf5 6.Nd2 Nbd7 (6...a5 7.b5 (7.de4 de4 8.b5 Nbd7 9.Bh3 Bh3 10.Nh3+=) 7...Bc5 8.de4 de4 9.Nb3 Bd6 10.Qd2+=) 7.Bg2 (7.Bh3 Bg6 8.de4 de4 9.Nb3 c5 10.bc5+=) 7...c5 8.bc5 (8.de4 de4 9.c3 Qb6 10.Nh3+=) 8...Bc5 9.d4 Bb6 (9...Be7 10.c4–/+) 10.c4 Rc8 11.c5 Ba5 12.e3 (12.Rc1 b6–/+) 12...b6–+ 13.c6 Rc6 14.Ne2 Qc7 15.Rc1 0–0 16.0–0 Rc8 17.Rc6 Qc6 18.Nb3 Qc2 19.Ba1 Qd1 20.Rd1 Rc2 21.Na5 ba5 22.Nc3 Nb6 23.Rb1 Ng4 (23...Kf8 24.Bf1–/+) 24.Nd1 (better is 24.Nd5!? Kf8 25.Nb6 ab6 26.d5=) 24...h6 25.h3 Nf6 26.g4 Bd7 27.Bc3 (27.Nc3!?–/+) 27...Nc4–+ 28.Bf1 Na3 29.Ra1 Nc4 30.Ba5 Na5 31.Ra5 Rc7 32.Ra3 Rc1 33.Nc3 h5 34.Ne2 Rb1 35.Ra7 hg4 36.Nc3 Rc1 37.Ne2 Re1 38.hg4 Bg4 39.Ng3 Nh5 40.Kh2 Ng3 41.Kg3 Rf1 42.Kg4 Rf2 43.Rd7 Rf3 44.Rd5 Re3 45.Re5 g6 46.d5 (46.Kf4 Re1–+) 46...Rd3 47.Kf4 f6 (47...f5!? 48.Kg5 Kf7 49.Kf4–+) 48.Re6 Rd5 49.Ke4 Rf5 50.Re7 Kf8 51.Ra7 Re5 52.Kf3 Re7 53.Ra8 Kf7 54.Ra5 Rc7 55.Ke4 Rc4 (55...f5 56.Kf4–+) 56.Kf3 (56.Kd5 Rh4 57.Ra7 Kg8–+) 56...f5 57.Ra7 Kf6 58.Ra6 Kg5 59.Ra3 Rf4 60.Kg3 Rg4 61.Kf3 f4 (61...Rh4 62.Ra6–+) 62.Ra5 Kh4 63.Ra8 Kh5 64.Rh8 (64.Rg8–+) 64...Kg5 65.Rg8 Rg3 66.Kf2 Ra3 67.Rg7 Kf5 68.Rf7 (68.Rc7 g5 69.Rc5 Kg4–+) 68...Kg4 69.Rb7 Ra2 70.Ke1 g5 71.Rb5 f3 72.Kf1 Kf4 73.Rb1 (73.Ke1–+) 73...Kg3 74.Kg1 Rg2 75.Kh1 Rh2 76.Kg1 f2 77.Kf1 Rh1 78.Ke2 Rb1 0–1. Viloria,Daniel – Garcia,Alejandro, ATL–ch2a Barranquilla, 1999.

4.d4 Bb4–+ 5.c3 Ba5 6.Nd2 d5 7.Qa4 Nc6 8.Nb3 Bb6 9.Nh3 0–0 10.Nf4 Bd7 11.Nc5 Bc5 12.dc5 Re8 13.Bg2 Ne5 14.Qb3 Nf3! 15.ef3 c6?? 16.0–0 b6? 17.cb6 ab6 18.c4 g5 19.Bf6 Qf6 20.Nh5 Qg6 21.g4 Be6 22.cd5 Bd5 23.Qb6 ef3 24.Bh1 Qe6 25.h3 Ra3?? 26.Nf4 gf4–/+ 27.Rfe1? Qe1–+ 28.Re1 Re1 29.Kh2 Ra2 30.Qd8 Kg7 31.Qg5 Kf8 32.Qd8 Re8 (32...Re8 33.Qd6 Kg7 34.Qf4 f6–+) 0–1. hasant (1915) – kode (2345), net–chess.com, 2008.

4.Bg2 Bb4

5.a3 Bc5 6.Nc3 d5 7.e3 0–0 8.Nge2 Re8 9.0–0 Nbd7 10.Nf4 (10.d3 Qe7–/+) 10...Nb6 (10...c6 11.Nce2–+) 11.d3 Bg4 12.Qe1 c6 13.a4 ed3 14.Nd3 Bd6 15.Nb1 Qe7 16.Nd2 Ne4 17.Ne4 de4 18.Qc3 f6 (18...Qg5 19.Nf4–+) 19.Nf4 Qf7 20.Qb3 Nc4 21.Bc1 g5 22.Nh3? Be6 23.Rd1 Be5 24.c3 Ne3! 25.Qe6 Qe6 26.Be3 Bc3 27.Rab1 b6 28.Kh1 Rad8 29.Ng1 Rd1 30.Rd1 Qb3 31.Rc1 c5 32.Bf1 Kf8 33.Bb5 Rd8 34.Bc6 Bd2 35.Bd2 Rd2 36.Be4 Rf2 37.Re1 Qb2 38.Nf3 g4 39.Rb1 gf3 0–1. RVJ1943 – mrkt, ChessWorld.net, 2003.

5.c4 0–0 6.Nc3 Re8 7.Qc2 Qe7 8.Rb1 Na6 –/+.

5.e3 d5 6.Ne2 0–0 7.0–0 (7.f3 ef3 8.Bf3 Bg4–/+) 7...Bf5 (7...Qd6 8.f3 ef3–/+) 8.a3 (8.f3 Nbd7–/+) 8...Be7 9.Nbc3 Qc8 10.Nf4 c6 11.Nce2? (better is 11.f3–/+) 11...g5–+ 12.Bf6 Bf6 13.Nh5 Bh8 (13...Ba1?! 14.Qa1 f6 15.Nf6 Kf7 16.Nh5–/+) 14.Rb1 (14.h3 g4 (14...Ba1 15.Qa1 f6 16.g4 Bg4 17.hg4=) 15.Rb1 gh3–+) 14...Bg4 15.Nhf4 (15.f3 Bh5 16.fe4 d4–+) 15...gf4 16.ef4 Re8 17.Qe1 (17.f3 Bf5–+) 17...b5 18.Nc1 Bg7 19.Na2 Nd7 20.Nb4 a5 21.Na2 Nb6 22.Nc1 (22.Qc1 Qf5–+) 22...Nc4 23.f3 (23.c3 Na3 24.Rb2–+) 23...ef3 (23...ef3 24.Qf2 fg2–+) 0–1. Erbe,Holger (1665) – Walther,Manfred (1890), DESC, 2000.

5.e3 d5 6.Ne2 Qd6 7.f3 ef3 8.Bf3 Nbd7 –/+.

5.e3 d5 6.Ne2 Nbd7 7.0–0 Qe7 8.d3 0–0 9.a3 Bd6 10.Nd2 Rd8 11.f4? (better is 11.de4 de4 12.Qb1-/+) 11...ed3 12.cd3 Qe3 13.Kh1 Qd3 14.Nc1 Qg6 15.f5 Qh6 16.Ne2 Ng4 (16...Ng4 17.Nf3 Ndf6–+) 0–1. Reussner,Hans Dieter – Berger,Waltraud (1660), 04. VCC–Open, 2001.

5.e3 d5 6.f3 c6 7.Ne2 Nbd7 8.fe4 de4 –/+.

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    Available lines:
  • 1.b4 (4 players, 1 day/move)
  • 1.b4 (4 players, 10 days/move)
  • 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 (4 players, 3 days/move)
  • 1.b4 e5 2.Bb2 Bb4 3.f4 ef4 4.Bg7 Qh4 5.g3 fg3 6.Bg2 gh2 7.Kf1 hg1Q 8.Kg1 (Kucharkowski-Meybohm gambit, 6 players, 10 days move)
  • 1.b4 e5 2.Bb2 f6 3.e4 Bb4 4.Bc4 (Sokolski gambit, 4 players, 3 days/move)
  • 1.c4 Nf6 2.b4 (English orangutan, 4 players, 3 days/move)
  • 1.e4 c5 2.b4 (Sicilian: Wing gambit, 4 players, 10 days/move)
  • 1.e4 e6 2.Nf3 d5 3.e5 c5 4.b4 (French: Wing gambit, 4 players, 3 days/move)

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